From 4192b714ea7dbe62c42892caa2757a300e50e1ec Mon Sep 17 00:00:00 2001 From: TeodoreAutuly Date: Tue, 13 Jan 2026 10:22:20 +0100 Subject: [PATCH 1/8] NewSyncFeatureBootstrap --- README.md | 13 + book/.DS_Store | Bin 0 -> 6148 bytes book/SYNC_README.md | 157 +++ book/build.gradle | 79 ++ book/gradle/.DS_Store | Bin 0 -> 6148 bytes book/gradle/wrapper/gradle-wrapper.jar | Bin 0 -> 59203 bytes book/gradle/wrapper/gradle-wrapper.properties | 5 + book/gradlew | 185 +++ book/gradlew.bat | 89 ++ book/settings.gradle | 10 + .../java/org/openflexo/testPamela/App.java | 41 + .../testPamela/DistributedFeatureDemo.java | 517 ++++++++ .../org/openflexo/testPamela/ReplicaA.java | 133 +++ .../org/openflexo/testPamela/ReplicaB.java | 156 +++ .../org/openflexo/testPamela/ReplicaC.java | 148 +++ .../org/openflexo/testPamela/model/Book.java | 74 ++ .../openflexo/testPamela/model/Journal.java | 10 + .../openflexo/testPamela/model/Library.java | 64 + .../org/openflexo/testPamela/model/Novel.java | 10 + .../org/openflexo/testPamela/AppTest.java | 38 + pamela-core/build.gradle | 5 + .../pamela/factory/PamelaModelFactory.java | 21 + .../pamela/factory/ProxyMethodHandler.java | 96 ++ .../pamela/sync/ObjectIdentityManager.java | 167 +++ .../pamela/sync/RabbitMQSyncManager.java | 505 ++++++++ .../pamela/sync/SyncEditingContext.java | 1054 +++++++++++++++++ .../openflexo/pamela/sync/SyncManager.java | 80 ++ .../openflexo/pamela/sync/SyncOperation.java | 230 ++++ .../pamela/sync/SyncOperationListener.java | 71 ++ .../pamela/sync/SyncOperationSerializer.java | 176 +++ .../pamela/sync/SyncValueSerializer.java | 182 +++ .../openflexo/pamela/sync/VectorClock.java | 178 +++ .../openflexo/pamela/sync/package-info.java | 47 + .../test/sync/CollaborativeDocument.java | 112 ++ .../sync/CollaborativeDocumentSyncTest.java | 363 ++++++ .../pamela/test/sync/DocumentSection.java | 58 + .../test/sync/SyncInfrastructureTest.java | 354 ++++++ settings.gradle | 1 + 38 files changed, 5429 insertions(+) create mode 100644 book/.DS_Store create mode 100644 book/SYNC_README.md create mode 100644 book/build.gradle create mode 100644 book/gradle/.DS_Store create mode 100644 book/gradle/wrapper/gradle-wrapper.jar create mode 100644 book/gradle/wrapper/gradle-wrapper.properties create mode 100644 book/gradlew create mode 100644 book/gradlew.bat create mode 100644 book/settings.gradle create mode 100644 book/src/main/java/org/openflexo/testPamela/App.java create mode 100644 book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaA.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaB.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaC.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Book.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Journal.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Library.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Novel.java create mode 100644 book/src/test/java/org/openflexo/testPamela/AppTest.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java diff --git a/README.md b/README.md index 37df5d3c..a56ee39e 100644 --- a/README.md +++ b/README.md @@ -18,3 +18,16 @@ PAMELA approach has been tested and validated on some java-based industrial proj - Dynamic code weaving at runtime (aspect programming without compilation) Official website, documentation and installation available here : [https://www.openflexo.org/pamela](https://www.openflexo.org/pamela) + +## Lunch Sync Feature + +Build the projet with gradle: + +```bash +.\gradlew.bat clean :pamela-core:build :book:classes -x test --console=plain +``` +Then run the Book example with the following command: + +```bash +.\gradlew.bat :book:runDemo --console=plain +``` diff --git a/book/.DS_Store b/book/.DS_Store new file mode 100644 index 0000000000000000000000000000000000000000..2fa56ccf815915cdb257ab6fe36094a3eddce933 GIT binary patch literal 6148 zcmeHKu};H44E50>3M?HN7$PAtA*9YMp$Z>>Iex}sC^zTe4IO1-IjOo}8)^CHDc=jrkO`F8$r*yNS{ z!fSfYr$v=*h;3*c^~`8Q*Z5t~C2E_wGo|t}2hCo7UFG{-Rae7)lVVZZ&z@m@Oc%8% z<+{R}cJ~%5ejRV|&WrFPaenUlYM5`x`Bsr{j*K~FK~D2=9IpC#PqtsH_xIxc+|3?A z{_2G1DpZz@0rYH^&Za}v%78MU416)b=R<_S7z>sT?a={c8w9WovlYy3j|4_+0LFr) zLs%fjg#ulukt>FA;jl;I7YmjST{szOO-3>sxuF=F9s5VtolNXdwKAX#gbcLYW0(8? z(f9ZNFi4-20cBvR7%=T*ko56N(pzgU$GtYf7-F!nU+K_>KuJ5c6K=&@7*? add Harry Potter +[A] ✓ Added: Book(title=Harry Potter) +``` + +**Dans Terminal 2 (ReplicaB) :** (mise à jour automatique) +``` +[B] 📥 Received: ADD on books = Book(title=Harry Potter) +``` + +**Dans Terminal 2 (ReplicaB) :** +``` +[B] > add Le Seigneur des Anneaux +``` + +**Dans Terminal 1 (ReplicaA) :** (mise à jour automatique) +``` +[A] 📥 Received: ADD on books = ... +``` + +## Commandes disponibles + +| Commande | Description | +|----------|-------------| +| `add ` | Ajoute un livre à la bibliothèque | +| `remove ` | Supprime un livre par son titre | +| `list` | Affiche tous les livres | +| `quit` | Quitte l'application | + +## Structure des fichiers + +``` +book/ +├── build.gradle # Dépendances (RabbitMQ, Jackson) +├── SYNC_README.md # Ce fichier +└── src/main/java/org/openflexo/testPamela/ + ├── model/ + │ ├── Book.java # Modèle PAMELA d'un livre + │ ├── Library.java # Modèle PAMELA d'une bibliothèque + │ ├── Novel.java # Sous-type de Book + │ └── Journal.java # Sous-type de Book + ├── App.java # Exemple original simple + ├── ReplicaA.java # Première instance collaborative + └── ReplicaB.java # Seconde instance collaborative +``` + +## Comment ça marche ? + +1. **SyncEditingContext** : Contexte d'édition étendu qui intercepte les modifications +2. **RabbitMQSyncManager** : Gère la connexion à RabbitMQ et la diffusion des messages +3. **ObjectIdentityManager** : Associe chaque objet PAMELA à un UUID unique +4. **SyncOperation** : Représente une opération (CREATE, SET, ADD, REMOVE, DELETE) +5. **VectorClock** : Horloge vectorielle pour l'ordre causal des opérations + +Quand vous faites `library.addToBooks(book)` : +1. Le `ProxyMethodHandler` détecte l'appel au setter +2. Il broadcast une `SyncOperation` via `SyncEditingContext` +3. Le `RabbitMQSyncManager` publie le message JSON sur l'exchange +4. Toutes les réplicas reçoivent le message et appliquent l'opération + +## Dépannage + +### RabbitMQ ne démarre pas +```bash +docker logs rabbitmq +``` + +### Erreur de connexion +Vérifiez que le port 5672 est accessible : +```bash +docker ps | findstr rabbitmq +``` + +### Les messages ne se synchronisent pas +1. Vérifiez que les deux réplicas utilisent le même Library ID +2. Consultez les messages dans RabbitMQ Management UI (http://localhost:15672) +3. Vérifiez l'exchange "pamela-library-sync" + +## Arrêter RabbitMQ + +```bash +docker stop rabbitmq +docker rm rabbitmq +``` diff --git a/book/build.gradle b/book/build.gradle new file mode 100644 index 00000000..2899fcb9 --- /dev/null +++ b/book/build.gradle @@ -0,0 +1,79 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * This generated file contains a sample Java project to get you started. + * For more details take a look at the Java Quickstart chapter in the Gradle + * User Manual available at https://docs.gradle.org/6.6.1/userguide/tutorial_java_projects.html + */ + +plugins { + // Apply the java plugin to add support for Java + id 'java' + + // Apply the application plugin to add support for building a CLI application. + id 'application' +} + +repositories { + maven { + url "https://maven.openflexo.org/artifactory/openflexo-deps/" + } + mavenCentral() +// jcenter() +} + +dependencies { + // Use local pamela-core project (includes the sync package) + implementation project(':pamela-core') + + // RabbitMQ for collaborative synchronization + implementation 'com.rabbitmq:amqp-client:5.20.0' + + // Jackson for JSON serialization + implementation 'com.fasterxml.jackson.core:jackson-databind:2.16.0' + + // Use JUnit test framework + testImplementation 'junit:junit:4.13' +} + +application { + // Define the main class for the application. + // Can be overridden with: gradlew run -PmainClass=org.openflexo.testPamela.ReplicaA + mainClassName = project.hasProperty('mainClass') ? project.property('mainClass') : 'org.openflexo.testPamela.App' +} + +// Task to run ReplicaA +task runReplicaA(type: JavaExec) { + group = 'application' + description = 'Run the first collaborative replica (ReplicaA)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaA' + standardInput = System.in +} + +// Task to run ReplicaB +task runReplicaB(type: JavaExec) { + group = 'application' + description = 'Run the second collaborative replica (ReplicaB)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaB' + standardInput = System.in +} + +// Task to run ReplicaC +task runReplicaC(type: JavaExec) { + group = 'application' + description = 'Run the third collaborative replica (ReplicaC)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaC' + standardInput = System.in +} + +// Task to run the Distributed Feature Demo +task runDemo(type: JavaExec) { + group = 'application' + description = 'Run the distributed features demonstration' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.DistributedFeatureDemo' + standardInput = System.in +} diff --git a/book/gradle/.DS_Store b/book/gradle/.DS_Store new file mode 100644 index 0000000000000000000000000000000000000000..5008ddfcf53c02e82d7eee2e57c38e5672ef89f6 GIT binary patch literal 6148 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z#f8w6F}^!?^KE#+ZDv+xd5O&3EmomZzsv?>E-~ygGum45fk!SBN&|eo1rKw^?aZJ4 E2O(~oYXATM literal 0 HcmV?d00001 diff --git a/book/gradle/wrapper/gradle-wrapper.properties b/book/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 00000000..3ae1e2f1 --- /dev/null +++ b/book/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/book/gradlew b/book/gradlew new file mode 100644 index 00000000..4f906e0c --- /dev/null +++ b/book/gradlew @@ -0,0 +1,185 @@ +#!/usr/bin/env sh + +# +# Copyright 2015 the original author or authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin or MSYS, switch paths to Windows format before running java +if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=`expr $i + 1` + done + case $i in + 0) set -- ;; + 1) set -- "$args0" ;; + 2) set -- "$args0" "$args1" ;; + 3) set -- "$args0" "$args1" "$args2" ;; + 4) set -- "$args0" "$args1" "$args2" "$args3" ;; + 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=`save "$@"` + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +exec "$JAVACMD" "$@" diff --git a/book/gradlew.bat b/book/gradlew.bat new file mode 100644 index 00000000..107acd32 --- /dev/null +++ b/book/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/book/settings.gradle b/book/settings.gradle new file mode 100644 index 00000000..b23f0f0a --- /dev/null +++ b/book/settings.gradle @@ -0,0 +1,10 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * + * Detailed information about configuring a multi-project build in Gradle can be found + * in the user manual at https://docs.gradle.org/6.6.1/userguide/multi_project_builds.html + */ + +rootProject.name = 'book' diff --git a/book/src/main/java/org/openflexo/testPamela/App.java b/book/src/main/java/org/openflexo/testPamela/App.java new file mode 100644 index 00000000..fdfdd4d8 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/App.java @@ -0,0 +1,41 @@ +/* + * This Java source file was generated by the Gradle 'init' task. + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +public class App { + + public Library books; + + public App() throws ModelDefinitionException { + // Instantiate the meta-model + // by computing the closure of concepts graph + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + // Instantiate the factory + PamelaModelFactory factory = new PamelaModelFactory(pamelaMetaModel); + + // Instantiate a book, the Book class has been loaded because Library depends on Book + Book aBook = factory.newInstance(Book.class, "Lord of the ring"); + + this.books = factory.newInstance(Library.class); + this.books.addToBooks(aBook); + System.out.println("result is " + aBook); + if (aBook.isCorrect()) { + System.out.println("result is correct"); + } else { + System.out.println("result is not correct"); + } + } + + public static void main(String[] args) throws ModelDefinitionException { + App app = new App(); + System.out.println("library is " + app.books); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java b/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java new file mode 100644 index 00000000..0fcede1d --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java @@ -0,0 +1,517 @@ +/* + * PAMELA Distributed Features Demo + * + * This application demonstrates ALL distributed synchronization features: + * + * 1. STATE_REQUEST / STATE_RESPONSE - State sync for new clients + * 2. CREATE - Object creation synchronization + * 3. SET - Property setter synchronization + * 4. ADD - Collection adder synchronization + * 5. REMOVE - Collection remover synchronization + * 6. DELETE - Object deletion synchronization + * 7. VectorClock - Causality tracking + * 8. Auto state request on connect + * + * Run multiple instances to see real-time synchronization! + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; +import java.util.concurrent.atomic.AtomicInteger; + +public class DistributedFeatureDemo { + + private static Library library; + private static PamelaModelFactory factory; + private static SyncEditingContext syncContext; + private static String replicaName; + private static final AtomicInteger bookCounter = new AtomicInteger(1); + + // CloudAMQP configuration + private static final String AMQP_HOST = "rat.rmq2.cloudamqp.com"; + private static final int AMQP_PORT = 5671; + private static final String AMQP_USER = "gcyabtej"; + private static final String AMQP_PASS = "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU"; + private static final String AMQP_VHOST = "gcyabtej"; + + public static void main(String[] args) throws Exception { + printBanner(); + + Scanner scanner = new Scanner(System.in); + + // Get replica name + System.out.print("Enter your replica name (e.g., Alice, Bob, Charlie): "); + replicaName = scanner.nextLine().trim(); + if (replicaName.isEmpty()) { + replicaName = "Replica-" + System.currentTimeMillis() % 1000; + } + + System.out.println(); + System.out.println("[" + replicaName + "] Initializing PAMELA..."); + + // Initialize PAMELA + PamelaMetaModel metaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + factory = new PamelaModelFactory(metaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager + System.out.println("[" + replicaName + "] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host(AMQP_HOST) + .port(AMQP_PORT) + .credentials(AMQP_USER, AMQP_PASS) + .virtualHost(AMQP_VHOST) + .useSsl(true) + .exchangeName("pamela-distributed-demo") + .build(); + + // Setup sync context with auto state request + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add operation listener for visibility + syncManager.addListener(createOperationListener()); + + try { + syncManager.connect(); + System.out.println("[" + replicaName + "] ✓ Connected! Replica ID: " + + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[" + replicaName + "] ✗ Connection failed: " + e.getMessage()); + return; + } + + // Ask if joining existing session or creating new + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ 1. CREATE new library (if you're the first replica) ║"); + System.out.println("║ 2. JOIN existing library (enter Library ID from another) ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.print("Choice [1/2]: "); + + String choice = scanner.nextLine().trim(); + + if ("2".equals(choice)) { + // Join existing library + System.out.print("Enter Library ID: "); + String libraryId = scanner.nextLine().trim(); + + if (!libraryId.isEmpty()) { + // Create local library and register with same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[" + replicaName + "] Registered with Library ID: " + libraryId); + + // Request state from other replicas (KEY FEATURE: STATE_REQUEST) + System.out.println("[" + replicaName + "] 📡 Requesting current state from other replicas..."); + syncContext.requestStateSync(); + + // Wait for state to arrive + Thread.sleep(3000); + System.out.println("[" + replicaName + "] ✓ State sync complete!"); + System.out.println("[" + replicaName + "] Books received: " + library.getBooks().size()); + printLibrary(); + } else { + createNewLibrary(); + } + } else { + createNewLibrary(); + } + + // Print commands help + printHelp(); + + // Interactive command loop + while (true) { + System.out.print("[" + replicaName + "] > "); + String input = scanner.nextLine().trim(); + + if (input.isEmpty()) continue; + + String[] parts = input.split("\\s+", 2); + String command = parts[0].toLowerCase(); + String argument = parts.length > 1 ? parts[1] : ""; + + try { + switch (command) { + case "help": + printHelp(); + break; + + case "add": + // TEST: ADD operation + testAddOperation(argument); + break; + + case "remove": + // TEST: REMOVE operation + testRemoveOperation(argument); + break; + + case "set": + // TEST: SET operation + testSetOperation(argument); + break; + + case "move": + // TEST: REINDEX operation + testMoveOperation(argument); + break; + + case "list": + printLibrary(); + break; + + case "state": + // TEST: STATE_REQUEST + System.out.println("[" + replicaName + "] Requesting state sync..."); + syncContext.requestStateSync(); + break; + + case "info": + printInfo(syncManager); + break; + + case "quit": + case "exit": + System.out.println("[" + replicaName + "] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[" + replicaName + "] Goodbye!"); + return; + + case "demo": + runFullDemo(); + break; + + default: + System.out.println("Unknown command. Type 'help' for available commands."); + } + } catch (Exception e) { + System.out.println("[" + replicaName + "] Error: " + e.getMessage()); + } + } + } + + private static void createNewLibrary() { + library = factory.newInstance(Library.class); + String libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ NEW LIBRARY CREATED ║"); + System.out.println("║ Library ID: " + libraryId); + System.out.println("║ ║"); + System.out.println("║ Share this ID with other replicas to join! ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + /** + * TEST: ADD operation - adds a book to the library + */ + private static void testAddOperation(String title) { + if (title.isEmpty()) { + title = "Book-" + replicaName + "-" + bookCounter.getAndIncrement(); + } + + Book book = factory.newInstance(Book.class, title); + book.setISBN(replicaName + "-" + System.currentTimeMillis()); + book.setPages(100 + (int)(Math.random() * 400)); + + library.addToBooks(book); + + System.out.println("[" + replicaName + "] ✓ ADD: Created and added '" + title + "'"); + System.out.println(" → This triggers CREATE + ADD operations broadcast to all replicas"); + } + + /** + * TEST: REMOVE operation - removes a book from the library + */ + private static void testRemoveOperation(String title) { + if (title.isEmpty()) { + System.out.println("Usage: remove "); + return; + } + + Book book = library.getBook(title); + if (book != null) { + library.removeFromBooks(book); + System.out.println("[" + replicaName + "] ✓ REMOVE: Removed '" + title + "'"); + System.out.println(" → This triggers REMOVE operation broadcast to all replicas"); + } else { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + System.out.println(" Available books:"); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle()); + } + } + } + + /** + * TEST: SET operation - modifies a book's property + */ + private static void testSetOperation(String args) { + // Format: set <property> <value> + // Example: set MyBook pages 500 + String[] parts = args.split("\\s+", 3); + if (parts.length < 3) { + System.out.println("Usage: set <book title> <property> <value>"); + System.out.println(" Properties: title, isbn, pages"); + System.out.println(" Example: set MyBook pages 500"); + return; + } + + String title = parts[0]; + String property = parts[1].toLowerCase(); + String value = parts[2]; + + Book book = library.getBook(title); + if (book == null) { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + return; + } + + switch (property) { + case "title": + book.setTitle(value); + System.out.println("[" + replicaName + "] ✓ SET: Changed title to '" + value + "'"); + break; + case "isbn": + book.setISBN(value); + System.out.println("[" + replicaName + "] ✓ SET: Changed ISBN to '" + value + "'"); + break; + case "pages": + book.setPages(Integer.parseInt(value)); + System.out.println("[" + replicaName + "] ✓ SET: Changed pages to " + value); + break; + default: + System.out.println("Unknown property: " + property); + return; + } + System.out.println(" → This triggers SET operation broadcast to all replicas"); + } + + /** + * TEST: REINDEX operation - moves a book to a different position + */ + private static void testMoveOperation(String args) { + // Format: move <title> <new index> + String[] parts = args.split("\\s+", 2); + if (parts.length < 2) { + System.out.println("Usage: move <book title> <new index>"); + System.out.println(" Example: move MyBook 0 (moves to first position)"); + return; + } + + String title = parts[0]; + int newIndex = Integer.parseInt(parts[1]); + + Book book = library.getBook(title); + if (book == null) { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + return; + } + + library.moveBookToIndex(book, newIndex); + System.out.println("[" + replicaName + "] ✓ MOVE: Moved '" + title + "' to index " + newIndex); + System.out.println(" → This triggers REINDEX operation broadcast to all replicas"); + } + + /** + * Run a full demo of all features + */ + private static void runFullDemo() throws InterruptedException { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ RUNNING FULL DISTRIBUTED FEATURES DEMO ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // 1. ADD - Create and add books + System.out.println("▶ STEP 1: Testing ADD operation (CREATE + ADD)"); + testAddOperation("Demo-Book-1"); + Thread.sleep(500); + testAddOperation("Demo-Book-2"); + Thread.sleep(500); + testAddOperation("Demo-Book-3"); + Thread.sleep(1000); + printLibrary(); + + // 2. SET - Modify properties + System.out.println(); + System.out.println("▶ STEP 2: Testing SET operation"); + testSetOperation("Demo-Book-1 pages 999"); + Thread.sleep(500); + testSetOperation("Demo-Book-2 isbn DEMO-ISBN-123"); + Thread.sleep(1000); + printLibrary(); + + // 3. MOVE - Reorder + System.out.println(); + System.out.println("▶ STEP 3: Testing REINDEX/MOVE operation"); + testMoveOperation("Demo-Book-3 0"); + Thread.sleep(1000); + printLibrary(); + + // 4. REMOVE - Delete + System.out.println(); + System.out.println("▶ STEP 4: Testing REMOVE operation"); + testRemoveOperation("Demo-Book-2"); + Thread.sleep(1000); + printLibrary(); + + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ DEMO COMPLETE! ║"); + System.out.println("║ ║"); + System.out.println("║ If you have another replica connected, it should now have ║"); + System.out.println("║ received all these operations in real-time! ║"); + System.out.println("║ ║"); + System.out.println("║ Try 'state' command on a new replica to test STATE_SYNC ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static void printLibrary() { + System.out.println(); + System.out.println("┌─────────────────────────────────────────────────────────────────┐"); + System.out.println("│ LIBRARY CONTENTS (" + library.getBooks().size() + " books)"); + System.out.println("├─────────────────────────────────────────────────────────────────┤"); + + int idx = 0; + for (Book book : library.getBooks()) { + System.out.printf("│ [%d] %-20s ISBN: %-20s Pages: %d%n", + idx++, + truncate(book.getTitle(), 20), + truncate(book.getISBN(), 20), + book.getPages()); + } + + if (library.getBooks().isEmpty()) { + System.out.println("│ (empty) │"); + } + + System.out.println("└─────────────────────────────────────────────────────────────────┘"); + System.out.println(); + } + + private static void printInfo(RabbitMQSyncManager syncManager) { + System.out.println(); + System.out.println("┌─────────────────────────────────────────────────────────────────┐"); + System.out.println("│ SYNC INFO │"); + System.out.println("├─────────────────────────────────────────────────────────────────┤"); + System.out.println("│ Replica Name: " + replicaName); + System.out.println("│ Replica ID: " + syncManager.getReplicaId()); + System.out.println("│ Connected: " + syncManager.isConnected()); + System.out.println("│ State Recv: " + syncContext.isStateReceived()); + System.out.println("│ Objects: " + syncContext.getIdentityManager().size()); + System.out.println("│ Vector Clock: " + syncManager.getVectorClock()); + System.out.println("└─────────────────────────────────────────────────────────────────┘"); + System.out.println(); + } + + private static void printHelp() { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ DISTRIBUTED PAMELA COMMANDS ║"); + System.out.println("╠═══════════════════════════════════════════════════════════════╣"); + System.out.println("║ add [title] - Add a new book (tests ADD + CREATE) ║"); + System.out.println("║ remove <title> - Remove a book (tests REMOVE) ║"); + System.out.println("║ set <title> <prop> <val> - Modify property (tests SET) ║"); + System.out.println("║ move <title> <index> - Reorder book (tests REINDEX) ║"); + System.out.println("║ list - Show all books ║"); + System.out.println("║ state - Request state from replicas ║"); + System.out.println("║ info - Show sync information ║"); + System.out.println("║ demo - Run full feature demonstration ║"); + System.out.println("║ quit - Exit ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static void printBanner() { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════════════╗"); + System.out.println("║ ║"); + System.out.println("║ ██████╗ █████╗ ███╗ ███╗███████╗██╗ █████╗ ║"); + System.out.println("║ ██╔══██╗██╔══██╗████╗ ████║██╔════╝██║ ██╔══██╗ ║"); + System.out.println("║ ██████╔╝███████║██╔████╔██║█████╗ ██║ ███████║ ║"); + System.out.println("║ ██╔═══╝ ██╔══██║██║╚██╔╝██║██╔══╝ ██║ ██╔══██║ ║"); + System.out.println("║ ██║ ██║ ██║██║ ╚═╝ ██║███████╗███████╗██║ ██║ ║"); + System.out.println("║ ╚═╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚══════╝╚═╝ ╚═╝ ║"); + System.out.println("║ ║"); + System.out.println("║ D I S T R I B U T E D S Y N C D E M O ║"); + System.out.println("║ ║"); + System.out.println("║ Testing: STATE_SYNC | CREATE | SET | ADD | REMOVE | REINDEX ║"); + System.out.println("║ ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static SyncOperationListener createOperationListener() { + return new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[" + replicaName + "] 📥 RECEIVED: " + operation.getOperationType()); + System.out.println(" Object: " + operation.getObjectId().substring(0, 8) + "..."); + if (operation.getPropertyIdentifier() != null) { + System.out.println(" Property: " + operation.getPropertyIdentifier()); + } + if (operation.getNewValueSerialized() != null) { + System.out.println(" Value: " + truncate(operation.getNewValueSerialized(), 40)); + } + System.out.println(" From: " + operation.getReplicaId().substring(0, 8) + "..."); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onStateRequested(String requestingReplicaId) { + System.out.println(); + System.out.println("[" + replicaName + "] 📡 STATE_REQUEST received from: " + + requestingReplicaId.substring(0, 8) + "..."); + System.out.println(" → Sending current state with " + library.getBooks().size() + " books"); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onStateReceived(String stateSnapshot, String fromReplicaId) { + System.out.println(); + System.out.println("[" + replicaName + "] 📥 STATE_RESPONSE received from: " + + fromReplicaId.substring(0, 8) + "..."); + System.out.println(" → Restoring state..."); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onConnected() { + System.out.println("[" + replicaName + "] 🔗 Connected to sync network"); + } + + @Override + public void onDisconnected(String reason) { + System.out.println("[" + replicaName + "] ⚠️ Disconnected: " + reason); + } + + @Override + public void onError(Throwable error) { + System.out.println("[" + replicaName + "] ❌ Error: " + error.getMessage()); + } + }; + } + + private static String truncate(String str, int maxLen) { + if (str == null) return ""; + if (str.length() <= maxLen) return str; + return str.substring(0, maxLen - 3) + "..."; + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaA.java b/book/src/main/java/org/openflexo/testPamela/ReplicaA.java new file mode 100644 index 00000000..d0385abf --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaA.java @@ -0,0 +1,133 @@ +/* + * Replica A - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this first, then start ReplicaB and enter the Library ID. + * After ReplicaB is connected, add books and see them sync! + * + * Prerequisites: + * docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaA { + + private static Library library; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA A ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + SyncEditingContext syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[A] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations from ReplicaB + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[A] 📥 Received from remote: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " value=" + operation.getNewValueSerialized()); + System.out.println("[A] Current library books: " + library.getBooks().size()); + System.out.print("[A] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[A] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[A] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[A] Make sure RabbitMQ is running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management"); + return; + } + + // Create a library (no initial books - wait for ReplicaB to connect first!) + library = factory.newInstance(Library.class); + String libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println(); + System.out.println("[A] Created Library with ID: " + libraryId); + System.out.println(" ⚠️ COPY THIS ID to use in ReplicaB!"); + System.out.println(); + System.out.println(" ➡️ Start ReplicaB now, enter the ID, then add books here!"); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + Scanner scanner = new Scanner(System.in); + while (true) { + System.out.print("[A] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[A] Library: " + library); + System.out.println("[A] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("A-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[A] ✓ Added: " + newBook.getTitle() + " (broadcasting to replicas...)"); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[A] ✓ Removed: " + title); + } else { + System.out.println("[A] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[A] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[A] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[A] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaB.java b/book/src/main/java/org/openflexo/testPamela/ReplicaB.java new file mode 100644 index 00000000..0e62fada --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaB.java @@ -0,0 +1,156 @@ +/* + * Replica B - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this AFTER ReplicaA to receive synchronized updates. + * + * Prerequisites: + * 1. RabbitMQ running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * 2. ReplicaA running and note the Library ID + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaB { + + private static Library library; + private static SyncEditingContext syncContext; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA B ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[B] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[B] 📥 Received: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " = " + operation.getNewValueSerialized()); + System.out.println("[B] Current library: " + library); + System.out.print("[B] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[B] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[B] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[B] Make sure RabbitMQ is running!"); + return; + } + + System.out.println(); + System.out.println("[B] Waiting for Library ID from ReplicaA..."); + System.out.print("[B] Enter Library ID (from ReplicaA): "); + + Scanner scanner = new Scanner(System.in); + String libraryId = scanner.nextLine().trim(); + + if (libraryId.isEmpty()) { + // Create a new library if no ID provided + library = factory.newInstance(Library.class); + libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println("[B] Created new Library with ID: " + libraryId); + } else { + // Create a local library and register with the same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[B] ✓ Registered local Library with shared ID: " + libraryId); + + // Request state from other replicas to get existing books + System.out.println("[B] 📡 Requesting state from other replicas..."); + syncContext.requestStateSync(); + + // Wait a moment for state to arrive + Thread.sleep(2000); + System.out.println("[B] ✓ State sync complete. Books received: " + library.getBooks().size()); + } + + System.out.println(); + System.out.println("[B] Library state: " + library); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("Waiting for updates from ReplicaA..."); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + while (true) { + System.out.print("[B] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[B] Library: " + library); + System.out.println("[B] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("NEW-B-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[B] ✓ Added: " + newBook); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[B] ✓ Removed: " + title); + } else { + System.out.println("[B] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[B] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[B] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[B] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaC.java b/book/src/main/java/org/openflexo/testPamela/ReplicaC.java new file mode 100644 index 00000000..c95c014d --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaC.java @@ -0,0 +1,148 @@ +/* + * Replica C - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this AFTER ReplicaA to receive synchronized updates (3rd replica). + * + * Prerequisites: + * 1. RabbitMQ running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * 2. ReplicaA running and note the Library ID + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaC { + + private static Library library; + private static SyncEditingContext syncContext; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA C ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[C] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[C] 📥 Received: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " = " + operation.getNewValueSerialized()); + System.out.println("[C] Current library: " + library); + System.out.print("[C] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[C] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[C] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[C] Make sure RabbitMQ is running!"); + return; + } + + System.out.println(); + System.out.println("[C] Waiting for Library ID from ReplicaA..."); + System.out.print("[C] Enter Library ID (from ReplicaA): "); + + Scanner scanner = new Scanner(System.in); + String libraryId = scanner.nextLine().trim(); + + if (libraryId.isEmpty()) { + // Create a new library if no ID provided + library = factory.newInstance(Library.class); + libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println("[C] Created new Library with ID: " + libraryId); + } else { + // Create a local library and register with the same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[C] ✓ Registered local Library with shared ID: " + libraryId); + } + + System.out.println(); + System.out.println("[C] Library state: " + library); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("Waiting for updates from ReplicaA..."); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + while (true) { + System.out.print("[C] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[C] Library: " + library); + System.out.println("[C] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("NEW-C-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[C] ✓ Added: " + newBook); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[C] ✓ Removed: " + title); + } else { + System.out.println("[C] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[C] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[C] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[C] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Book.java b/book/src/main/java/org/openflexo/testPamela/model/Book.java new file mode 100644 index 00000000..c140cc6a --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Book.java @@ -0,0 +1,74 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; +import org.checkerframework.checker.units.qual.s; +import org.openflexo.pamela.AccessibleProxyObject; + +@ModelEntity +@Imports({@Import(org.openflexo.testPamela.model.Novel.class), @Import(org.openflexo.testPamela.model.Journal.class)}) +@ImplementationClass(Book.BookImpl.class) +public interface Book extends AccessibleProxyObject { + + static final String TITLE = "title"; + static final String ISBN = "ISBN"; + static final String PAGES = "pages"; + + @Initializer + Book init(@Parameter(TITLE)String aTitle); + + @Getter(TITLE) + String getTitle(); + + @Setter(TITLE) + void setTitle(String aTitle); + + @Getter(ISBN) + String getISBN(); + + @Setter(ISBN) + void setISBN(String value); + + @Getter(PAGES) + Integer getPages(); + + @Setter(PAGES) + void setPages(Integer value); + + boolean isCorrect(); + + // Provides a partial implementation for Book + static abstract class BookImpl implements Book { + @Override + public String getISBN() { + String isbn = (String) performSuperGetter(ISBN); + if (isbn == null) { + return "Unknown"; + } + return isbn; + } + + @Override + public Integer getPages() { + Integer pages = (Integer) performSuperGetter(PAGES); + if (pages == null) { + return 100; + } + return pages; + } + + @Override + public String toString() { + String title = getTitle(); + String isbn = getISBN(); + Integer pages = getPages(); + return "Book(" + title + "," + isbn + "," + pages + "," + getClass().getSimpleName() + ")"; + } + + public boolean isCorrect() { + return getTitle() != null && getISBN() != null; + } + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Journal.java b/book/src/main/java/org/openflexo/testPamela/model/Journal.java new file mode 100644 index 00000000..152dcb49 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Journal.java @@ -0,0 +1,10 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; + +@ModelEntity +public interface Journal extends Book { +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Library.java b/book/src/main/java/org/openflexo/testPamela/model/Library.java new file mode 100644 index 00000000..74f1c9cc --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Library.java @@ -0,0 +1,64 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; +import org.openflexo.pamela.annotations.Getter.Cardinality; +import org.openflexo.pamela.AccessibleProxyObject; + +import java.io.File; +import java.io.FileFilter; +import java.util.Iterator; +import java.util.List; + +@ModelEntity +@ImplementationClass(Library.LibraryImpl.class) +public interface Library extends AccessibleProxyObject, Iterable<Book> { + + static String BOOKS = "books"; + static String FILE = "file"; + + @Getter(value = BOOKS, cardinality = Cardinality.LIST) + List<Book> getBooks(); + + @Getter(value = FILE, ignoreType = true) + FileFilter getFile(); + + @Setter(FILE) + void setFile(FileFilter file); + + @Adder(BOOKS) + void addToBooks(Book aBook); + + @Remover(BOOKS) + void removeFromBooks(Book aBook); + + @Reindexer(BOOKS) + void moveBookToIndex(Book aBook, int index); + + @Finder(collection = BOOKS, attribute = "title") + Book getBook(String title); + + // Provides a partial implementation for Book + static abstract class LibraryImpl implements Library { + @Override + public String toString() { + StringBuilder str = new StringBuilder("["); + boolean first =true; + for (Book b : getBooks()) { + if (!first) { + str.append(","); + } + str.append(b); + } + str.append("]"); + return str.toString(); + } + + @Override + public Iterator<Book> iterator() { + return getBooks().iterator(); + } + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Novel.java b/book/src/main/java/org/openflexo/testPamela/model/Novel.java new file mode 100644 index 00000000..99271fd3 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Novel.java @@ -0,0 +1,10 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; + +@ModelEntity +public interface Novel extends Book { +} diff --git a/book/src/test/java/org/openflexo/testPamela/AppTest.java b/book/src/test/java/org/openflexo/testPamela/AppTest.java new file mode 100644 index 00000000..968269db --- /dev/null +++ b/book/src/test/java/org/openflexo/testPamela/AppTest.java @@ -0,0 +1,38 @@ +/* + * This Java source file was generated by the Gradle 'init' task. + */ +package org.openflexo.testPamela; + +import org.junit.Test; +import static org.junit.Assert.*; +import org.openflexo.testPamela.model.Book; +import org.openflexo.pamela.exceptions.ModelDefinitionException; + +public class AppTest { + + @Test + public void testLord() throws ModelDefinitionException { + App classUnderTest = new App(); + boolean found = false; + for (Book b : classUnderTest.books) { + if (b.getTitle().equals("Lord of the ring")) { + found = true; + break; + } + } + assertTrue("app should have 'Lord of the ring'", found); + } + + @Test + public void testOther() throws ModelDefinitionException { + App classUnderTest = new App(); + boolean found = false; + for (Book b : classUnderTest.books) { + if (b.getTitle().equals("God of the ring")) { + found = true; + break; + } + } + assertFalse("app should not have 'God of the ring'", found); + } +} diff --git a/pamela-core/build.gradle b/pamela-core/build.gradle index 5090131e..e2e5dcde 100644 --- a/pamela-core/build.gradle +++ b/pamela-core/build.gradle @@ -6,6 +6,11 @@ dependencies { // Lots of test errors when using 3.30.2 // Error when using 3.23 (see below) + // RabbitMQ for collaborative synchronization + api group: 'com.rabbitmq', name: 'amqp-client', version: '5.20.0' + + // Jackson for JSON serialization of sync operations + api group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.16.0' } // /Users/fdagnat/git/pamela/pamela-core/src/main/java/org/openflexo/pamela/factory/ModelFactory.java:399: error: incompatible types: Class<CAP#1> cannot be converted to Class<? extends I> // return proxyFactory.getSuperclass(); diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java index 7a752950..e62e35e9 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java @@ -66,6 +66,7 @@ import org.openflexo.pamela.model.ModelProperty; import org.openflexo.pamela.model.StringConverterLibrary.Converter; import org.openflexo.pamela.undo.CreateCommand; +import org.openflexo.pamela.sync.SyncEditingContext; import org.openflexo.pamela.xml.XMLSaxDeserializer; import org.openflexo.pamela.xml.XMLSerializer; @@ -451,6 +452,16 @@ public <I> I newInstance(Class<I> implementedInterface, Object... args) { if (getEditingContext().getUndoManager() != null) { getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); } + // Broadcast CREATE operation for collaborative sync + if (getEditingContext() instanceof SyncEditingContext) { + SyncEditingContext syncContext = (SyncEditingContext) getEditingContext(); + if (!syncContext.isApplyingRemoteOperation()) { + ProxyMethodHandler<?> handler = getHandler(returned); + if (handler != null) { + handler.broadcastCreateOperation(); + } + } + } } // this.getModelContext().getPatternContext().leavingConstructor(); getModelContext().notifiedNewInstance(returned, getModelEntityForInstance(returned)); @@ -491,6 +502,16 @@ public <I> I _newInstance(Class<I> implementedInterface, boolean useExtended, Ob if (getEditingContext().getUndoManager() != null) { getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); } + // Broadcast CREATE operation for collaborative sync + if (getEditingContext() instanceof SyncEditingContext) { + SyncEditingContext syncContext = (SyncEditingContext) getEditingContext(); + if (!syncContext.isApplyingRemoteOperation()) { + ProxyMethodHandler<?> handler = getHandler(returned); + if (handler != null) { + handler.broadcastCreateOperation(); + } + } + } } return returned; } catch (IllegalArgumentException e) { diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java index 61c76901..4a419928 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java @@ -122,6 +122,7 @@ import org.openflexo.pamela.undo.RemoveCommand; import org.openflexo.pamela.undo.SetCommand; import org.openflexo.pamela.undo.UndoManager; +import org.openflexo.pamela.sync.SyncEditingContext; import org.openflexo.toolbox.HasPropertyChangeSupport; import com.google.common.base.Defaults; @@ -1064,6 +1065,11 @@ else if (property.getCardinality() == Cardinality.LIST) { getUndoManager().addEdit(new DeleteCommand<>(getObject(), getModelEntity(), getModelFactory())); } + // Broadcast delete operation to other replicas + if (trackAtomicEdit) { + broadcastDeleteOperation(); + } + deleted = true; deleting = false; @@ -1419,6 +1425,11 @@ private <T> void internallyInvokeSetter(ModelProperty<? super I> property, Setta } } propertyImplementation.set(value); + + // Broadcast sync operation if connected + if (trackAtomicEdit && oldValue != value) { + broadcastSetOperation(property, oldValue, value); + } } private <T> void internallyInvokeUpdater(ModelProperty<? super I> property, SettablePropertyImplementation<I, T> propertyImplementation, @@ -1439,6 +1450,11 @@ private <T> void internallyInvokeAdder(ModelProperty<? super I> property, Multip getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); } propertyImplementation.addTo(value, index); + + // Broadcast sync operation if connected + if (trackAtomicEdit) { + broadcastAddOperation(property, value, index); + } } private <T> void internallyInvokeRemover(ModelProperty<? super I> property, MultiplePropertyImplementation<I, T> propertyImplementation, @@ -1448,6 +1464,11 @@ private <T> void internallyInvokeRemover(ModelProperty<? super I> property, Mult getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); } propertyImplementation.removeFrom(value); + + // Broadcast sync operation if connected + if (trackAtomicEdit) { + broadcastRemoveOperation(property, value); + } } private <T> void internallyInvokeReindexer(ModelProperty<? super I> property, @@ -2637,4 +2658,79 @@ private void checkOnExit(Method method, Object[] args) { } + // ======================================================================== + // Synchronization support methods for collaborative editing via RabbitMQ + // ======================================================================== + + /** + * Get the SyncEditingContext if available + * + * @return SyncEditingContext or null if not in sync mode + */ + private SyncEditingContext getSyncEditingContext() { + EditingContext ctx = getEditingContext(); + if (ctx instanceof SyncEditingContext) { + return (SyncEditingContext) ctx; + } + return null; + } + + /** + * Check if we should broadcast operations (not applying remote operations) + */ + private boolean shouldBroadcast() { + SyncEditingContext syncCtx = getSyncEditingContext(); + return syncCtx != null && !syncCtx.isApplyingRemoteOperation(); + } + + /** + * Broadcast a SET operation to other replicas + */ + private void broadcastSetOperation(ModelProperty<? super I> property, Object oldValue, Object newValue) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastSet(getObject(), property, oldValue, newValue); + } + } + + /** + * Broadcast an ADD operation to other replicas + */ + private void broadcastAddOperation(ModelProperty<? super I> property, Object addedValue, int index) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastAdd(getObject(), property, addedValue, index); + } + } + + /** + * Broadcast a REMOVE operation to other replicas + */ + private void broadcastRemoveOperation(ModelProperty<? super I> property, Object removedValue) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastRemove(getObject(), property, removedValue); + } + } + + /** + * Broadcast a DELETE operation to other replicas + */ + public void broadcastDeleteOperation() { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastDelete(getObject()); + } + } + + /** + * Broadcast a CREATE operation to other replicas + */ + public void broadcastCreateOperation() { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastCreate(getObject(), getModelEntity().getImplementedInterface().getName()); + } + } + } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java new file mode 100644 index 00000000..ae936473 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java @@ -0,0 +1,167 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.util.Map; +import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; + +/** + * Manages unique identifiers for PAMELA objects across distributed instances. + * Each object gets a UUID that is stable across all replicas. + * + * @author PAMELA Team + */ +public class ObjectIdentityManager { + + // Maps objects to their unique IDs + private final Map<Object, String> objectToId = new ConcurrentHashMap<>(); + + // Maps IDs back to objects + private final Map<String, Object> idToObject = new ConcurrentHashMap<>(); + + /** + * Register an object with a new generated UUID + * + * @param object the object to register + * @return the generated UUID + */ + public String registerObject(Object object) { + String existingId = objectToId.get(object); + if (existingId != null) { + return existingId; + } + + String newId = UUID.randomUUID().toString(); + objectToId.put(object, newId); + idToObject.put(newId, object); + return newId; + } + + /** + * Register an object with a specific ID (used when receiving remote objects) + * + * @param object the object to register + * @param objectId the specific ID to use + */ + public void registerObject(Object object, String objectId) { + objectToId.put(object, objectId); + idToObject.put(objectId, object); + } + + /** + * Get the ID for an object + * + * @param object the object + * @return the object's ID, or null if not registered + */ + public String getObjectId(Object object) { + return objectToId.get(object); + } + + /** + * Get the ID for an object, registering it if necessary + * + * @param object the object + * @return the object's ID + */ + public String getOrCreateObjectId(Object object) { + String id = objectToId.get(object); + if (id == null) { + id = registerObject(object); + } + return id; + } + + /** + * Get an object by its ID + * + * @param objectId the object ID + * @return the object, or null if not found + */ + public Object getObject(String objectId) { + return idToObject.get(objectId); + } + + /** + * Check if an object is registered + * + * @param object the object + * @return true if registered + */ + public boolean isRegistered(Object object) { + return objectToId.containsKey(object); + } + + /** + * Check if an ID is registered + * + * @param objectId the object ID + * @return true if registered + */ + public boolean hasObject(String objectId) { + return idToObject.containsKey(objectId); + } + + /** + * Unregister an object + * + * @param object the object to unregister + */ + public void unregisterObject(Object object) { + String id = objectToId.remove(object); + if (id != null) { + idToObject.remove(id); + } + } + + /** + * Unregister an object by ID + * + * @param objectId the object ID + */ + public void unregisterById(String objectId) { + Object object = idToObject.remove(objectId); + if (object != null) { + objectToId.remove(object); + } + } + + /** + * Clear all registrations + */ + public void clear() { + objectToId.clear(); + idToObject.clear(); + } + + /** + * Get the number of registered objects + * + * @return the count + */ + public int size() { + return objectToId.size(); + } + + /** + * Get all registered objects as a map from ID to object. + * Returns a copy of the internal map to prevent modification. + * + * @return a map of object ID to object + */ + public Map<String, Object> getAllObjects() { + return new ConcurrentHashMap<>(idToObject); + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java new file mode 100644 index 00000000..bdc972a1 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java @@ -0,0 +1,505 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import com.rabbitmq.client.*; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; +import java.util.concurrent.CopyOnWriteArrayList; +import java.util.concurrent.TimeoutException; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * RabbitMQ-based synchronization manager for PAMELA collaborative editing. + * Handles publishing operations to the message broker and consuming operations from other replicas. + * + * @author PAMELA Team + */ +public class RabbitMQSyncManager implements SyncManager, AutoCloseable { + + private static final Logger logger = Logger.getLogger(RabbitMQSyncManager.class.getName()); + + // RabbitMQ connection settings + private final String host; + private final int port; + private final String username; + private final String password; + private final String virtualHost; + private final boolean useSsl; + + // Exchange and queue configuration + private final String exchangeName; + private final String routingKey; + + // Unique identifier for this replica + private final String replicaId; + + // Vector clock for this replica + private final VectorClock vectorClock; + + // RabbitMQ connection and channel + private Connection connection; + private Channel publishChannel; + private Channel consumeChannel; + private String queueName; + + // Listeners for received operations + private final List<SyncOperationListener> listeners = new CopyOnWriteArrayList<>(); + + // Connection state + private volatile boolean connected = false; + private volatile boolean closing = false; + + /** + * Create a RabbitMQ sync manager with default settings + */ + public RabbitMQSyncManager() { + this("localhost", 5672, "guest", "guest", "/", "pamela.sync", "operations", false); + } + + /** + * Create a RabbitMQ sync manager with custom settings + */ + public RabbitMQSyncManager(String host, int port, String username, String password, + String virtualHost, String exchangeName, String routingKey, boolean useSsl) { + this.host = host; + this.port = port; + this.username = username; + this.password = password; + this.virtualHost = virtualHost; + this.exchangeName = exchangeName; + this.routingKey = routingKey; + this.useSsl = useSsl; + this.replicaId = UUID.randomUUID().toString(); + this.vectorClock = new VectorClock(); + } + + /** + * Get the unique replica identifier + */ + public String getReplicaId() { + return replicaId; + } + + /** + * Get the current vector clock + */ + public VectorClock getVectorClock() { + return vectorClock; + } + + /** + * Check if connected to RabbitMQ + */ + public boolean isConnected() { + return connected; + } + + /** + * Connect to RabbitMQ and start consuming messages + */ + public void connect() throws IOException, TimeoutException { + if (connected) { + logger.warning("Already connected to RabbitMQ"); + return; + } + + ConnectionFactory factory = new ConnectionFactory(); + factory.setHost(host); + factory.setPort(port); + factory.setUsername(username); + factory.setPassword(password); + factory.setVirtualHost(virtualHost); + + // Enable SSL if configured + if (useSsl) { + try { + factory.useSslProtocol(); + } catch (Exception e) { + throw new IOException("Failed to enable SSL", e); + } + } + + // Enable automatic recovery + factory.setAutomaticRecoveryEnabled(true); + factory.setNetworkRecoveryInterval(5000); + + connection = factory.newConnection("PAMELA-" + replicaId.substring(0, 8)); + + // Create channels for publishing and consuming + publishChannel = connection.createChannel(); + consumeChannel = connection.createChannel(); + + // Declare the fanout exchange for broadcast + publishChannel.exchangeDeclare(exchangeName, BuiltinExchangeType.FANOUT, true); + + // Create an exclusive queue for this replica + queueName = consumeChannel.queueDeclare().getQueue(); + consumeChannel.queueBind(queueName, exchangeName, routingKey); + + // Set up consumer + DeliverCallback deliverCallback = (consumerTag, delivery) -> { + if (closing) return; + + try { + SyncOperation operation = SyncOperationSerializer.deserializeFromBytes(delivery.getBody()); + + // Ignore operations from this replica + if (replicaId.equals(operation.getReplicaId())) { + return; + } + + // Handle STATE_REQUEST and STATE_RESPONSE specially + if (operation.getOperationType() == SyncOperation.OperationType.STATE_REQUEST) { + // Another replica is requesting state + notifyStateRequested(operation.getReplicaId()); + return; + } + + if (operation.getOperationType() == SyncOperation.OperationType.STATE_RESPONSE) { + // Check if this response is for us (targetReplicaId stored in propertyIdentifier) + String targetReplicaId = operation.getPropertyIdentifier(); + if (targetReplicaId == null || targetReplicaId.equals(replicaId)) { + notifyStateReceived(operation.getNewValueSerialized(), operation.getReplicaId()); + } + return; + } + + // Update our vector clock + if (operation.getVectorClock() != null) { + vectorClock.merge(operation.getVectorClock()); + } + + // Notify listeners + for (SyncOperationListener listener : listeners) { + try { + listener.onOperationReceived(operation); + } catch (Exception e) { + logger.log(Level.SEVERE, "Error in operation listener", e); + } + } + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to deserialize operation", e); + notifyError(e); + } + }; + + CancelCallback cancelCallback = consumerTag -> { + if (!closing) { + logger.warning("Consumer cancelled: " + consumerTag); + notifyDisconnected("Consumer cancelled"); + } + }; + + consumeChannel.basicConsume(queueName, true, deliverCallback, cancelCallback); + + connected = true; + logger.info("Connected to RabbitMQ at " + host + ":" + port + " as replica " + replicaId); + notifyConnected(); + } + + /** + * Publish a synchronization operation to all replicas + * + * @param operation the operation to publish + */ + @Override + public void publishOperation(SyncOperation operation) { + if (!connected) { + logger.warning("Cannot publish: not connected to RabbitMQ"); + return; + } + + try { + // Increment our vector clock + vectorClock.increment(replicaId); + + // Create a new operation with the updated vector clock + SyncOperation operationWithClock = new SyncOperation.Builder(operation.getOperationType()) + .operationId(operation.getOperationId()) + .timestamp(operation.getTimestamp()) + .replicaId(operation.getReplicaId()) + .objectId(operation.getObjectId()) + .entityType(operation.getEntityType()) + .propertyIdentifier(operation.getPropertyIdentifier()) + .oldValue(operation.getOldValueSerialized()) + .newValue(operation.getNewValueSerialized()) + .valueType(operation.getValueType()) + .index(operation.getIndex()) + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(operationWithClock); + + // Publish with persistent delivery mode + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) // persistent + .contentType("application/json") + .correlationId(operation.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + + logger.fine("Published operation: " + operation); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize operation", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish operation", e); + notifyError(e); + } + } + + /** + * Add a listener for synchronization operations + */ + public void addListener(SyncOperationListener listener) { + listeners.add(listener); + } + + /** + * Remove a listener + */ + public void removeListener(SyncOperationListener listener) { + listeners.remove(listener); + } + + /** + * Disconnect from RabbitMQ + */ + public void disconnect() { + if (!connected) { + return; + } + + closing = true; + + try { + if (consumeChannel != null && consumeChannel.isOpen()) { + consumeChannel.close(); + } + if (publishChannel != null && publishChannel.isOpen()) { + publishChannel.close(); + } + if (connection != null && connection.isOpen()) { + connection.close(); + } + } catch (IOException | TimeoutException e) { + logger.log(Level.WARNING, "Error during disconnect", e); + } + + connected = false; + closing = false; + logger.info("Disconnected from RabbitMQ"); + notifyDisconnected("Manual disconnect"); + } + + @Override + public void close() { + disconnect(); + } + + private void notifyConnected() { + for (SyncOperationListener listener : listeners) { + try { + listener.onConnected(); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in connection listener", e); + } + } + } + + private void notifyDisconnected(String reason) { + for (SyncOperationListener listener : listeners) { + try { + listener.onDisconnected(reason); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in disconnection listener", e); + } + } + } + + private void notifyError(Throwable error) { + for (SyncOperationListener listener : listeners) { + try { + listener.onError(error); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in error listener", e); + } + } + } + + private void notifyStateRequested(String requestingReplicaId) { + for (SyncOperationListener listener : listeners) { + try { + listener.onStateRequested(requestingReplicaId); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in state request listener", e); + } + } + } + + private void notifyStateReceived(String stateSnapshot, String fromReplicaId) { + for (SyncOperationListener listener : listeners) { + try { + listener.onStateReceived(stateSnapshot, fromReplicaId); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in state received listener", e); + } + } + } + + /** + * Request the current state from other replicas. + * Used when a new client joins and needs to synchronize. + */ + @Override + public void requestState() { + if (!connected) { + logger.warning("Cannot request state: not connected to RabbitMQ"); + return; + } + + try { + SyncOperation stateRequest = new SyncOperation.Builder(SyncOperation.OperationType.STATE_REQUEST) + .replicaId(replicaId) + .objectId("state-request") + .entityType("StateRequest") + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(stateRequest); + + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) + .contentType("application/json") + .correlationId(stateRequest.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + logger.info("Requested state from other replicas"); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize state request", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish state request", e); + notifyError(e); + } + } + + /** + * Send the current state as a response to a state request. + * + * @param stateSnapshot the serialized state snapshot + * @param targetReplicaId the replica that requested the state (optional, null for broadcast) + */ + @Override + public void sendStateResponse(String stateSnapshot, String targetReplicaId) { + if (!connected) { + logger.warning("Cannot send state response: not connected to RabbitMQ"); + return; + } + + try { + SyncOperation stateResponse = new SyncOperation.Builder(SyncOperation.OperationType.STATE_RESPONSE) + .replicaId(replicaId) + .objectId("state-response") + .entityType("StateResponse") + .propertyIdentifier(targetReplicaId) // Store target replica ID here + .newValue(stateSnapshot) + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(stateResponse); + + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) + .contentType("application/json") + .correlationId(stateResponse.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + logger.info("Sent state response to replica: " + (targetReplicaId != null ? targetReplicaId : "all")); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize state response", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish state response", e); + notifyError(e); + } + } + + /** + * Builder for creating RabbitMQSyncManager instances + */ + public static Builder builder() { + return new Builder(); + } + + public static class Builder { + private String host = "localhost"; + private int port = 5672; + private String username = "guest"; + private String password = "guest"; + private String virtualHost = "/"; + private String exchangeName = "pamela.sync"; + private String routingKey = "operations"; + private boolean useSsl = false; + + public Builder host(String host) { + this.host = host; + return this; + } + + public Builder port(int port) { + this.port = port; + return this; + } + + public Builder credentials(String username, String password) { + this.username = username; + this.password = password; + return this; + } + + public Builder virtualHost(String virtualHost) { + this.virtualHost = virtualHost; + return this; + } + + public Builder exchangeName(String exchangeName) { + this.exchangeName = exchangeName; + return this; + } + + public Builder routingKey(String routingKey) { + this.routingKey = routingKey; + return this; + } + + public Builder useSsl(boolean useSsl) { + this.useSsl = useSsl; + return this; + } + + public RabbitMQSyncManager build() { + return new RabbitMQSyncManager(host, port, username, password, virtualHost, exchangeName, routingKey, useSsl); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java new file mode 100644 index 00000000..7f6f3fbd --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -0,0 +1,1054 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import org.openflexo.pamela.factory.EditingContextImpl; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.factory.ProxyMethodHandler; +import org.openflexo.pamela.model.ModelProperty; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * Synchronized editing context that broadcasts PAMELA operations via RabbitMQ. + * This class extends the standard EditingContext to add real-time collaborative + * synchronization capabilities. + * + * @author PAMELA Team + */ +public class SyncEditingContext extends EditingContextImpl implements SyncOperationListener { + + private static final Logger logger = Logger.getLogger(SyncEditingContext.class.getName()); + + private SyncManager syncManager; + private final ObjectIdentityManager identityManager; + private final SyncValueSerializer valueSerializer; + private PamelaModelFactory modelFactory; + + // Flag to prevent recursive sync when applying remote operations + private final ThreadLocal<Boolean> applyingRemoteOperation = ThreadLocal.withInitial(() -> false); + + // Buffer for operations during object creation (ensures CREATE is sent before SETs) + // Key: objectId, Value: list of buffered operations + private final Map<String, List<SyncOperation>> pendingOperations = new ConcurrentHashMap<>(); + + // Track objects for which CREATE has been sent (by objectId) + private final Map<String, Boolean> createdObjects = new ConcurrentHashMap<>(); + + // Flag to automatically request state from other replicas on connection + private boolean autoRequestStateOnConnect = false; + + // Flag to track if state has been received (to avoid multiple requests) + private volatile boolean stateReceived = false; + + /** + * Create a synchronized editing context without a sync manager. + * Call setSyncManager() to set one later. + */ + public SyncEditingContext() { + super(); + this.syncManager = null; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + } + + /** + * Create a synchronized editing context with a PamelaModelFactory. + * Call setSyncManager() to set a sync manager later. + */ + public SyncEditingContext(PamelaModelFactory modelFactory) { + super(); + this.modelFactory = modelFactory; + this.syncManager = null; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + } + + /** + * Create a synchronized editing context with custom sync manager + */ + public SyncEditingContext(SyncManager syncManager) { + super(); + this.syncManager = syncManager; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + if (this.syncManager != null) { + this.syncManager.addListener(this); + } + } + + /** + * Set the model factory for this context + */ + public void setModelFactory(PamelaModelFactory modelFactory) { + this.modelFactory = modelFactory; + } + + /** + * Get the sync manager + */ + public SyncManager getSyncManager() { + return syncManager; + } + + /** + * Set the sync manager + */ + public void setSyncManager(SyncManager syncManager) { + this.syncManager = syncManager; + if (this.syncManager != null) { + this.syncManager.addListener(this); + } + } + + /** + * Get the identity manager + */ + public ObjectIdentityManager getIdentityManager() { + return identityManager; + } + + /** + * Get the replica ID + */ + public String getReplicaId() { + return syncManager != null ? syncManager.getReplicaId() : null; + } + + /** + * Check if currently applying a remote operation + */ + public boolean isApplyingRemoteOperation() { + return applyingRemoteOperation.get(); + } + + /** + * Get the interface name for a PAMELA object. + * Returns the implemented interface name (e.g., "org.example.Book") instead of + * the proxy class name (e.g., "Book$BookImpl_$$_jvst806_1"). + */ + private <I> String getEntityTypeName(I object) { + if (modelFactory != null && modelFactory.isProxyObject(object)) { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + return handler.getModelEntity().getImplementedInterface().getName(); + } + } + return object.getClass().getName(); + } + + /** + * Broadcast a SET operation + */ + public <I> void broadcastSet(I object, ModelProperty<? super I> property, Object oldValue, Object newValue) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.SET) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .oldValue(valueSerializer.serialize(oldValue)) + .newValue(valueSerializer.serialize(newValue)) + .valueType(property.getType().getName()) + .build(); + + // Check if CREATE has been sent for this object - if not, buffer the operation + if (!createdObjects.containsKey(objectId)) { + // Buffer the operation to be sent after CREATE + pendingOperations.computeIfAbsent(objectId, k -> new ArrayList<>()).add(operation); + logger.fine("Buffered SET operation for object not yet created: " + objectId); + } else { + syncManager.publishOperation(operation); + } + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast SET operation", e); + } + } + + /** + * Broadcast an ADD operation + */ + public <I> void broadcastAdd(I object, ModelProperty<? super I> property, Object addedValue, int index) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + // For PAMELA objects, use reference serialization + String serializedValue; + if (addedValue != null && modelFactory != null && modelFactory.isProxyObject(addedValue)) { + // Ensure added object is registered and use reference + identityManager.getOrCreateObjectId(addedValue); + serializedValue = valueSerializer.serializeReference(addedValue, identityManager); + } else { + serializedValue = valueSerializer.serialize(addedValue); + } + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.ADD) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .newValue(serializedValue) + .valueType(property.getType().getName()) + .index(index) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast ADD operation", e); + } + } + + /** + * Broadcast a REMOVE operation + */ + public <I> void broadcastRemove(I object, ModelProperty<? super I> property, Object removedValue) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + // For PAMELA objects, use reference serialization + String serializedValue; + if (removedValue != null && modelFactory != null && modelFactory.isProxyObject(removedValue)) { + serializedValue = valueSerializer.serializeReference(removedValue, identityManager); + } else { + serializedValue = valueSerializer.serialize(removedValue); + } + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.REMOVE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .oldValue(serializedValue) + .valueType(property.getType().getName()) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast REMOVE operation", e); + } + } + + /** + * Broadcast a CREATE operation + */ + public <I> void broadcastCreate(I object, String entityType) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.CREATE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .build(); + + // Send CREATE first + syncManager.publishOperation(operation); + + // Mark object as created + createdObjects.put(objectId, Boolean.TRUE); + + // Then send any buffered operations for this object + List<SyncOperation> buffered = pendingOperations.remove(objectId); + if (buffered != null) { + for (SyncOperation bufferedOp : buffered) { + syncManager.publishOperation(bufferedOp); + } + logger.fine("Sent " + buffered.size() + " buffered operations for: " + objectId); + } + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast CREATE operation", e); + } + } + + /** + * Broadcast a DELETE operation + */ + public <I> void broadcastDelete(I object) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getObjectId(object); + if (objectId == null) { + logger.warning("Cannot broadcast delete for unregistered object"); + return; + } + + String entityType = getEntityTypeName(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.DELETE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast DELETE operation", e); + } + } + + // SyncOperationListener implementation + + @Override + public void onOperationReceived(SyncOperation operation) { + logger.info(">>> Received operation: " + operation.getOperationType() + + " objectId=" + operation.getObjectId() + + " property=" + operation.getPropertyIdentifier()); + + if (modelFactory == null) { + logger.warning("ModelFactory not set, cannot apply remote operation"); + return; + } + + applyingRemoteOperation.set(true); + try { + switch (operation.getOperationType()) { + case SET: + applyRemoteSet(operation); + break; + case ADD: + applyRemoteAdd(operation); + break; + case REMOVE: + applyRemoteRemove(operation); + break; + case CREATE: + applyRemoteCreate(operation); + break; + case DELETE: + applyRemoteDelete(operation); + break; + default: + logger.warning("Unknown operation type: " + operation.getOperationType()); + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote operation: " + operation, e); + } finally { + applyingRemoteOperation.set(false); + } + } + + @Override + public void onConnected() { + logger.info("Sync connected as replica: " + syncManager.getReplicaId()); + + // Automatically request state from other replicas if enabled + if (autoRequestStateOnConnect && !stateReceived) { + logger.info("Automatically requesting state from other replicas..."); + requestStateSync(); + } + } + + @Override + public void onDisconnected(String reason) { + logger.info("Sync disconnected: " + reason); + } + + @Override + public void onError(Throwable error) { + logger.log(Level.SEVERE, "Sync error", error); + } + + @Override + public void onStateRequested(String requestingReplicaId) { + logger.info("State requested by replica: " + requestingReplicaId); + if (syncManager == null) { + return; + } + + try { + String stateSnapshot = serializeCurrentState(); + syncManager.sendStateResponse(stateSnapshot, requestingReplicaId); + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to send state response", e); + } + } + + @Override + public void onStateReceived(String stateSnapshot, String fromReplicaId) { + logger.info("State received from replica: " + fromReplicaId); + + // Mark state as received to prevent duplicate requests + stateReceived = true; + + try { + restoreFromSnapshot(stateSnapshot); + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to restore from snapshot", e); + } + } + + /** + * Enable or disable automatic state request on connection. + * When enabled, the context will automatically request state from other replicas + * upon connecting to the sync manager. + * + * @param autoRequest true to enable automatic state request + */ + public void setAutoRequestStateOnConnect(boolean autoRequest) { + this.autoRequestStateOnConnect = autoRequest; + } + + /** + * Check if automatic state request on connect is enabled. + * + * @return true if enabled + */ + public boolean isAutoRequestStateOnConnect() { + return autoRequestStateOnConnect; + } + + /** + * Check if state has been received from another replica. + * + * @return true if state was received + */ + public boolean isStateReceived() { + return stateReceived; + } + + /** + * Request state from other replicas. + * Call this when a new client joins to get the current state. + */ + public void requestStateSync() { + if (syncManager != null && syncManager.isConnected()) { + syncManager.requestState(); + } + } + + /** + * Serialize the current state of all tracked objects into a snapshot. + * + * @return JSON string containing all objects and their properties + */ + public String serializeCurrentState() { + StringBuilder json = new StringBuilder(); + json.append("{\"objects\":["); + + Map<String, Object> allObjects = identityManager.getAllObjects(); + boolean first = true; + + for (Map.Entry<String, Object> entry : allObjects.entrySet()) { + String objectId = entry.getKey(); + Object object = entry.getValue(); + + if (!first) { + json.append(","); + } + first = false; + + json.append("{"); + json.append("\"id\":\"").append(escapeJson(objectId)).append("\","); + json.append("\"type\":\"").append(escapeJson(getEntityTypeName(object))).append("\","); + json.append("\"properties\":{"); + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + boolean firstProp = true; + java.util.Iterator<? extends ModelProperty<?>> propIterator = handler.getModelEntity().getProperties(); + while (propIterator.hasNext()) { + ModelProperty<?> property = propIterator.next(); + if (property.getGetter() != null) { + Object value = handler.invokeGetter(property.getPropertyIdentifier()); + if (value != null) { + if (!firstProp) { + json.append(","); + } + firstProp = false; + + String serializedValue; + if (modelFactory.isProxyObject(value)) { + serializedValue = valueSerializer.serializeReference(value, identityManager); + } else if (value instanceof List) { + serializedValue = serializeList((List<?>) value); + } else { + serializedValue = valueSerializer.serialize(value); + } + + json.append("\"").append(escapeJson(property.getPropertyIdentifier())).append("\":"); + json.append("\"").append(escapeJson(serializedValue)).append("\""); + } + } + } + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to serialize object: " + objectId, e); + } + + json.append("}}"); + } + + json.append("]}"); + return json.toString(); + } + + /** + * Restore the local state from a snapshot received from another replica. + * + * @param stateSnapshot JSON string containing the state snapshot + */ + public void restoreFromSnapshot(String stateSnapshot) { + if (stateSnapshot == null || stateSnapshot.isEmpty()) { + logger.warning("Empty state snapshot received"); + return; + } + + applyingRemoteOperation.set(true); + try { + // Simple JSON parsing for the snapshot format + // Format: {"objects":[{"id":"...","type":"...","properties":{...}}, ...]} + + int objectsStart = stateSnapshot.indexOf("["); + int objectsEnd = stateSnapshot.lastIndexOf("]"); + if (objectsStart < 0 || objectsEnd < 0) { + logger.warning("Invalid snapshot format"); + return; + } + + String objectsJson = stateSnapshot.substring(objectsStart + 1, objectsEnd); + if (objectsJson.trim().isEmpty()) { + logger.info("Empty state snapshot - no objects to restore"); + return; + } + + // Parse each object + List<ObjectSnapshot> snapshots = parseObjectSnapshots(objectsJson); + + // First pass: create all objects + for (ObjectSnapshot snapshot : snapshots) { + if (!identityManager.hasObject(snapshot.id)) { + try { + Class<?> entityClass = Class.forName(snapshot.type); + Object newObject = modelFactory._newInstance(entityClass, false); + + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + identityManager.registerObject(newObject, snapshot.id); + createdObjects.put(snapshot.id, Boolean.TRUE); + logger.fine("Created object from snapshot: " + snapshot.id); + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to create object from snapshot: " + snapshot.id, e); + } + } + } + + // Second pass: set properties (after all objects exist for reference resolution) + for (ObjectSnapshot snapshot : snapshots) { + Object object = identityManager.getObject(snapshot.id); + if (object == null) { + continue; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + for (Map.Entry<String, String> prop : snapshot.properties.entrySet()) { + try { + ModelProperty<?> modelProperty = handler.getModelEntity().getModelProperty(prop.getKey()); + if (modelProperty != null) { + String serializedValue = prop.getValue(); + + // Handle list properties specially + if (serializedValue.startsWith("[") && serializedValue.endsWith("]")) { + // It's a list - use adder for each element + restoreListProperty(handler, modelProperty, serializedValue); + } else { + Object value = valueSerializer.deserialize(serializedValue, modelProperty.getType(), this); + handler.invokeSetter(prop.getKey(), value); + } + } + } catch (Exception e) { + logger.log(Level.FINE, "Failed to set property: " + prop.getKey(), e); + } + } + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to restore object properties: " + snapshot.id, e); + } + } + + logger.info("Restored " + snapshots.size() + " objects from snapshot"); + + } finally { + applyingRemoteOperation.set(false); + } + } + + /** + * Restore a list property from serialized format using adder method. + */ + private void restoreListProperty(ProxyMethodHandler<?> handler, ModelProperty<?> property, String serializedList) { + // Remove brackets: [item1,item2,item3] -> item1,item2,item3 + String content = serializedList.substring(1, serializedList.length() - 1); + if (content.trim().isEmpty()) { + return; // Empty list + } + + // Split by comma (careful with nested structures) + List<String> items = splitListItems(content); + + for (String item : items) { + item = item.trim(); + if (item.isEmpty()) { + continue; + } + + try { + // Deserialize the item + Object value = valueSerializer.deserialize(item, property.getType(), this); + if (value != null) { + // Use adder to add to the list + handler.invokeAdder(property.getPropertyIdentifier(), value); + logger.fine("Added item to list property " + property.getPropertyIdentifier() + ": " + value); + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to add item to list: " + item, e); + } + } + } + + /** + * Split list items by comma, handling nested structures. + */ + private List<String> splitListItems(String content) { + List<String> items = new ArrayList<>(); + int depth = 0; + StringBuilder current = new StringBuilder(); + + for (int i = 0; i < content.length(); i++) { + char c = content.charAt(i); + if (c == '[' || c == '{') { + depth++; + current.append(c); + } else if (c == ']' || c == '}') { + depth--; + current.append(c); + } else if (c == ',' && depth == 0) { + items.add(current.toString()); + current = new StringBuilder(); + } else { + current.append(c); + } + } + + if (current.length() > 0) { + items.add(current.toString()); + } + + return items; + } + + private String serializeList(List<?> list) { + StringBuilder sb = new StringBuilder("["); + boolean first = true; + for (Object item : list) { + if (!first) { + sb.append(","); + } + first = false; + + if (item != null && modelFactory != null && modelFactory.isProxyObject(item)) { + sb.append(valueSerializer.serializeReference(item, identityManager)); + } else { + sb.append(valueSerializer.serialize(item)); + } + } + sb.append("]"); + return sb.toString(); + } + + private String escapeJson(String value) { + if (value == null) return ""; + return value.replace("\\", "\\\\") + .replace("\"", "\\\"") + .replace("\n", "\\n") + .replace("\r", "\\r") + .replace("\t", "\\t"); + } + + private static class ObjectSnapshot { + String id; + String type; + Map<String, String> properties = new java.util.HashMap<>(); + } + + private List<ObjectSnapshot> parseObjectSnapshots(String objectsJson) { + List<ObjectSnapshot> snapshots = new ArrayList<>(); + + // Simple parsing - find each object block + int depth = 0; + int objectStart = -1; + + for (int i = 0; i < objectsJson.length(); i++) { + char c = objectsJson.charAt(i); + if (c == '{') { + if (depth == 0) { + objectStart = i; + } + depth++; + } else if (c == '}') { + depth--; + if (depth == 0 && objectStart >= 0) { + String objectJson = objectsJson.substring(objectStart, i + 1); + ObjectSnapshot snapshot = parseObjectSnapshot(objectJson); + if (snapshot != null) { + snapshots.add(snapshot); + } + objectStart = -1; + } + } + } + + return snapshots; + } + + private ObjectSnapshot parseObjectSnapshot(String objectJson) { + ObjectSnapshot snapshot = new ObjectSnapshot(); + + // Extract id + snapshot.id = extractJsonValue(objectJson, "id"); + snapshot.type = extractJsonValue(objectJson, "type"); + + if (snapshot.id == null || snapshot.type == null) { + return null; + } + + // Extract properties block + int propsStart = objectJson.indexOf("\"properties\":{"); + if (propsStart >= 0) { + propsStart += 14; // length of "properties":{ + int propsEnd = findMatchingBrace(objectJson, propsStart - 1); + if (propsEnd > propsStart) { + String propsJson = objectJson.substring(propsStart, propsEnd); + parseProperties(propsJson, snapshot.properties); + } + } + + return snapshot; + } + + private String extractJsonValue(String json, String key) { + String pattern = "\"" + key + "\":\""; + int start = json.indexOf(pattern); + if (start < 0) return null; + start += pattern.length(); + + int end = start; + while (end < json.length()) { + char c = json.charAt(end); + if (c == '"' && json.charAt(end - 1) != '\\') { + break; + } + end++; + } + + if (end > start) { + return unescapeJson(json.substring(start, end)); + } + return null; + } + + private int findMatchingBrace(String json, int openPos) { + int depth = 0; + for (int i = openPos; i < json.length(); i++) { + char c = json.charAt(i); + if (c == '{') depth++; + else if (c == '}') { + depth--; + if (depth == 0) return i; + } + } + return -1; + } + + private void parseProperties(String propsJson, Map<String, String> properties) { + // Simple key-value parsing for "key":"value" pairs + int i = 0; + while (i < propsJson.length()) { + // Find key start + int keyStart = propsJson.indexOf('"', i); + if (keyStart < 0) break; + keyStart++; + + int keyEnd = propsJson.indexOf('"', keyStart); + if (keyEnd < 0) break; + + String key = propsJson.substring(keyStart, keyEnd); + + // Find value after ":" + int colonPos = propsJson.indexOf(':', keyEnd); + if (colonPos < 0) break; + + int valueStart = propsJson.indexOf('"', colonPos); + if (valueStart < 0) break; + valueStart++; + + int valueEnd = valueStart; + while (valueEnd < propsJson.length()) { + char c = propsJson.charAt(valueEnd); + if (c == '"' && propsJson.charAt(valueEnd - 1) != '\\') { + break; + } + valueEnd++; + } + + if (valueEnd > valueStart) { + properties.put(key, unescapeJson(propsJson.substring(valueStart, valueEnd))); + } + + i = valueEnd + 1; + } + } + + private String unescapeJson(String value) { + return value.replace("\\\"", "\"") + .replace("\\\\", "\\") + .replace("\\n", "\n") + .replace("\\r", "\r") + .replace("\\t", "\t"); + } + + // Private methods for applying remote operations + + private void applyRemoteSet(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + // Object doesn't exist yet - try to create it first + // This can happen if SET arrives before CREATE due to message ordering + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); + if (target == null) { + logger.warning("Target object not found for SET: " + operation.getObjectId()); + return; + } + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object newValue = valueSerializer.deserialize( + operation.getNewValueSerialized(), + property.getType(), + this + ); + handler.invokeSetter(operation.getPropertyIdentifier(), newValue); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote SET", e); + } + } + + private void applyRemoteAdd(SyncOperation operation) { + logger.info("Applying remote ADD: objectId=" + operation.getObjectId() + + " property=" + operation.getPropertyIdentifier() + + " value=" + operation.getNewValueSerialized()); + + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + // Object doesn't exist yet - try to create it first + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); + if (target == null) { + logger.warning("Target object not found for ADD: " + operation.getObjectId()); + return; + } + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object value = valueSerializer.deserialize( + operation.getNewValueSerialized(), + property.getType(), + this + ); + logger.info("Deserialized value for ADD: " + value + " (type=" + (value != null ? value.getClass().getName() : "null") + ")"); + // Use property identifier string + handler.invokeAdder(operation.getPropertyIdentifier(), value); + logger.info("Successfully added to collection"); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote ADD", e); + } + } + + private void applyRemoteRemove(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + logger.warning("Target object not found for REMOVE: " + operation.getObjectId()); + return; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object value = valueSerializer.deserialize( + operation.getOldValueSerialized(), + property.getType(), + this + ); + handler.invokeRemover(operation.getPropertyIdentifier(), value); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote REMOVE", e); + } + } + + private void applyRemoteCreate(SyncOperation operation) { + // Check if object already exists + if (identityManager.hasObject(operation.getObjectId())) { + logger.fine("Object already exists: " + operation.getObjectId()); + return; + } + + try { + // Load the entity class + Class<?> entityClass = Class.forName(operation.getEntityType()); + + // Create a new instance using _newInstance (like deserialization does) + // This creates the object without requiring the initializer + Object newObject = modelFactory._newInstance(entityClass, false); + + // Mark the object as deserializing so it can receive property updates + // without failing the "uninitialized" check + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + // Register with the specified ID + identityManager.registerObject(newObject, operation.getObjectId()); + + // Mark as known so SET operations work properly + createdObjects.put(operation.getObjectId(), Boolean.TRUE); + + logger.fine("Created remote object: " + operation.getObjectId()); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote CREATE", e); + } + } + + private void applyRemoteDelete(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + logger.fine("Object already deleted or not found: " + operation.getObjectId()); + return; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + handler.invokeDeleter(target); + } + + identityManager.unregisterById(operation.getObjectId()); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote DELETE", e); + } + } + + /** + * Ensure a remote object exists, creating it if necessary. + * This handles the case where operations arrive out of order. + * + * @param objectId the object ID + * @param entityType the entity class name + * @return the object, or null if creation failed + */ + private Object ensureRemoteObjectExists(String objectId, String entityType) { + // Check again if it exists now + Object existing = identityManager.getObject(objectId); + if (existing != null) { + return existing; + } + + if (entityType == null) { + logger.warning("Cannot create object without entityType for ID: " + objectId); + return null; + } + + try { + Class<?> entityClass = Class.forName(entityType); + + // Create using _newInstance (bypasses initializer requirement) + Object newObject = modelFactory._newInstance(entityClass, false); + + // Mark as deserializing to allow setters without initialization + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + // Register with the specified ID + identityManager.registerObject(newObject, objectId); + + // Mark as known so SET operations work properly + createdObjects.put(objectId, Boolean.TRUE); + + logger.fine("Auto-created remote object: " + objectId); + return newObject; + + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to auto-create remote object: " + objectId, e); + return null; + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java new file mode 100644 index 00000000..745a4e3a --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java @@ -0,0 +1,80 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.sync; + +/** + * Interface for synchronization managers that handle the transport layer + * for PAMELA collaborative synchronization. + * + * Implementations can use different messaging systems like RabbitMQ, Redis, + * WebSockets, or any other pub/sub mechanism. + * + * @author PAMELA Sync + */ +public interface SyncManager { + + /** + * Publishes a synchronization operation to all other replicas. + * + * @param operation the operation to publish + */ + void publishOperation(SyncOperation operation); + + /** + * Adds a listener to receive operations from other replicas. + * + * @param listener the listener to add + */ + void addListener(SyncOperationListener listener); + + /** + * Removes a previously registered listener. + * + * @param listener the listener to remove + */ + void removeListener(SyncOperationListener listener); + + /** + * Returns whether this sync manager is currently connected to the messaging system. + * + * @return true if connected, false otherwise + */ + boolean isConnected(); + + /** + * Returns the unique identifier of this replica. + * + * @return the replica ID + */ + String getReplicaId(); + + /** + * Requests the current state from other replicas. + * Used when a new client joins and needs to synchronize. + */ + default void requestState() { + // Default implementation does nothing + } + + /** + * Sends the current state as a response to a state request. + * + * @param stateSnapshot the serialized state snapshot + * @param targetReplicaId the replica that requested the state (optional, null for broadcast) + */ + default void sendStateResponse(String stateSnapshot, String targetReplicaId) { + // Default implementation does nothing + } + +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java new file mode 100644 index 00000000..accb3e31 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java @@ -0,0 +1,230 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.io.Serializable; +import java.util.UUID; + +/** + * Represents a synchronization operation that can be shared between PAMELA instances + * via RabbitMQ for collaborative real-time editing. + * + * @author PAMELA Team + */ +public class SyncOperation implements Serializable { + + private static final long serialVersionUID = 1L; + + /** + * Types of operations that can be synchronized + */ + public enum OperationType { + CREATE, + DELETE, + SET, + ADD, + REMOVE, + REINDEX, + STATE_REQUEST, + STATE_RESPONSE + } + + // Operation identification + private final String operationId; + private final OperationType operationType; + private final long timestamp; + private final String replicaId; + + // Target object information + private final String objectId; + private final String entityType; + + // Property information (for SET, ADD, REMOVE, REINDEX) + private final String propertyIdentifier; + + // Value information + private final String oldValueSerialized; + private final String newValueSerialized; + private final String valueType; + + // For list operations + private final int index; + + // Vector clock for causality tracking + private final VectorClock vectorClock; + + private SyncOperation(Builder builder) { + this.operationId = builder.operationId != null ? builder.operationId : UUID.randomUUID().toString(); + this.operationType = builder.operationType; + this.timestamp = builder.timestamp > 0 ? builder.timestamp : System.currentTimeMillis(); + this.replicaId = builder.replicaId; + this.objectId = builder.objectId; + this.entityType = builder.entityType; + this.propertyIdentifier = builder.propertyIdentifier; + this.oldValueSerialized = builder.oldValueSerialized; + this.newValueSerialized = builder.newValueSerialized; + this.valueType = builder.valueType; + this.index = builder.index; + this.vectorClock = builder.vectorClock; + } + + // Getters + public String getOperationId() { + return operationId; + } + + public OperationType getOperationType() { + return operationType; + } + + public long getTimestamp() { + return timestamp; + } + + public String getReplicaId() { + return replicaId; + } + + public String getObjectId() { + return objectId; + } + + public String getEntityType() { + return entityType; + } + + public String getPropertyIdentifier() { + return propertyIdentifier; + } + + public String getOldValueSerialized() { + return oldValueSerialized; + } + + public String getNewValueSerialized() { + return newValueSerialized; + } + + public String getValueType() { + return valueType; + } + + public int getIndex() { + return index; + } + + public VectorClock getVectorClock() { + return vectorClock; + } + + @Override + public String toString() { + return "SyncOperation{" + + "type=" + operationType + + ", objectId='" + objectId + '\'' + + ", property='" + propertyIdentifier + '\'' + + ", replica='" + replicaId + '\'' + + '}'; + } + + /** + * Builder for creating SyncOperation instances + */ + public static class Builder { + private String operationId; + private OperationType operationType; + private long timestamp; + private String replicaId; + private String objectId; + private String entityType; + private String propertyIdentifier; + private String oldValueSerialized; + private String newValueSerialized; + private String valueType; + private int index = -1; + private VectorClock vectorClock; + + public Builder(OperationType operationType) { + this.operationType = operationType; + } + + public Builder operationId(String operationId) { + this.operationId = operationId; + return this; + } + + public Builder timestamp(long timestamp) { + this.timestamp = timestamp; + return this; + } + + public Builder replicaId(String replicaId) { + this.replicaId = replicaId; + return this; + } + + public Builder objectId(String objectId) { + this.objectId = objectId; + return this; + } + + public Builder entityType(String entityType) { + this.entityType = entityType; + return this; + } + + public Builder propertyIdentifier(String propertyIdentifier) { + this.propertyIdentifier = propertyIdentifier; + return this; + } + + public Builder oldValue(String oldValueSerialized) { + this.oldValueSerialized = oldValueSerialized; + return this; + } + + public Builder newValue(String newValueSerialized) { + this.newValueSerialized = newValueSerialized; + return this; + } + + public Builder valueType(String valueType) { + this.valueType = valueType; + return this; + } + + public Builder index(int index) { + this.index = index; + return this; + } + + public Builder vectorClock(VectorClock vectorClock) { + this.vectorClock = vectorClock; + return this; + } + + public SyncOperation build() { + if (operationType == null) { + throw new IllegalStateException("Operation type is required"); + } + if (replicaId == null) { + throw new IllegalStateException("Replica ID is required"); + } + if (objectId == null) { + throw new IllegalStateException("Object ID is required"); + } + return new SyncOperation(this); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java new file mode 100644 index 00000000..7db324e7 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java @@ -0,0 +1,71 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +/** + * Listener interface for receiving synchronization operations from remote replicas. + * Implementations handle the application of remote operations to the local model. + * + * @author PAMELA Team + */ +public interface SyncOperationListener { + + /** + * Called when a synchronization operation is received from a remote replica + * + * @param operation the received operation + */ + void onOperationReceived(SyncOperation operation); + + /** + * Called when the synchronization connection is established + */ + default void onConnected() { + } + + /** + * Called when the synchronization connection is lost + * + * @param reason the reason for disconnection + */ + default void onDisconnected(String reason) { + } + + /** + * Called when a synchronization error occurs + * + * @param error the error that occurred + */ + default void onError(Throwable error) { + } + + /** + * Called when a state request is received from a new replica. + * The listener should respond by sending the current state. + * + * @param requestingReplicaId the ID of the replica requesting state + */ + default void onStateRequested(String requestingReplicaId) { + } + + /** + * Called when a state snapshot is received from another replica. + * The listener should restore the local state from the snapshot. + * + * @param stateSnapshot the serialized state snapshot + * @param fromReplicaId the ID of the replica that sent the state + */ + default void onStateReceived(String stateSnapshot, String fromReplicaId) { + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java new file mode 100644 index 00000000..c1ac7a84 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java @@ -0,0 +1,176 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.databind.ObjectMapper; + +/** + * Serializer for SyncOperation objects. + * Handles conversion to/from JSON for transmission over RabbitMQ. + * + * @author PAMELA Team + */ +public class SyncOperationSerializer { + + private static final ObjectMapper objectMapper = new ObjectMapper(); + + /** + * Serialize a SyncOperation to JSON string + * + * @param operation the operation to serialize + * @return JSON string representation + * @throws SyncSerializationException if serialization fails + */ + public static String serialize(SyncOperation operation) throws SyncSerializationException { + try { + return objectMapper.writeValueAsString(new SyncOperationDTO(operation)); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to serialize SyncOperation", e); + } + } + + /** + * Deserialize a JSON string to SyncOperation + * + * @param json the JSON string + * @return the deserialized SyncOperation + * @throws SyncSerializationException if deserialization fails + */ + public static SyncOperation deserialize(String json) throws SyncSerializationException { + try { + SyncOperationDTO dto = objectMapper.readValue(json, SyncOperationDTO.class); + return dto.toSyncOperation(); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to deserialize SyncOperation", e); + } + } + + /** + * Serialize a SyncOperation to byte array + * + * @param operation the operation to serialize + * @return byte array representation + * @throws SyncSerializationException if serialization fails + */ + public static byte[] serializeToBytes(SyncOperation operation) throws SyncSerializationException { + try { + return objectMapper.writeValueAsBytes(new SyncOperationDTO(operation)); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to serialize SyncOperation to bytes", e); + } + } + + /** + * Deserialize a byte array to SyncOperation + * + * @param bytes the byte array + * @return the deserialized SyncOperation + * @throws SyncSerializationException if deserialization fails + */ + public static SyncOperation deserializeFromBytes(byte[] bytes) throws SyncSerializationException { + try { + SyncOperationDTO dto = objectMapper.readValue(bytes, SyncOperationDTO.class); + return dto.toSyncOperation(); + } catch (Exception e) { + throw new SyncSerializationException("Failed to deserialize SyncOperation from bytes", e); + } + } + + /** + * DTO class for JSON serialization + */ + public static class SyncOperationDTO { + public String operationId; + public String operationType; + public long timestamp; + public String replicaId; + public String objectId; + public String entityType; + public String propertyIdentifier; + public String oldValueSerialized; + public String newValueSerialized; + public String valueType; + public int index; + public VectorClockDTO vectorClock; + + public SyncOperationDTO() { + } + + public SyncOperationDTO(SyncOperation op) { + this.operationId = op.getOperationId(); + this.operationType = op.getOperationType().name(); + this.timestamp = op.getTimestamp(); + this.replicaId = op.getReplicaId(); + this.objectId = op.getObjectId(); + this.entityType = op.getEntityType(); + this.propertyIdentifier = op.getPropertyIdentifier(); + this.oldValueSerialized = op.getOldValueSerialized(); + this.newValueSerialized = op.getNewValueSerialized(); + this.valueType = op.getValueType(); + this.index = op.getIndex(); + if (op.getVectorClock() != null) { + this.vectorClock = new VectorClockDTO(op.getVectorClock()); + } + } + + public SyncOperation toSyncOperation() { + VectorClock vc = null; + if (vectorClock != null) { + vc = vectorClock.toVectorClock(); + } + + return new SyncOperation.Builder(SyncOperation.OperationType.valueOf(operationType)) + .operationId(operationId) + .timestamp(timestamp) + .replicaId(replicaId) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(propertyIdentifier) + .oldValue(oldValueSerialized) + .newValue(newValueSerialized) + .valueType(valueType) + .index(index) + .vectorClock(vc) + .build(); + } + } + + /** + * DTO class for VectorClock JSON serialization + */ + public static class VectorClockDTO { + public java.util.Map<String, Long> clock; + + public VectorClockDTO() { + } + + public VectorClockDTO(VectorClock vc) { + this.clock = vc.getClockMap(); + } + + public VectorClock toVectorClock() { + return new VectorClock(clock != null ? clock : new java.util.HashMap<>()); + } + } + + /** + * Exception for serialization errors + */ + public static class SyncSerializationException extends Exception { + public SyncSerializationException(String message, Throwable cause) { + super(message, cause); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java new file mode 100644 index 00000000..48c35380 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java @@ -0,0 +1,182 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * Serializer for property values in sync operations. + * Handles conversion of PAMELA property values to/from string representation + * for transmission over RabbitMQ. + * + * @author PAMELA Team + */ +public class SyncValueSerializer { + + private static final Logger logger = Logger.getLogger(SyncValueSerializer.class.getName()); + + // Special markers for null and object references + private static final String NULL_MARKER = "__NULL__"; + private static final String OBJECT_REF_PREFIX = "__REF__:"; + + /** + * Serialize a value to string representation + * + * @param value the value to serialize + * @return string representation + */ + public String serialize(Object value) { + if (value == null) { + return NULL_MARKER; + } + + // Handle primitive types and common types + if (value instanceof String) { + return (String) value; + } + + if (value instanceof Number || value instanceof Boolean) { + return value.toString(); + } + + if (value instanceof Enum) { + return ((Enum<?>) value).name(); + } + + // Handle PAMELA objects by reference + // This requires the object to be registered in the identity manager + // For now, we'll use toString() and hope for the best + // A more robust solution would check if it's a proxy object + + return value.toString(); + } + + /** + * Serialize a PAMELA object reference + * + * @param object the PAMELA object + * @param identityManager the identity manager to get the object ID + * @return reference string + */ + public String serializeReference(Object object, ObjectIdentityManager identityManager) { + if (object == null) { + return NULL_MARKER; + } + + String objectId = identityManager.getObjectId(object); + if (objectId != null) { + return OBJECT_REF_PREFIX + objectId; + } + + // Not a registered object, serialize as string + return serialize(object); + } + + /** + * Deserialize a string representation to a value + * + * @param serialized the serialized string + * @param targetType the expected type + * @param syncContext the sync context for resolving object references + * @return the deserialized value + */ + public Object deserialize(String serialized, Class<?> targetType, SyncEditingContext syncContext) { + if (serialized == null || NULL_MARKER.equals(serialized)) { + return null; + } + + // Handle object references + if (serialized.startsWith(OBJECT_REF_PREFIX)) { + String objectId = serialized.substring(OBJECT_REF_PREFIX.length()); + return syncContext.getIdentityManager().getObject(objectId); + } + + try { + // Handle primitive types + if (targetType == String.class) { + return serialized; + } + + if (targetType == int.class || targetType == Integer.class) { + return Integer.parseInt(serialized); + } + + if (targetType == long.class || targetType == Long.class) { + return Long.parseLong(serialized); + } + + if (targetType == double.class || targetType == Double.class) { + return Double.parseDouble(serialized); + } + + if (targetType == float.class || targetType == Float.class) { + return Float.parseFloat(serialized); + } + + if (targetType == boolean.class || targetType == Boolean.class) { + return Boolean.parseBoolean(serialized); + } + + if (targetType == byte.class || targetType == Byte.class) { + return Byte.parseByte(serialized); + } + + if (targetType == short.class || targetType == Short.class) { + return Short.parseShort(serialized); + } + + if (targetType == char.class || targetType == Character.class) { + return serialized.isEmpty() ? '\0' : serialized.charAt(0); + } + + // Handle enums + if (targetType.isEnum()) { + @SuppressWarnings({"unchecked", "rawtypes"}) + Object enumValue = Enum.valueOf((Class<Enum>) targetType, serialized); + return enumValue; + } + + // For other types, return the string and let PAMELA's converters handle it + return serialized; + + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to deserialize value: " + serialized + " to type " + targetType, e); + return serialized; + } + } + + /** + * Check if a serialized value is an object reference + * + * @param serialized the serialized string + * @return true if it's an object reference + */ + public boolean isObjectReference(String serialized) { + return serialized != null && serialized.startsWith(OBJECT_REF_PREFIX); + } + + /** + * Extract the object ID from a reference string + * + * @param serialized the serialized reference + * @return the object ID, or null if not a reference + */ + public String extractObjectId(String serialized) { + if (isObjectReference(serialized)) { + return serialized.substring(OBJECT_REF_PREFIX.length()); + } + return null; + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java new file mode 100644 index 00000000..18f5bfac --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java @@ -0,0 +1,178 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.io.Serializable; +import java.util.HashMap; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +/** + * Vector Clock implementation for tracking causality in distributed PAMELA instances. + * Used to establish happened-before relationships between operations from different replicas. + * + * @author PAMELA Team + */ +public class VectorClock implements Serializable, Comparable<VectorClock> { + + private static final long serialVersionUID = 1L; + + private final Map<String, Long> clock; + + public VectorClock() { + this.clock = new ConcurrentHashMap<>(); + } + + public VectorClock(Map<String, Long> initialClock) { + this.clock = new ConcurrentHashMap<>(initialClock); + } + + /** + * Copy constructor + */ + public VectorClock(VectorClock other) { + this.clock = new ConcurrentHashMap<>(other.clock); + } + + /** + * Increment the clock for a specific replica + * + * @param replicaId the replica identifier + * @return the new clock value for this replica + */ + public synchronized long increment(String replicaId) { + long newValue = clock.getOrDefault(replicaId, 0L) + 1; + clock.put(replicaId, newValue); + return newValue; + } + + /** + * Get the clock value for a specific replica + * + * @param replicaId the replica identifier + * @return the clock value, or 0 if not set + */ + public long get(String replicaId) { + return clock.getOrDefault(replicaId, 0L); + } + + /** + * Set the clock value for a specific replica + * + * @param replicaId the replica identifier + * @param value the clock value + */ + public synchronized void set(String replicaId, long value) { + clock.put(replicaId, value); + } + + /** + * Merge this vector clock with another one, taking the maximum of each component + * + * @param other the other vector clock to merge with + */ + public synchronized void merge(VectorClock other) { + for (Map.Entry<String, Long> entry : other.clock.entrySet()) { + clock.merge(entry.getKey(), entry.getValue(), Math::max); + } + } + + /** + * Check if this vector clock happened before another one + * + * @param other the other vector clock + * @return true if this clock happened before the other + */ + public boolean happenedBefore(VectorClock other) { + boolean atLeastOneLess = false; + + for (String replicaId : clock.keySet()) { + long thisValue = this.get(replicaId); + long otherValue = other.get(replicaId); + + if (thisValue > otherValue) { + return false; + } + if (thisValue < otherValue) { + atLeastOneLess = true; + } + } + + // Check for replicas in other but not in this + for (String replicaId : other.clock.keySet()) { + if (!clock.containsKey(replicaId) && other.get(replicaId) > 0) { + atLeastOneLess = true; + } + } + + return atLeastOneLess; + } + + /** + * Check if this vector clock is concurrent with another one + * (neither happened before the other) + * + * @param other the other vector clock + * @return true if the clocks are concurrent + */ + public boolean isConcurrent(VectorClock other) { + return !this.happenedBefore(other) && !other.happenedBefore(this) && !this.equals(other); + } + + /** + * Create a copy of this vector clock + * + * @return a new VectorClock with the same values + */ + public VectorClock copy() { + return new VectorClock(this); + } + + /** + * Get all clock entries + * + * @return a copy of the internal clock map + */ + public Map<String, Long> getClockMap() { + return new HashMap<>(clock); + } + + @Override + public int compareTo(VectorClock other) { + if (this.happenedBefore(other)) { + return -1; + } else if (other.happenedBefore(this)) { + return 1; + } + return 0; // Concurrent or equal + } + + @Override + public boolean equals(Object obj) { + if (this == obj) return true; + if (obj == null || getClass() != obj.getClass()) return false; + VectorClock other = (VectorClock) obj; + return clock.equals(other.clock); + } + + @Override + public int hashCode() { + return clock.hashCode(); + } + + @Override + public String toString() { + return "VectorClock" + clock; + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java new file mode 100644 index 00000000..ae16ff2b --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java @@ -0,0 +1,47 @@ +/** + * PAMELA Synchronization Package + * + * This package provides real-time collaborative editing capabilities for PAMELA models + * through RabbitMQ message broker integration. + * + * <h2>Key Components:</h2> + * <ul> + * <li>{@link org.openflexo.pamela.sync.SyncEditingContext} - Main entry point for synchronized editing</li> + * <li>{@link org.openflexo.pamela.sync.RabbitMQSyncManager} - Handles RabbitMQ communication</li> + * <li>{@link org.openflexo.pamela.sync.SyncOperation} - Represents a synchronizable operation</li> + * <li>{@link org.openflexo.pamela.sync.VectorClock} - Tracks causality between operations</li> + * <li>{@link org.openflexo.pamela.sync.ObjectIdentityManager} - Manages object UUIDs across replicas</li> + * </ul> + * + * <h2>Usage Example:</h2> + * <pre>{@code + * // Create a synchronized editing context + * SyncEditingContext syncContext = new SyncEditingContext(); + * + * // Configure RabbitMQ connection (optional, uses localhost by default) + * // RabbitMQSyncManager customManager = new RabbitMQSyncManager.Builder() + * // .host("rabbitmq.example.com") + * // .credentials("user", "password") + * // .build(); + * // SyncEditingContext syncContext = new SyncEditingContext(customManager); + * + * // Create a model factory with the sync context + * PamelaModelFactory factory = new PamelaModelFactory(MyModel.class); + * factory.setEditingContext(syncContext); + * syncContext.setModelFactory(factory); + * + * // Connect to RabbitMQ + * syncContext.connect(); + * + * // Now all operations on PAMELA objects will be synchronized + * MyModel model = factory.newInstance(MyModel.class); + * model.setName("Hello"); // This is broadcast to all other replicas + * + * // Disconnect when done + * syncContext.disconnect(); + * }</pre> + * + * @author PAMELA Team + * @since 2024 + */ +package org.openflexo.pamela.sync; diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java new file mode 100644 index 00000000..8055caaf --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java @@ -0,0 +1,112 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import java.util.List; + +import org.openflexo.pamela.AccessibleProxyObject; +import org.openflexo.pamela.annotations.Adder; +import org.openflexo.pamela.annotations.Getter; +import org.openflexo.pamela.annotations.Getter.Cardinality; +import org.openflexo.pamela.annotations.ModelEntity; +import org.openflexo.pamela.annotations.Remover; +import org.openflexo.pamela.annotations.Setter; +import org.openflexo.pamela.annotations.XMLAttribute; +import org.openflexo.pamela.annotations.XMLElement; + +/** + * A simple PAMELA model entity representing a collaborative document. + * This entity is designed to be synchronized across multiple replicas + * using the RabbitMQ-based sync infrastructure. + * + * @author PAMELA Sync Test + */ +@ModelEntity +@XMLElement(xmlTag = "CollaborativeDocument") +public interface CollaborativeDocument extends AccessibleProxyObject { + + // Property keys + String TITLE = "title"; + String CONTENT = "content"; + String AUTHOR = "author"; + String VERSION = "version"; + String TAGS = "tags"; + String SECTIONS = "sections"; + + // ========== TITLE ========== + + @Getter(value = TITLE, defaultValue = "Untitled") + @XMLAttribute + String getTitle(); + + @Setter(TITLE) + void setTitle(String title); + + // ========== CONTENT ========== + + @Getter(value = CONTENT, defaultValue = "") + @XMLAttribute + String getContent(); + + @Setter(CONTENT) + void setContent(String content); + + // ========== AUTHOR ========== + + @Getter(value = AUTHOR, defaultValue = "Anonymous") + @XMLAttribute + String getAuthor(); + + @Setter(AUTHOR) + void setAuthor(String author); + + // ========== VERSION ========== + + @Getter(value = VERSION, defaultValue = "1") + @XMLAttribute + int getVersion(); + + @Setter(VERSION) + void setVersion(int version); + + // ========== TAGS (multi-valued) ========== + + @Getter(value = TAGS, cardinality = Cardinality.LIST) + List<String> getTags(); + + @Setter(TAGS) + void setTags(List<String> tags); + + @Adder(TAGS) + void addToTags(String tag); + + @Remover(TAGS) + void removeFromTags(String tag); + + // ========== SECTIONS (embedded entities) ========== + + @Getter(value = SECTIONS, cardinality = Cardinality.LIST) + @XMLElement + List<DocumentSection> getSections(); + + @Setter(SECTIONS) + void setSections(List<DocumentSection> sections); + + @Adder(SECTIONS) + void addToSections(DocumentSection section); + + @Remover(SECTIONS) + void removeFromSections(DocumentSection section); + +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java new file mode 100644 index 00000000..682f9e76 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java @@ -0,0 +1,363 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import static org.junit.Assert.*; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.TimeUnit; + +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.ObjectIdentityManager; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; + +/** + * Test demonstrating collaborative synchronization of PAMELA objects + * across multiple replicas using RabbitMQ. + * + * This test simulates two computers (Replica A and Replica B) working on + * the same document. When Replica A modifies a property, Replica B should + * receive the change and update its local instance. + * + * PREREQUISITES: + * - RabbitMQ server must be running on localhost:5672 + * - Default guest/guest credentials (or configure as needed) + * + * To run RabbitMQ locally with Docker: + * docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * + * @author PAMELA Sync Test + */ +public class CollaborativeDocumentSyncTest { + + // CloudAMQP configuration + private static final String RABBITMQ_HOST = "rat.rmq2.cloudamqp.com"; + private static final int RABBITMQ_PORT = 5671; + private static final String RABBITMQ_USERNAME = "gcyabtej"; + private static final String RABBITMQ_PASSWORD = "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU"; + private static final String RABBITMQ_VHOST = "gcyabtej"; + private static final boolean USE_SSL = true; + private static final String EXCHANGE_NAME = "pamela-sync-test"; + + // Replica A (simulates Computer 1) + private PamelaModelFactory factoryA; + private SyncEditingContext contextA; + private RabbitMQSyncManager syncManagerA; + + // Replica B (simulates Computer 2) + private PamelaModelFactory factoryB; + private SyncEditingContext contextB; + private RabbitMQSyncManager syncManagerB; + + // Test synchronization helpers + private List<SyncOperation> receivedOperationsA = new ArrayList<>(); + private List<SyncOperation> receivedOperationsB = new ArrayList<>(); + private CountDownLatch operationLatchB; + + @Before + public void setUp() throws Exception { + // Initialize Replica A + factoryA = new PamelaModelFactory(CollaborativeDocument.class); + contextA = new SyncEditingContext(factoryA); + factoryA.setEditingContext(contextA); + + syncManagerA = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .exchangeName(EXCHANGE_NAME) + .build(); + + // Initialize Replica B + factoryB = new PamelaModelFactory(CollaborativeDocument.class); + contextB = new SyncEditingContext(factoryB); + factoryB.setEditingContext(contextB); + + syncManagerB = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .exchangeName(EXCHANGE_NAME) + .build(); + } + + @After + public void tearDown() { + if (syncManagerA != null) { + syncManagerA.disconnect(); + } + if (syncManagerB != null) { + syncManagerB.disconnect(); + } + } + + /** + * Test that creating an object on Replica A and modifying it + * propagates the changes to Replica B. + * + * Scenario: + * 1. Replica A creates a CollaborativeDocument + * 2. Replica A sets the title to "Hello from Computer A" + * 3. Replica B receives the SET operation + * 4. Replica B applies the change to its local instance + */ + @Test + public void testSetterPropagation() throws Exception { + // Skip if RabbitMQ is not available + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available on " + RABBITMQ_HOST + ":" + RABBITMQ_PORT); + return; + } + + // Expecting CREATE + SET operations + operationLatchB = new CountDownLatch(2); + + // Connect both replicas + syncManagerA.connect(); + syncManagerB.connect(); + + // Set up listeners + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + syncManagerA.addListener(new TestOperationListener(receivedOperationsA, null)); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + // Give time for queues to be set up + Thread.sleep(500); + + // ========== REPLICA A: Create document ========== + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + + // Get the object ID assigned to docA + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + assertNotNull("Document should have an ID", docId); + System.out.println("[Replica A] Created document with ID: " + docId); + + // ========== REPLICA B: Create corresponding local instance ========== + // In a real scenario, this would be done when receiving the CREATE operation + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Replica B] Registered local document with same ID: " + docId); + + // ========== REPLICA A: Modify the document ========== + System.out.println("[Replica A] Setting title to 'Hello from Computer A'"); + docA.setTitle("Hello from Computer A"); + + // Wait for Replica B to receive both CREATE and SET operations + boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + assertTrue("Replica B should have received the operations", received); + + // Verify the operation was received + assertFalse("Replica B should have received operations", receivedOperationsB.isEmpty()); + + // Find the SET operation (last one should be SET) + SyncOperation receivedOp = receivedOperationsB.get(receivedOperationsB.size() - 1); + System.out.println("[Replica B] Received operation: " + receivedOp.getOperationType() + + " on property '" + receivedOp.getPropertyIdentifier() + "'"); + + assertEquals("Operation type should be SET", SyncOperation.OperationType.SET, receivedOp.getOperationType()); + assertEquals("Property should be 'title'", "title", receivedOp.getPropertyIdentifier()); + assertEquals("New value should match", "Hello from Computer A", receivedOp.getNewValueSerialized()); + + // Verify Replica B's document was updated + assertEquals("Replica B's document title should be updated", + "Hello from Computer A", docB.getTitle()); + + System.out.println("[Replica B] Local document title updated to: " + docB.getTitle()); + System.out.println("✓ Test passed: Setter propagation works!"); + } + + /** + * Test that adding items to a list on Replica A propagates to Replica B. + */ + @Test + public void testAdderPropagation() throws Exception { + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available"); + return; + } + + // Expecting CREATE + 2 ADD operations + operationLatchB = new CountDownLatch(3); + + // Connect replicas + syncManagerA.connect(); + syncManagerB.connect(); + + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + Thread.sleep(500); + + // Create documents + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + + // Add tags on Replica A + System.out.println("[Replica A] Adding tags 'java' and 'pamela'"); + docA.addToTags("java"); + docA.addToTags("pamela"); + + // Wait for operations + boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + assertTrue("Replica B should have received ADD operations", received); + + // Verify tags were added on Replica B + assertTrue("Replica B should have 'java' tag", docB.getTags().contains("java")); + assertTrue("Replica B should have 'pamela' tag", docB.getTags().contains("pamela")); + + System.out.println("[Replica B] Tags: " + docB.getTags()); + System.out.println("✓ Test passed: Adder propagation works!"); + } + + /** + * Test bidirectional synchronization - both replicas can make changes. + */ + @Test + public void testBidirectionalSync() throws Exception { + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available"); + return; + } + + // Expecting CREATE + SET for each direction + CountDownLatch latchA = new CountDownLatch(2); + operationLatchB = new CountDownLatch(2); + + // Connect replicas + syncManagerA.connect(); + syncManagerB.connect(); + + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + syncManagerA.addListener(new TestOperationListener(receivedOperationsA, latchA)); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + Thread.sleep(500); + + // Create and register documents + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + + // Replica A modifies content + System.out.println("[Replica A] Setting content"); + docA.setContent("Content from A"); + + operationLatchB.await(5, TimeUnit.SECONDS); + assertEquals("Content from A", docB.getContent()); + + // Reset latch for next operation (expecting CREATE + SET from Replica B) + operationLatchB = new CountDownLatch(2); + latchA = new CountDownLatch(2); + syncManagerA.addListener(new TestOperationListener(null, latchA)); + syncManagerB.addListener(new TestOperationListener(null, operationLatchB)); + + // Replica B modifies author + System.out.println("[Replica B] Setting author"); + docB.setAuthor("User B"); + + latchA.await(5, TimeUnit.SECONDS); + assertEquals("User B", docA.getAuthor()); + + System.out.println("[Result] docA: content='" + docA.getContent() + "', author='" + docA.getAuthor() + "'"); + System.out.println("[Result] docB: content='" + docB.getContent() + "', author='" + docB.getAuthor() + "'"); + System.out.println("✓ Test passed: Bidirectional sync works!"); + } + + /** + * Check if RabbitMQ is available for testing. + */ + private boolean isRabbitMQAvailable() { + try { + RabbitMQSyncManager testManager = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .build(); + testManager.connect(); + testManager.disconnect(); + return true; + } catch (Exception e) { + return false; + } + } + + /** + * Helper listener to capture operations for test verification. + */ + private static class TestOperationListener implements SyncOperationListener { + private final List<SyncOperation> operations; + private final CountDownLatch latch; + + public TestOperationListener(List<SyncOperation> operations, CountDownLatch latch) { + this.operations = operations; + this.latch = latch; + } + + @Override + public void onOperationReceived(SyncOperation operation) { + if (operations != null) { + operations.add(operation); + } + if (latch != null) { + latch.countDown(); + } + } + + @Override + public void onConnected() { + System.out.println(" [Listener] Connected to RabbitMQ"); + } + + @Override + public void onDisconnected(String reason) { + System.out.println(" [Listener] Disconnected from RabbitMQ: " + reason); + } + + @Override + public void onError(Throwable e) { + System.err.println(" [Listener] Error: " + e.getMessage()); + } + } +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java new file mode 100644 index 00000000..8aa12bb9 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java @@ -0,0 +1,58 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import org.openflexo.pamela.AccessibleProxyObject; +import org.openflexo.pamela.annotations.Getter; +import org.openflexo.pamela.annotations.ModelEntity; +import org.openflexo.pamela.annotations.Setter; +import org.openflexo.pamela.annotations.XMLAttribute; +import org.openflexo.pamela.annotations.XMLElement; + +/** + * A section within a collaborative document. + * Demonstrates nested entity synchronization. + * + * @author PAMELA Sync Test + */ +@ModelEntity +@XMLElement(xmlTag = "DocumentSection") +public interface DocumentSection extends AccessibleProxyObject { + + String HEADING = "heading"; + String BODY = "body"; + String ORDER = "order"; + + @Getter(value = HEADING, defaultValue = "New Section") + @XMLAttribute + String getHeading(); + + @Setter(HEADING) + void setHeading(String heading); + + @Getter(value = BODY, defaultValue = "") + @XMLAttribute + String getBody(); + + @Setter(BODY) + void setBody(String body); + + @Getter(value = ORDER, defaultValue = "0") + @XMLAttribute + int getOrder(); + + @Setter(ORDER) + void setOrder(int order); + +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java new file mode 100644 index 00000000..5a26d761 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java @@ -0,0 +1,354 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import static org.junit.Assert.*; + +import java.util.ArrayList; +import java.util.List; + +import org.junit.Before; +import org.junit.Test; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.ObjectIdentityManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.pamela.sync.SyncOperationSerializer; +import org.openflexo.pamela.sync.VectorClock; + +/** + * Unit tests for the synchronization infrastructure without requiring RabbitMQ. + * These tests validate the core sync components in isolation. + * + * @author PAMELA Sync Test + */ +public class SyncInfrastructureTest { + + private PamelaModelFactory factory; + private SyncEditingContext context; + private List<SyncOperation> capturedOperations; + + @Before + public void setUp() throws Exception { + factory = new PamelaModelFactory(CollaborativeDocument.class); + context = new SyncEditingContext(factory); + factory.setEditingContext(context); + capturedOperations = new ArrayList<>(); + + // Use a mock sync manager that captures operations locally + context.setSyncManager(new LocalCaptureSyncManager(capturedOperations)); + } + + // ========== Vector Clock Tests ========== + + @Test + public void testVectorClockIncrement() { + VectorClock clock = new VectorClock(); + + assertEquals(0, clock.get("replica1")); + + clock.increment("replica1"); + assertEquals(1, clock.get("replica1")); + + clock.increment("replica1"); + assertEquals(2, clock.get("replica1")); + } + + @Test + public void testVectorClockMerge() { + VectorClock clockA = new VectorClock(); + VectorClock clockB = new VectorClock(); + + clockA.increment("A"); // A: {A=1} + clockA.increment("A"); // A: {A=2} + + clockB.increment("B"); // B: {B=1} + + clockA.merge(clockB); // A: {A=2, B=1} + + assertEquals(2, clockA.get("A")); + assertEquals(1, clockA.get("B")); + } + + @Test + public void testVectorClockHappenedBefore() { + VectorClock clock1 = new VectorClock(); + VectorClock clock2 = new VectorClock(); + + clock1.increment("A"); // {A=1} + clock2.increment("A"); // {A=1} + clock2.increment("A"); // {A=2} + + assertTrue("clock1 should happen before clock2", clock1.happenedBefore(clock2)); + assertFalse("clock2 should NOT happen before clock1", clock2.happenedBefore(clock1)); + } + + @Test + public void testVectorClockConcurrent() { + VectorClock clockA = new VectorClock(); + VectorClock clockB = new VectorClock(); + + clockA.increment("A"); // A: {A=1} + clockB.increment("B"); // B: {B=1} + + assertTrue("Concurrent operations should be detected", clockA.isConcurrent(clockB)); + assertTrue("Concurrent is symmetric", clockB.isConcurrent(clockA)); + } + + // ========== Object Identity Manager Tests ========== + + @Test + public void testObjectIdentityRegistration() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + String id1 = manager.getOrCreateObjectId(doc); + assertNotNull("Should generate ID", id1); + + String id2 = manager.getOrCreateObjectId(doc); + assertEquals("Same object should return same ID", id1, id2); + } + + @Test + public void testObjectIdentityLookup() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + String id = manager.getOrCreateObjectId(doc); + + Object retrieved = manager.getObject(id); + assertSame("Should retrieve the same object", doc, retrieved); + } + + @Test + public void testObjectIdentityExplicitRegistration() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + String customId = "my-custom-id-12345"; + + manager.registerObject(doc, customId); + + assertEquals("Should use custom ID", customId, manager.getOrCreateObjectId(doc)); + assertSame("Should retrieve by custom ID", doc, manager.getObject(customId)); + } + + // ========== SyncOperation Serialization Tests ========== + + @Test + public void testSyncOperationSerialization() throws Exception { + VectorClock clock = new VectorClock(); + clock.increment("replica1"); + + SyncOperation original = new SyncOperation.Builder(SyncOperation.OperationType.SET) + .objectId("obj-123") + .entityType("CollaborativeDocument") + .propertyIdentifier("title") + .oldValue("Old Title") + .newValue("New Title") + .vectorClock(clock) + .replicaId("replica1") + .build(); + + SyncOperationSerializer serializer = new SyncOperationSerializer(); + + // Serialize to JSON + String json = serializer.serialize(original); + assertNotNull("Should serialize to JSON", json); + assertTrue("JSON should contain operation type", json.contains("SET")); + assertTrue("JSON should contain property", json.contains("title")); + + // Deserialize back + SyncOperation deserialized = serializer.deserialize(json); + assertNotNull("Should deserialize", deserialized); + assertEquals("Operation type should match", original.getOperationType(), deserialized.getOperationType()); + assertEquals("Object ID should match", original.getObjectId(), deserialized.getObjectId()); + assertEquals("Property should match", original.getPropertyIdentifier(), deserialized.getPropertyIdentifier()); + assertEquals("New value should match", original.getNewValueSerialized(), deserialized.getNewValueSerialized()); + assertEquals("Replica ID should match", original.getReplicaId(), deserialized.getReplicaId()); + } + + @Test + public void testSyncOperationBytesSerialization() throws Exception { + SyncOperation original = new SyncOperation.Builder(SyncOperation.OperationType.ADD) + .objectId("obj-456") + .entityType("CollaborativeDocument") + .propertyIdentifier("tags") + .newValue("new-tag") + .replicaId("replica2") + .build(); + + SyncOperationSerializer serializer = new SyncOperationSerializer(); + + byte[] bytes = serializer.serializeToBytes(original); + assertNotNull("Should serialize to bytes", bytes); + assertTrue("Bytes should not be empty", bytes.length > 0); + + SyncOperation deserialized = serializer.deserializeFromBytes(bytes); + assertNotNull("Should deserialize from bytes", deserialized); + assertEquals(SyncOperation.OperationType.ADD, deserialized.getOperationType()); + assertEquals("tags", deserialized.getPropertyIdentifier()); + } + + // ========== SyncEditingContext Operation Capture Tests ========== + + @Test + public void testSetOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + // Modify the document + doc.setTitle("Test Title"); + + // Check that a SET operation was captured + assertFalse("Should capture SET operation", capturedOperations.isEmpty()); + + SyncOperation op = findOperationByProperty("title"); + assertNotNull("Should have title operation", op); + assertEquals(SyncOperation.OperationType.SET, op.getOperationType()); + assertEquals("Test Title", op.getNewValueSerialized()); + } + + @Test + public void testAddOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + // Add a tag + doc.addToTags("java"); + + // Check that an ADD operation was captured + SyncOperation op = findOperationByProperty("tags"); + assertNotNull("Should have tags operation", op); + assertEquals(SyncOperation.OperationType.ADD, op.getOperationType()); + assertEquals("java", op.getNewValueSerialized()); + } + + @Test + public void testRemoveOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + doc.addToTags("java"); + + capturedOperations.clear(); // Clear the ADD operation + + // Remove the tag + doc.removeFromTags("java"); + + // Check that a REMOVE operation was captured + SyncOperation op = findOperationByProperty("tags"); + assertNotNull("Should have tags operation", op); + assertEquals(SyncOperation.OperationType.REMOVE, op.getOperationType()); + } + + @Test + public void testMultipleOperationsCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + doc.setTitle("My Document"); + doc.setAuthor("John Doe"); + doc.setContent("Some content here"); + doc.addToTags("tag1"); + doc.addToTags("tag2"); + + // Should have captured multiple operations + assertTrue("Should have multiple operations", capturedOperations.size() >= 5); + + // Verify we have the expected operations + assertNotNull("Should have title op", findOperationByProperty("title")); + assertNotNull("Should have author op", findOperationByProperty("author")); + assertNotNull("Should have content op", findOperationByProperty("content")); + } + + // ========== Nested Entity Tests ========== + + @Test + public void testNestedEntityOperations() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + DocumentSection section = factory.newInstance(DocumentSection.class); + + section.setHeading("Introduction"); + section.setBody("This is the introduction section."); + + capturedOperations.clear(); + + doc.addToSections(section); + + // Should capture the ADD operation for sections + SyncOperation op = findOperationByProperty("sections"); + assertNotNull("Should have sections ADD operation", op); + assertEquals(SyncOperation.OperationType.ADD, op.getOperationType()); + } + + // ========== Helper Methods ========== + + private SyncOperation findOperationByProperty(String propertyName) { + for (SyncOperation op : capturedOperations) { + if (propertyName.equals(op.getPropertyIdentifier())) { + return op; + } + } + return null; + } + + /** + * A local mock sync manager that captures operations without network communication. + */ + private static class LocalCaptureSyncManager implements org.openflexo.pamela.sync.SyncManager { + private final List<SyncOperation> capturedOperations; + private final List<SyncOperationListener> listeners = new ArrayList<>(); + + public LocalCaptureSyncManager(List<SyncOperation> capturedOperations) { + this.capturedOperations = capturedOperations; + } + + @Override + public void publishOperation(SyncOperation operation) { + capturedOperations.add(operation); + // Notify listeners (simulating message reception) + for (SyncOperationListener listener : listeners) { + listener.onOperationReceived(operation); + } + } + + @Override + public void addListener(SyncOperationListener listener) { + listeners.add(listener); + } + + @Override + public void removeListener(SyncOperationListener listener) { + listeners.remove(listener); + } + + @Override + public boolean isConnected() { + return true; + } + + @Override + public String getReplicaId() { + return "test-replica"; + } + } +} diff --git a/settings.gradle b/settings.gradle index 0e0b8df5..ace68624 100644 --- a/settings.gradle +++ b/settings.gradle @@ -1,4 +1,5 @@ include 'pamela-core' include 'pamela-security-patterns' +include 'book' //include 'pamela-perf-tests' //include 'pamela-spring-security-uc' From dec27b56f910efd98b4c64816a9105d997334fe1 Mon Sep 17 00:00:00 2001 From: m23loure <margot.lourencodasilva@gmail.com> Date: Tue, 13 Jan 2026 13:51:17 +0100 Subject: [PATCH 2/8] refacto de la partie reception des actions d'un autre replica --- .../pamela/sync/SyncEditingContext.java | 117 ++++-------------- 1 file changed, 26 insertions(+), 91 deletions(-) diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java index 7f6f3fbd..3d7044aa 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -346,22 +346,16 @@ public void onOperationReceived(SyncOperation operation) { applyingRemoteOperation.set(true); try { - switch (operation.getOperationType()) { - case SET: - applyRemoteSet(operation); - break; - case ADD: - applyRemoteAdd(operation); - break; - case REMOVE: - applyRemoteRemove(operation); - break; + switch (operation.getOperationType()) { case CREATE: applyRemoteCreate(operation); break; case DELETE: applyRemoteDelete(operation); break; + case SET: case ADD: case REMOVE: + applyRemoteModification(operation); + break; default: logger.warning("Unknown operation type: " + operation.getOperationType()); } @@ -859,97 +853,43 @@ private String unescapeJson(String value) { // Private methods for applying remote operations - private void applyRemoteSet(SyncOperation operation) { + private void applyRemoteModification(SyncOperation operation){ Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - // Object doesn't exist yet - try to create it first - // This can happen if SET arrives before CREATE due to message ordering - target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - if (target == null) { - logger.warning("Target object not found for SET: " + operation.getObjectId()); - return; - } - } - - try { - ProxyMethodHandler<?> handler = modelFactory.getHandler(target); - if (handler != null) { - ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); - if (property != null) { - Object newValue = valueSerializer.deserialize( - operation.getNewValueSerialized(), - property.getType(), - this - ); - handler.invokeSetter(operation.getPropertyIdentifier(), newValue); - } - } - } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote SET", e); - } - } - - private void applyRemoteAdd(SyncOperation operation) { - logger.info("Applying remote ADD: objectId=" + operation.getObjectId() - + " property=" + operation.getPropertyIdentifier() - + " value=" + operation.getNewValueSerialized()); + if (target == null) + // Object doesn't exist yet - try to create it first (might happen because of reordering operations) + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - // Object doesn't exist yet - try to create it first - target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - if (target == null) { - logger.warning("Target object not found for ADD: " + operation.getObjectId()); - return; - } - } - try { ProxyMethodHandler<?> handler = modelFactory.getHandler(target); if (handler != null) { ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); if (property != null) { - Object value = valueSerializer.deserialize( + Object newValue = valueSerializer.deserialize( operation.getNewValueSerialized(), property.getType(), this ); - logger.info("Deserialized value for ADD: " + value + " (type=" + (value != null ? value.getClass().getName() : "null") + ")"); - // Use property identifier string - handler.invokeAdder(operation.getPropertyIdentifier(), value); - logger.info("Successfully added to collection"); + switch(operation.getOperationType()){ + case SET: + handler.invokeSetter(operation.getPropertyIdentifier(), newValue); + break; + case ADD: + handler.invokeAdder(operation.getPropertyIdentifier(), newValue); + break; + case REMOVE: + handler.invokeRemover(operation.getPropertyIdentifier(), newValue); + break; + default: + break; + } } } } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote ADD", e); - } - } - - private void applyRemoteRemove(SyncOperation operation) { - Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - logger.warning("Target object not found for REMOVE: " + operation.getObjectId()); - return; - } - - try { - ProxyMethodHandler<?> handler = modelFactory.getHandler(target); - if (handler != null) { - ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); - if (property != null) { - Object value = valueSerializer.deserialize( - operation.getOldValueSerialized(), - property.getType(), - this - ); - handler.invokeRemover(operation.getPropertyIdentifier(), value); - } - } - } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote REMOVE", e); + logger.log(Level.SEVERE, "Failed to apply" + operation.getOperationType(), e); } } + private void applyRemoteCreate(SyncOperation operation) { // Check if object already exists if (identityManager.hasObject(operation.getObjectId())) { @@ -1003,6 +943,7 @@ private void applyRemoteDelete(SyncOperation operation) { } catch (Exception e) { logger.log(Level.SEVERE, "Failed to apply remote DELETE", e); } + } /** @@ -1013,13 +954,7 @@ private void applyRemoteDelete(SyncOperation operation) { * @param entityType the entity class name * @return the object, or null if creation failed */ - private Object ensureRemoteObjectExists(String objectId, String entityType) { - // Check again if it exists now - Object existing = identityManager.getObject(objectId); - if (existing != null) { - return existing; - } - + private Object ensureRemoteObjectExists(String objectId, String entityType) { if (entityType == null) { logger.warning("Cannot create object without entityType for ID: " + objectId); return null; From 8568078ffd0c1e2904be6387b992678f00289e0e Mon Sep 17 00:00:00 2001 From: NGUENGOUE WATCHO Serena Ginger <serena.nguengoue-watcho@imt-atlantique.net> Date: Wed, 14 Jan 2026 09:17:15 +0100 Subject: [PATCH 3/8] ma version avec le undo --- .../factory/DelegateImplementation.java | 19 ++++++++-- .../pamela/factory/PamelaModelFactory.java | 16 +++++++-- .../pamela/factory/ProxyMethodHandler.java | 35 +++++++++++++------ .../pamela/sync/SyncEditingContext.java | 17 +++++++++ .../org/openflexo/pamela/undo/AddCommand.java | 8 ++--- .../org/openflexo/pamela/undo/AtomicEdit.java | 9 ++++- .../openflexo/pamela/undo/CreateCommand.java | 4 +-- .../openflexo/pamela/undo/DeleteCommand.java | 4 +-- .../openflexo/pamela/undo/RemoveCommand.java | 4 +-- .../org/openflexo/pamela/undo/SetCommand.java | 4 +-- .../openflexo/pamela/undo/UndoManager.java | 21 +++++++++++ 11 files changed, 112 insertions(+), 29 deletions(-) diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/DelegateImplementation.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/DelegateImplementation.java index f9a05207..6044cb9b 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/DelegateImplementation.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/DelegateImplementation.java @@ -149,20 +149,20 @@ public Object invoke(Object self, Method method, Method proceed, Object[] args) if (getUndoManager() != null) { if (oldValue != args[0]) { getUndoManager() - .addEdit(new SetCommand<>(masterObject, getModelEntity(), property, oldValue, args[0], getModelFactory())); + .addEdit(new SetCommand<>(masterObject, getModelEntity(), property, oldValue, args[0], getModelFactory(), getCurrentReplicaId())); } } } if (PamelaUtils.methodIsEquivalentTo(method, property.getAdderMethod())) { // System.out.println("DETECTS ADD with " + proceed + " instead of " + method); if (getUndoManager() != null) { - getUndoManager().addEdit(new AddCommand<>(masterObject, getModelEntity(), property, args[0], getModelFactory())); + getUndoManager().addEdit(new AddCommand<>(masterObject, getModelEntity(), property, args[0], getModelFactory(), getCurrentReplicaId())); } } if (PamelaUtils.methodIsEquivalentTo(method, property.getRemoverMethod())) { // System.out.println("DETECTS REMOVE with " + proceed + " instead of " + method); if (getUndoManager() != null) { - getUndoManager().addEdit(new RemoveCommand<>(masterObject, getModelEntity(), property, args[0], getModelFactory())); + getUndoManager().addEdit(new RemoveCommand<>(masterObject, getModelEntity(), property, args[0], getModelFactory(), getCurrentReplicaId())); } } } @@ -249,4 +249,17 @@ public UndoManager getUndoManager() { return null; } + /** + * Get the current replica ID from the SyncEditingContext. + * Returns null if not in a sync context or if no SyncManager is configured. + */ + private String getCurrentReplicaId() { + EditingContext context = getModelFactory().getEditingContext(); + if (context instanceof org.openflexo.pamela.sync.SyncEditingContext) { + org.openflexo.pamela.sync.SyncEditingContext syncContext = (org.openflexo.pamela.sync.SyncEditingContext) context; + return syncContext.getReplicaId(); + } + return null; + } + } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java index e62e35e9..ebfd3425 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java @@ -450,7 +450,7 @@ public <I> I newInstance(Class<I> implementedInterface, Object... args) { I returned = proxyFactory.newInstance(args); if (getEditingContext() != null) { if (getEditingContext().getUndoManager() != null) { - getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); + getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this, getCurrentReplicaId())); } // Broadcast CREATE operation for collaborative sync if (getEditingContext() instanceof SyncEditingContext) { @@ -500,7 +500,7 @@ public <I> I _newInstance(Class<I> implementedInterface, boolean useExtended, Ob I returned = proxyFactory.newInstance(args); if (getEditingContext() != null) { if (getEditingContext().getUndoManager() != null) { - getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); + getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this, getCurrentReplicaId())); } // Broadcast CREATE operation for collaborative sync if (getEditingContext() instanceof SyncEditingContext) { @@ -1036,6 +1036,18 @@ public EditingContext getEditingContext() { return editingContext; } + /** + * Get the current replica ID from the SyncEditingContext. + * Returns null if not in a sync context or if no SyncManager is configured. + */ + private String getCurrentReplicaId() { + if (editingContext instanceof SyncEditingContext) { + SyncEditingContext syncContext = (SyncEditingContext) editingContext; + return syncContext.getReplicaId(); + } + return null; + } + /** * Sets {@link EditingContext} associated with this factory.<br> * When not null, new instances created with this factory are automatically registered in this EditingContext diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java index 4a419928..f47b1c4d 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java @@ -231,6 +231,19 @@ public UndoManager getUndoManager() { return null; } + /** + * Get the current replica ID from the SyncEditingContext. + * Returns null if not in a sync context or if no SyncManager is configured. + */ + private String getCurrentReplicaId() { + EditingContext context = getModelFactory().getEditingContext(); + if (context instanceof org.openflexo.pamela.sync.SyncEditingContext) { + org.openflexo.pamela.sync.SyncEditingContext syncContext = (org.openflexo.pamela.sync.SyncEditingContext) context; + return syncContext.getReplicaId(); + } + return null; + } + public EditingContext getEditingContext() { return editingContext; } @@ -423,7 +436,7 @@ private Object _invoke(Object self, Method method, Method proceed, Object[] args if (getUndoManager() != null) { if (oldValue != args[0]) { getUndoManager().addEdit( - new SetCommand<>(getObject(), getModelEntity(), property, oldValue, args[0], getModelFactory())); + new SetCommand<>(getObject(), getModelEntity(), property, oldValue, args[0], getModelFactory(), getCurrentReplicaId())); } } if (property.isSerializable()) { @@ -435,7 +448,7 @@ private Object _invoke(Object self, Method method, Method proceed, Object[] args // We will invoke it, but also notify UndoManager, and call setModified() after adder invoking // System.out.println("DETECTS ADD with " + proceed + " instead of " + method); if (getUndoManager() != null) { - getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, args[0], getModelFactory())); + getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, args[0], getModelFactory(), getCurrentReplicaId())); } if (property.isSerializable()) { callSetModifiedAtTheEnd = true; @@ -446,7 +459,7 @@ private Object _invoke(Object self, Method method, Method proceed, Object[] args // We will invoke it, but also notify UndoManager, and call setModified() after remover invoking // System.out.println("DETECTS REMOVE with " + proceed + " instead of " + method); if (getUndoManager() != null) { - getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, args[0], getModelFactory())); + getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, args[0], getModelFactory(), getCurrentReplicaId())); } if (property.isSerializable()) { callSetModifiedAtTheEnd = true; @@ -1062,7 +1075,7 @@ else if (property.getCardinality() == Cardinality.LIST) { } if (trackAtomicEdit && getUndoManager() != null) { - getUndoManager().addEdit(new DeleteCommand<>(getObject(), getModelEntity(), getModelFactory())); + getUndoManager().addEdit(new DeleteCommand<>(getObject(), getModelEntity(), getModelFactory(), getCurrentReplicaId())); } // Broadcast delete operation to other replicas @@ -1107,7 +1120,7 @@ protected boolean internallyInvokeUndeleter(boolean restoreProperties, boolean t undeleting = true; if (trackAtomicEdit && getUndoManager() != null) { - getUndoManager().addEdit(new CreateCommand<>(getObject(), getModelEntity(), getModelFactory())); + getUndoManager().addEdit(new CreateCommand<>(getObject(), getModelEntity(), getModelFactory(), getCurrentReplicaId())); } if (restoreProperties) { @@ -1421,7 +1434,7 @@ private <T> void internallyInvokeSetter(ModelProperty<? super I> property, Setta Object oldValue = invokeGetter(property); if (trackAtomicEdit && getUndoManager() != null) { if (oldValue != value) { - getUndoManager().addEdit(new SetCommand<>(getObject(), getModelEntity(), property, oldValue, value, getModelFactory())); + getUndoManager().addEdit(new SetCommand<>(getObject(), getModelEntity(), property, oldValue, value, getModelFactory(), getCurrentReplicaId())); } } propertyImplementation.set(value); @@ -1437,7 +1450,7 @@ private <T> void internallyInvokeUpdater(ModelProperty<? super I> property, Sett if (trackAtomicEdit && getUndoManager() != null) { Object oldValue = invokeGetter(property); if (oldValue != value) { - getUndoManager().addEdit(new SetCommand<>(getObject(), getModelEntity(), property, oldValue, value, getModelFactory())); + getUndoManager().addEdit(new SetCommand<>(getObject(), getModelEntity(), property, oldValue, value, getModelFactory(), getCurrentReplicaId())); } } propertyImplementation.update(value); @@ -1447,7 +1460,7 @@ private <T> void internallyInvokeAdder(ModelProperty<? super I> property, Multip T value, int index, boolean trackAtomicEdit) throws ModelDefinitionException { // System.out.println("Invoke ADDER "+property.getPropertyIdentifier()); if (trackAtomicEdit && getUndoManager() != null) { - getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); + getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory(), getCurrentReplicaId())); } propertyImplementation.addTo(value, index); @@ -1461,7 +1474,7 @@ private <T> void internallyInvokeRemover(ModelProperty<? super I> property, Mult T value, boolean trackAtomicEdit) throws ModelDefinitionException { // System.out.println("Invoke ADDER "+property.getPropertyIdentifier()); if (trackAtomicEdit && getUndoManager() != null) { - getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); + getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory(), getCurrentReplicaId())); } propertyImplementation.removeFrom(value); @@ -1476,8 +1489,8 @@ private <T> void internallyInvokeReindexer(ModelProperty<? super I> property, throws ModelDefinitionException { // System.out.println("Invoke ADDER "+property.getPropertyIdentifier()); if (trackAtomicEdit && getUndoManager() != null) { - getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); - getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); + getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory(), getCurrentReplicaId())); + getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory(), getCurrentReplicaId())); } propertyImplementation.reindex(value, index); } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java index 3d7044aa..8058de12 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -445,6 +445,23 @@ public boolean isStateReceived() { return stateReceived; } + /** + * Creates and configures an UndoManager for this sync editing context. + * The UndoManager is configured with the local replica ID to filter out remote edits. + */ + @Override + public org.openflexo.pamela.undo.UndoManager createUndoManager() { + org.openflexo.pamela.undo.UndoManager undoManager = super.createUndoManager(); + + // Configure the UndoManager with the local replica ID + // This ensures it only tracks edits from the local replica + if (syncManager != null) { + undoManager.setLocalReplicaId(syncManager.getReplicaId()); + } + + return undoManager; + } + /** * Request state from other replicas. * Call this when a new client joins to get the current state. diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/AddCommand.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/AddCommand.java index abca3781..a0e8472d 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/AddCommand.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/AddCommand.java @@ -62,8 +62,8 @@ public class AddCommand<I> extends AtomicEdit<I> { private final int index; public AddCommand(I updatedObject, ModelEntity<I> modelEntity, ModelProperty<? super I> modelProperty, Object addedValue, - PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.updatedObject = updatedObject; this.modelProperty = modelProperty; this.addedValue = addedValue; @@ -71,8 +71,8 @@ public AddCommand(I updatedObject, ModelEntity<I> modelEntity, ModelProperty<? s } public AddCommand(I updatedObject, ModelEntity<I> modelEntity, ModelProperty<? super I> modelProperty, Object addedValue, int index, - PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.updatedObject = updatedObject; this.modelProperty = modelProperty; this.addedValue = addedValue; diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/AtomicEdit.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/AtomicEdit.java index eff0b53c..0dd9460c 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/AtomicEdit.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/AtomicEdit.java @@ -56,10 +56,12 @@ public abstract class AtomicEdit<I> implements UndoableEdit { private PamelaModelFactory pamelaModelFactory; private ModelEntity<I> modelEntity; + private String replicaId; - public AtomicEdit(ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory) { + public AtomicEdit(ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory, String replicaId) { this.modelEntity = modelEntity; this.pamelaModelFactory = pamelaModelFactory; + this.replicaId = replicaId; } public PamelaModelFactory getModelFactory() { @@ -70,6 +72,10 @@ public ModelEntity<I> getModelEntity() { return modelEntity; } + public String getReplicaId() { + return replicaId; + } + public abstract I getObject(); @Override @@ -88,6 +94,7 @@ public final boolean replaceEdit(UndoableEdit anEdit) { public void die() { modelEntity = null; pamelaModelFactory = null; + replicaId = null; } @Override diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/CreateCommand.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/CreateCommand.java index 6b453ad9..f24152b8 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/CreateCommand.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/CreateCommand.java @@ -57,8 +57,8 @@ public class CreateCommand<I> extends AtomicEdit<I> { private I createdObject; - public CreateCommand(I createdObject, ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + public CreateCommand(I createdObject, ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.createdObject = createdObject; } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/DeleteCommand.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/DeleteCommand.java index 249cdd3e..ea749332 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/DeleteCommand.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/DeleteCommand.java @@ -57,8 +57,8 @@ public class DeleteCommand<I> extends AtomicEdit<I> { private I deletedObject; - public DeleteCommand(I deletedObject, ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + public DeleteCommand(I deletedObject, ModelEntity<I> modelEntity, PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.deletedObject = deletedObject; } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/RemoveCommand.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/RemoveCommand.java index a68419aa..14cbda92 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/RemoveCommand.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/RemoveCommand.java @@ -61,8 +61,8 @@ public class RemoveCommand<I> extends AtomicEdit<I> { private ModelProperty<? super I> modelProperty; public RemoveCommand(I updatedObject, ModelEntity<I> modelEntity, ModelProperty<? super I> modelProperty, Object removedValue, - PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.updatedObject = updatedObject; this.modelProperty = modelProperty; this.removedValue = removedValue; diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/SetCommand.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/SetCommand.java index 3484cf22..76e23cc9 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/SetCommand.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/SetCommand.java @@ -63,8 +63,8 @@ public class SetCommand<I> extends AtomicEdit<I> { private ModelProperty<? super I> modelProperty; public SetCommand(I updatedObject, ModelEntity<I> modelEntity, ModelProperty<? super I> modelProperty, Object oldValue, - Object newValue, PamelaModelFactory pamelaModelFactory) { - super(modelEntity, pamelaModelFactory); + Object newValue, PamelaModelFactory pamelaModelFactory, String replicaId) { + super(modelEntity, pamelaModelFactory, replicaId); this.updatedObject = updatedObject; this.modelProperty = modelProperty; this.oldValue = oldValue; diff --git a/pamela-core/src/main/java/org/openflexo/pamela/undo/UndoManager.java b/pamela-core/src/main/java/org/openflexo/pamela/undo/UndoManager.java index 4146b134..1c1aa6c3 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/undo/UndoManager.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/undo/UndoManager.java @@ -101,10 +101,22 @@ public class UndoManager extends javax.swing.undo.UndoManager implements HasProp private boolean enabled = true; + private String localReplicaId = null; + public UndoManager() { pcSupport = new PropertyChangeSupport(this); } + /** + * Set the local replica ID for filtering undo/redo operations. + * Only edits from this replica will be added to the undo stack. + * + * @param replicaId the local replica ID + */ + public void setLocalReplicaId(String replicaId) { + this.localReplicaId = replicaId; + } + private static final String ANTICIPATED_RECORDING = "AnticipatedRecording"; private static boolean allowsAnticipatedRecording = false; private static CompoundEdit anticipatedRecording; @@ -336,6 +348,15 @@ public synchronized boolean addEdit(UndoableEdit anEdit) { } if (anEdit instanceof AtomicEdit) { + AtomicEdit<?> atomicEdit = (AtomicEdit<?>) anEdit; + + // Filter out edits from remote replicas + String editReplicaId = atomicEdit.getReplicaId(); + if (editReplicaId != null && localReplicaId != null && !editReplicaId.equals(localReplicaId)) { + logger.fine("Ignoring edit from remote replica: " + editReplicaId + " (local: " + localReplicaId + ")"); + anEdit.die(); + return false; + } // If UNDO is in progress, ignore it if (undoInProgress) { From 505ff38117513f89636630148808b56b924aa3af Mon Sep 17 00:00:00 2001 From: TeodoreAutuly <teodore@autuly.com> Date: Tue, 13 Jan 2026 10:22:20 +0100 Subject: [PATCH 4/8] NewSyncFeatureBootstrap --- README.md | 13 + book/.DS_Store | Bin 0 -> 6148 bytes book/SYNC_README.md | 157 +++ book/build.gradle | 79 ++ book/gradle/.DS_Store | Bin 0 -> 6148 bytes book/gradle/wrapper/gradle-wrapper.jar | Bin 0 -> 59203 bytes book/gradle/wrapper/gradle-wrapper.properties | 5 + book/gradlew | 185 +++ book/gradlew.bat | 89 ++ book/settings.gradle | 10 + .../java/org/openflexo/testPamela/App.java | 41 + .../testPamela/DistributedFeatureDemo.java | 517 ++++++++ .../org/openflexo/testPamela/ReplicaA.java | 133 +++ .../org/openflexo/testPamela/ReplicaB.java | 156 +++ .../org/openflexo/testPamela/ReplicaC.java | 148 +++ .../org/openflexo/testPamela/model/Book.java | 74 ++ .../openflexo/testPamela/model/Journal.java | 10 + .../openflexo/testPamela/model/Library.java | 64 + .../org/openflexo/testPamela/model/Novel.java | 10 + .../org/openflexo/testPamela/AppTest.java | 38 + pamela-core/build.gradle | 5 + .../pamela/factory/PamelaModelFactory.java | 21 + .../pamela/factory/ProxyMethodHandler.java | 96 ++ .../pamela/sync/ObjectIdentityManager.java | 167 +++ .../pamela/sync/RabbitMQSyncManager.java | 505 ++++++++ .../pamela/sync/SyncEditingContext.java | 1054 +++++++++++++++++ .../openflexo/pamela/sync/SyncManager.java | 80 ++ .../openflexo/pamela/sync/SyncOperation.java | 230 ++++ .../pamela/sync/SyncOperationListener.java | 71 ++ .../pamela/sync/SyncOperationSerializer.java | 176 +++ .../pamela/sync/SyncValueSerializer.java | 182 +++ .../openflexo/pamela/sync/VectorClock.java | 178 +++ .../openflexo/pamela/sync/package-info.java | 47 + .../test/sync/CollaborativeDocument.java | 112 ++ .../sync/CollaborativeDocumentSyncTest.java | 363 ++++++ .../pamela/test/sync/DocumentSection.java | 58 + .../test/sync/SyncInfrastructureTest.java | 354 ++++++ settings.gradle | 1 + 38 files changed, 5429 insertions(+) create mode 100644 book/.DS_Store create mode 100644 book/SYNC_README.md create mode 100644 book/build.gradle create mode 100644 book/gradle/.DS_Store create mode 100644 book/gradle/wrapper/gradle-wrapper.jar create mode 100644 book/gradle/wrapper/gradle-wrapper.properties create mode 100644 book/gradlew create mode 100644 book/gradlew.bat create mode 100644 book/settings.gradle create mode 100644 book/src/main/java/org/openflexo/testPamela/App.java create mode 100644 book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaA.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaB.java create mode 100644 book/src/main/java/org/openflexo/testPamela/ReplicaC.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Book.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Journal.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Library.java create mode 100644 book/src/main/java/org/openflexo/testPamela/model/Novel.java create mode 100644 book/src/test/java/org/openflexo/testPamela/AppTest.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java create mode 100644 pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java create mode 100644 pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java diff --git a/README.md b/README.md index 37df5d3c..a56ee39e 100644 --- a/README.md +++ b/README.md @@ -18,3 +18,16 @@ PAMELA approach has been tested and validated on some java-based industrial proj - Dynamic code weaving at runtime (aspect programming without compilation) Official website, documentation and installation available here : [https://www.openflexo.org/pamela](https://www.openflexo.org/pamela) + +## Lunch Sync Feature + +Build the projet with gradle: + +```bash +.\gradlew.bat clean :pamela-core:build :book:classes -x test --console=plain +``` +Then run the Book example with the following command: + +```bash +.\gradlew.bat :book:runDemo --console=plain +``` diff --git a/book/.DS_Store b/book/.DS_Store new file mode 100644 index 0000000000000000000000000000000000000000..2fa56ccf815915cdb257ab6fe36094a3eddce933 GIT binary patch literal 6148 zcmeHKu};H44E50>3M?HN7$PAtA*9YMp$Z>>I<S_IsvxDLqI6)3*!Ua%f{jlA1~vvh z0iN$1dZz@$givKy=XdehXXi;d_lU^!=UI=aOGF(E#`XqOgYY_!nyiS0gN@xIqnt+h zxHmW}YTjy429$yS#sGi2YqU>ex}sC^zTe4IO1-IjOo}8)^CHDc=jrkO`F8$r*yNS{ z!fSfYr$v=*h;3*c^~`8Q*Z5t~C2E_wGo|t}2hCo7UFG{-Rae7)lVVZZ&z@m@Oc%8% z<+{R}cJ~%5ejRV|&WrFPaenUlYM5`x`Bsr{j*K~FK~D2=9IpC#PqtsH_xIxc+|3?A z{_2G1DpZz@0rYH^&Za}v%78MU416)b=R<_S7z>sT?a={c8w9WovlYy3j|4_+0LFr) zLs%fjg#ulukt>FA;jl;I7YmjST{szOO-3>sxuF=F9s5VtolNXdwKAX#gbcLYW0(8? z(f9ZNFi4-20cBvR7%=T*ko56N(pzgU$GtYf7-F!nU+K_>KuJ5c6K=&@7*?<r@dOwP TmJVTo=pO+~gDPd<PZ{_G6BCVd literal 0 HcmV?d00001 diff --git a/book/SYNC_README.md b/book/SYNC_README.md new file mode 100644 index 00000000..a0a50179 --- /dev/null +++ b/book/SYNC_README.md @@ -0,0 +1,157 @@ +# PAMELA Distributed Synchronization Demo + +Ce dossier contient un exemple de synchronisation distribuée d'instances PAMELA +utilisant RabbitMQ comme broker de messages. + +## Architecture + +``` +┌─────────────────┐ RabbitMQ ┌─────────────────┐ +│ ReplicaA │◄──────────────────►│ ReplicaB │ +│ (Terminal 1) │ fanout exchange │ (Terminal 2) │ +│ │ pamela-library- │ │ +│ ┌───────────┐ │ sync │ ┌───────────┐ │ +│ │ Library │ │ │ │ Library │ │ +│ │ ┌─────┐ │ │ │ │ ┌─────┐ │ │ +│ │ │Book1│ │ │ ◄── ADD Book ──► │ │ │Book1│ │ │ +│ │ │Book2│ │ │ ◄── SET prop ──► │ │ │Book2│ │ │ +│ │ └─────┘ │ │ ◄── REMOVE ────► │ │ └─────┘ │ │ +│ └───────────┘ │ │ └───────────┘ │ +└─────────────────┘ └─────────────────┘ +``` + +## Prérequis + +1. **Java 17+** installé +2. **Docker** installé et lancé +3. **Gradle** (ou utiliser le wrapper `gradlew`) + +## Étapes de Test + +### 1. Démarrer RabbitMQ (Docker) + +```bash +docker run -d --name rabbitmq \ + -p 5672:5672 \ + -p 15672:15672 \ + rabbitmq:3-management +``` + +Accéder à l'interface d'administration : http://localhost:15672 +Identifiants par défaut : `guest` / `guest` + +### 2. Compiler le projet + +```bash +cd book +.\gradlew build +``` + +### 3. Terminal 1 - Lancer ReplicaA + +```bash +.\gradlew run -PmainClass=org.openflexo.testPamela.ReplicaA +``` + +Ou avec Java directement : +```bash +java -cp build/libs/book.jar:../pamela-core/build/libs/* org.openflexo.testPamela.ReplicaA +``` + +Notez l'**ID de la Library** affiché (ex: `a3b4c5d6-...`) + +### 4. Terminal 2 - Lancer ReplicaB + +```bash +.\gradlew run -PmainClass=org.openflexo.testPamela.ReplicaB +``` + +Quand demandé, entrez l'ID de la Library affiché par ReplicaA. + +### 5. Tester la synchronisation + +**Dans Terminal 1 (ReplicaA) :** +``` +[A] > add Harry Potter +[A] ✓ Added: Book(title=Harry Potter) +``` + +**Dans Terminal 2 (ReplicaB) :** (mise à jour automatique) +``` +[B] 📥 Received: ADD on books = Book(title=Harry Potter) +``` + +**Dans Terminal 2 (ReplicaB) :** +``` +[B] > add Le Seigneur des Anneaux +``` + +**Dans Terminal 1 (ReplicaA) :** (mise à jour automatique) +``` +[A] 📥 Received: ADD on books = ... +``` + +## Commandes disponibles + +| Commande | Description | +|----------|-------------| +| `add <titre>` | Ajoute un livre à la bibliothèque | +| `remove <titre>` | Supprime un livre par son titre | +| `list` | Affiche tous les livres | +| `quit` | Quitte l'application | + +## Structure des fichiers + +``` +book/ +├── build.gradle # Dépendances (RabbitMQ, Jackson) +├── SYNC_README.md # Ce fichier +└── src/main/java/org/openflexo/testPamela/ + ├── model/ + │ ├── Book.java # Modèle PAMELA d'un livre + │ ├── Library.java # Modèle PAMELA d'une bibliothèque + │ ├── Novel.java # Sous-type de Book + │ └── Journal.java # Sous-type de Book + ├── App.java # Exemple original simple + ├── ReplicaA.java # Première instance collaborative + └── ReplicaB.java # Seconde instance collaborative +``` + +## Comment ça marche ? + +1. **SyncEditingContext** : Contexte d'édition étendu qui intercepte les modifications +2. **RabbitMQSyncManager** : Gère la connexion à RabbitMQ et la diffusion des messages +3. **ObjectIdentityManager** : Associe chaque objet PAMELA à un UUID unique +4. **SyncOperation** : Représente une opération (CREATE, SET, ADD, REMOVE, DELETE) +5. **VectorClock** : Horloge vectorielle pour l'ordre causal des opérations + +Quand vous faites `library.addToBooks(book)` : +1. Le `ProxyMethodHandler` détecte l'appel au setter +2. Il broadcast une `SyncOperation` via `SyncEditingContext` +3. Le `RabbitMQSyncManager` publie le message JSON sur l'exchange +4. Toutes les réplicas reçoivent le message et appliquent l'opération + +## Dépannage + +### RabbitMQ ne démarre pas +```bash +docker logs rabbitmq +``` + +### Erreur de connexion +Vérifiez que le port 5672 est accessible : +```bash +docker ps | findstr rabbitmq +``` + +### Les messages ne se synchronisent pas +1. Vérifiez que les deux réplicas utilisent le même Library ID +2. Consultez les messages dans RabbitMQ Management UI (http://localhost:15672) +3. Vérifiez l'exchange "pamela-library-sync" + +## Arrêter RabbitMQ + +```bash +docker stop rabbitmq +docker rm rabbitmq +``` diff --git a/book/build.gradle b/book/build.gradle new file mode 100644 index 00000000..2899fcb9 --- /dev/null +++ b/book/build.gradle @@ -0,0 +1,79 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * This generated file contains a sample Java project to get you started. + * For more details take a look at the Java Quickstart chapter in the Gradle + * User Manual available at https://docs.gradle.org/6.6.1/userguide/tutorial_java_projects.html + */ + +plugins { + // Apply the java plugin to add support for Java + id 'java' + + // Apply the application plugin to add support for building a CLI application. + id 'application' +} + +repositories { + maven { + url "https://maven.openflexo.org/artifactory/openflexo-deps/" + } + mavenCentral() +// jcenter() +} + +dependencies { + // Use local pamela-core project (includes the sync package) + implementation project(':pamela-core') + + // RabbitMQ for collaborative synchronization + implementation 'com.rabbitmq:amqp-client:5.20.0' + + // Jackson for JSON serialization + implementation 'com.fasterxml.jackson.core:jackson-databind:2.16.0' + + // Use JUnit test framework + testImplementation 'junit:junit:4.13' +} + +application { + // Define the main class for the application. + // Can be overridden with: gradlew run -PmainClass=org.openflexo.testPamela.ReplicaA + mainClassName = project.hasProperty('mainClass') ? project.property('mainClass') : 'org.openflexo.testPamela.App' +} + +// Task to run ReplicaA +task runReplicaA(type: JavaExec) { + group = 'application' + description = 'Run the first collaborative replica (ReplicaA)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaA' + standardInput = System.in +} + +// Task to run ReplicaB +task runReplicaB(type: JavaExec) { + group = 'application' + description = 'Run the second collaborative replica (ReplicaB)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaB' + standardInput = System.in +} + +// Task to run ReplicaC +task runReplicaC(type: JavaExec) { + group = 'application' + description = 'Run the third collaborative replica (ReplicaC)' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.ReplicaC' + standardInput = System.in +} + +// Task to run the Distributed Feature Demo +task runDemo(type: JavaExec) { + group = 'application' + description = 'Run the distributed features demonstration' + classpath = sourceSets.main.runtimeClasspath + mainClass = 'org.openflexo.testPamela.DistributedFeatureDemo' + standardInput = System.in +} diff --git a/book/gradle/.DS_Store b/book/gradle/.DS_Store new file mode 100644 index 0000000000000000000000000000000000000000..5008ddfcf53c02e82d7eee2e57c38e5672ef89f6 GIT binary patch literal 6148 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a/book/gradle/wrapper/gradle-wrapper.properties b/book/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 00000000..3ae1e2f1 --- /dev/null +++ b/book/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,5 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/book/gradlew b/book/gradlew new file mode 100644 index 00000000..4f906e0c --- /dev/null +++ b/book/gradlew @@ -0,0 +1,185 @@ +#!/usr/bin/env sh + +# +# Copyright 2015 the original author or authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +## +## Gradle start up script for UN*X +## +############################################################################## + +# Attempt to set APP_HOME +# Resolve links: $0 may be a link +PRG="$0" +# Need this for relative symlinks. +while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG=`dirname "$PRG"`"/$link" + fi +done +SAVED="`pwd`" +cd "`dirname \"$PRG\"`/" >/dev/null +APP_HOME="`pwd -P`" +cd "$SAVED" >/dev/null + +APP_NAME="Gradle" +APP_BASE_NAME=`basename "$0"` + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD="maximum" + +warn () { + echo "$*" +} + +die () { + echo + echo "$*" + echo + exit 1 +} + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "`uname`" in + CYGWIN* ) + cygwin=true + ;; + Darwin* ) + darwin=true + ;; + MINGW* ) + msys=true + ;; + NONSTOP* ) + nonstop=true + ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD="java" + which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." +fi + +# Increase the maximum file descriptors if we can. +if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then + MAX_FD_LIMIT=`ulimit -H -n` + if [ $? -eq 0 ] ; then + if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then + MAX_FD="$MAX_FD_LIMIT" + fi + ulimit -n $MAX_FD + if [ $? -ne 0 ] ; then + warn "Could not set maximum file descriptor limit: $MAX_FD" + fi + else + warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT" + fi +fi + +# For Darwin, add options to specify how the application appears in the dock +if $darwin; then + GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\"" +fi + +# For Cygwin or MSYS, switch paths to Windows format before running java +if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then + APP_HOME=`cygpath --path --mixed "$APP_HOME"` + CLASSPATH=`cygpath --path --mixed "$CLASSPATH"` + + JAVACMD=`cygpath --unix "$JAVACMD"` + + # We build the pattern for arguments to be converted via cygpath + ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null` + SEP="" + for dir in $ROOTDIRSRAW ; do + ROOTDIRS="$ROOTDIRS$SEP$dir" + SEP="|" + done + OURCYGPATTERN="(^($ROOTDIRS))" + # Add a user-defined pattern to the cygpath arguments + if [ "$GRADLE_CYGPATTERN" != "" ] ; then + OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)" + fi + # Now convert the arguments - kludge to limit ourselves to /bin/sh + i=0 + for arg in "$@" ; do + CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -` + CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option + + if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition + eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"` + else + eval `echo args$i`="\"$arg\"" + fi + i=`expr $i + 1` + done + case $i in + 0) set -- ;; + 1) set -- "$args0" ;; + 2) set -- "$args0" "$args1" ;; + 3) set -- "$args0" "$args1" "$args2" ;; + 4) set -- "$args0" "$args1" "$args2" "$args3" ;; + 5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;; + 6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;; + 7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;; + 8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;; + 9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;; + esac +fi + +# Escape application args +save () { + for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done + echo " " +} +APP_ARGS=`save "$@"` + +# Collect all arguments for the java command, following the shell quoting and substitution rules +eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS" + +exec "$JAVACMD" "$@" diff --git a/book/gradlew.bat b/book/gradlew.bat new file mode 100644 index 00000000..107acd32 --- /dev/null +++ b/book/gradlew.bat @@ -0,0 +1,89 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%" == "" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%" == "" set DIRNAME=. +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if "%ERRORLEVEL%" == "0" goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if "%ERRORLEVEL%"=="0" goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1 +exit /b 1 + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/book/settings.gradle b/book/settings.gradle new file mode 100644 index 00000000..b23f0f0a --- /dev/null +++ b/book/settings.gradle @@ -0,0 +1,10 @@ +/* + * This file was generated by the Gradle 'init' task. + * + * The settings file is used to specify which projects to include in your build. + * + * Detailed information about configuring a multi-project build in Gradle can be found + * in the user manual at https://docs.gradle.org/6.6.1/userguide/multi_project_builds.html + */ + +rootProject.name = 'book' diff --git a/book/src/main/java/org/openflexo/testPamela/App.java b/book/src/main/java/org/openflexo/testPamela/App.java new file mode 100644 index 00000000..fdfdd4d8 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/App.java @@ -0,0 +1,41 @@ +/* + * This Java source file was generated by the Gradle 'init' task. + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +public class App { + + public Library books; + + public App() throws ModelDefinitionException { + // Instantiate the meta-model + // by computing the closure of concepts graph + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + // Instantiate the factory + PamelaModelFactory factory = new PamelaModelFactory(pamelaMetaModel); + + // Instantiate a book, the Book class has been loaded because Library depends on Book + Book aBook = factory.newInstance(Book.class, "Lord of the ring"); + + this.books = factory.newInstance(Library.class); + this.books.addToBooks(aBook); + System.out.println("result is " + aBook); + if (aBook.isCorrect()) { + System.out.println("result is correct"); + } else { + System.out.println("result is not correct"); + } + } + + public static void main(String[] args) throws ModelDefinitionException { + App app = new App(); + System.out.println("library is " + app.books); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java b/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java new file mode 100644 index 00000000..0fcede1d --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/DistributedFeatureDemo.java @@ -0,0 +1,517 @@ +/* + * PAMELA Distributed Features Demo + * + * This application demonstrates ALL distributed synchronization features: + * + * 1. STATE_REQUEST / STATE_RESPONSE - State sync for new clients + * 2. CREATE - Object creation synchronization + * 3. SET - Property setter synchronization + * 4. ADD - Collection adder synchronization + * 5. REMOVE - Collection remover synchronization + * 6. DELETE - Object deletion synchronization + * 7. VectorClock - Causality tracking + * 8. Auto state request on connect + * + * Run multiple instances to see real-time synchronization! + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; +import java.util.concurrent.atomic.AtomicInteger; + +public class DistributedFeatureDemo { + + private static Library library; + private static PamelaModelFactory factory; + private static SyncEditingContext syncContext; + private static String replicaName; + private static final AtomicInteger bookCounter = new AtomicInteger(1); + + // CloudAMQP configuration + private static final String AMQP_HOST = "rat.rmq2.cloudamqp.com"; + private static final int AMQP_PORT = 5671; + private static final String AMQP_USER = "gcyabtej"; + private static final String AMQP_PASS = "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU"; + private static final String AMQP_VHOST = "gcyabtej"; + + public static void main(String[] args) throws Exception { + printBanner(); + + Scanner scanner = new Scanner(System.in); + + // Get replica name + System.out.print("Enter your replica name (e.g., Alice, Bob, Charlie): "); + replicaName = scanner.nextLine().trim(); + if (replicaName.isEmpty()) { + replicaName = "Replica-" + System.currentTimeMillis() % 1000; + } + + System.out.println(); + System.out.println("[" + replicaName + "] Initializing PAMELA..."); + + // Initialize PAMELA + PamelaMetaModel metaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + factory = new PamelaModelFactory(metaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager + System.out.println("[" + replicaName + "] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host(AMQP_HOST) + .port(AMQP_PORT) + .credentials(AMQP_USER, AMQP_PASS) + .virtualHost(AMQP_VHOST) + .useSsl(true) + .exchangeName("pamela-distributed-demo") + .build(); + + // Setup sync context with auto state request + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add operation listener for visibility + syncManager.addListener(createOperationListener()); + + try { + syncManager.connect(); + System.out.println("[" + replicaName + "] ✓ Connected! Replica ID: " + + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[" + replicaName + "] ✗ Connection failed: " + e.getMessage()); + return; + } + + // Ask if joining existing session or creating new + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ 1. CREATE new library (if you're the first replica) ║"); + System.out.println("║ 2. JOIN existing library (enter Library ID from another) ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.print("Choice [1/2]: "); + + String choice = scanner.nextLine().trim(); + + if ("2".equals(choice)) { + // Join existing library + System.out.print("Enter Library ID: "); + String libraryId = scanner.nextLine().trim(); + + if (!libraryId.isEmpty()) { + // Create local library and register with same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[" + replicaName + "] Registered with Library ID: " + libraryId); + + // Request state from other replicas (KEY FEATURE: STATE_REQUEST) + System.out.println("[" + replicaName + "] 📡 Requesting current state from other replicas..."); + syncContext.requestStateSync(); + + // Wait for state to arrive + Thread.sleep(3000); + System.out.println("[" + replicaName + "] ✓ State sync complete!"); + System.out.println("[" + replicaName + "] Books received: " + library.getBooks().size()); + printLibrary(); + } else { + createNewLibrary(); + } + } else { + createNewLibrary(); + } + + // Print commands help + printHelp(); + + // Interactive command loop + while (true) { + System.out.print("[" + replicaName + "] > "); + String input = scanner.nextLine().trim(); + + if (input.isEmpty()) continue; + + String[] parts = input.split("\\s+", 2); + String command = parts[0].toLowerCase(); + String argument = parts.length > 1 ? parts[1] : ""; + + try { + switch (command) { + case "help": + printHelp(); + break; + + case "add": + // TEST: ADD operation + testAddOperation(argument); + break; + + case "remove": + // TEST: REMOVE operation + testRemoveOperation(argument); + break; + + case "set": + // TEST: SET operation + testSetOperation(argument); + break; + + case "move": + // TEST: REINDEX operation + testMoveOperation(argument); + break; + + case "list": + printLibrary(); + break; + + case "state": + // TEST: STATE_REQUEST + System.out.println("[" + replicaName + "] Requesting state sync..."); + syncContext.requestStateSync(); + break; + + case "info": + printInfo(syncManager); + break; + + case "quit": + case "exit": + System.out.println("[" + replicaName + "] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[" + replicaName + "] Goodbye!"); + return; + + case "demo": + runFullDemo(); + break; + + default: + System.out.println("Unknown command. Type 'help' for available commands."); + } + } catch (Exception e) { + System.out.println("[" + replicaName + "] Error: " + e.getMessage()); + } + } + } + + private static void createNewLibrary() { + library = factory.newInstance(Library.class); + String libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ NEW LIBRARY CREATED ║"); + System.out.println("║ Library ID: " + libraryId); + System.out.println("║ ║"); + System.out.println("║ Share this ID with other replicas to join! ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + /** + * TEST: ADD operation - adds a book to the library + */ + private static void testAddOperation(String title) { + if (title.isEmpty()) { + title = "Book-" + replicaName + "-" + bookCounter.getAndIncrement(); + } + + Book book = factory.newInstance(Book.class, title); + book.setISBN(replicaName + "-" + System.currentTimeMillis()); + book.setPages(100 + (int)(Math.random() * 400)); + + library.addToBooks(book); + + System.out.println("[" + replicaName + "] ✓ ADD: Created and added '" + title + "'"); + System.out.println(" → This triggers CREATE + ADD operations broadcast to all replicas"); + } + + /** + * TEST: REMOVE operation - removes a book from the library + */ + private static void testRemoveOperation(String title) { + if (title.isEmpty()) { + System.out.println("Usage: remove <book title>"); + return; + } + + Book book = library.getBook(title); + if (book != null) { + library.removeFromBooks(book); + System.out.println("[" + replicaName + "] ✓ REMOVE: Removed '" + title + "'"); + System.out.println(" → This triggers REMOVE operation broadcast to all replicas"); + } else { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + System.out.println(" Available books:"); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle()); + } + } + } + + /** + * TEST: SET operation - modifies a book's property + */ + private static void testSetOperation(String args) { + // Format: set <title> <property> <value> + // Example: set MyBook pages 500 + String[] parts = args.split("\\s+", 3); + if (parts.length < 3) { + System.out.println("Usage: set <book title> <property> <value>"); + System.out.println(" Properties: title, isbn, pages"); + System.out.println(" Example: set MyBook pages 500"); + return; + } + + String title = parts[0]; + String property = parts[1].toLowerCase(); + String value = parts[2]; + + Book book = library.getBook(title); + if (book == null) { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + return; + } + + switch (property) { + case "title": + book.setTitle(value); + System.out.println("[" + replicaName + "] ✓ SET: Changed title to '" + value + "'"); + break; + case "isbn": + book.setISBN(value); + System.out.println("[" + replicaName + "] ✓ SET: Changed ISBN to '" + value + "'"); + break; + case "pages": + book.setPages(Integer.parseInt(value)); + System.out.println("[" + replicaName + "] ✓ SET: Changed pages to " + value); + break; + default: + System.out.println("Unknown property: " + property); + return; + } + System.out.println(" → This triggers SET operation broadcast to all replicas"); + } + + /** + * TEST: REINDEX operation - moves a book to a different position + */ + private static void testMoveOperation(String args) { + // Format: move <title> <new index> + String[] parts = args.split("\\s+", 2); + if (parts.length < 2) { + System.out.println("Usage: move <book title> <new index>"); + System.out.println(" Example: move MyBook 0 (moves to first position)"); + return; + } + + String title = parts[0]; + int newIndex = Integer.parseInt(parts[1]); + + Book book = library.getBook(title); + if (book == null) { + System.out.println("[" + replicaName + "] ✗ Book not found: " + title); + return; + } + + library.moveBookToIndex(book, newIndex); + System.out.println("[" + replicaName + "] ✓ MOVE: Moved '" + title + "' to index " + newIndex); + System.out.println(" → This triggers REINDEX operation broadcast to all replicas"); + } + + /** + * Run a full demo of all features + */ + private static void runFullDemo() throws InterruptedException { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ RUNNING FULL DISTRIBUTED FEATURES DEMO ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // 1. ADD - Create and add books + System.out.println("▶ STEP 1: Testing ADD operation (CREATE + ADD)"); + testAddOperation("Demo-Book-1"); + Thread.sleep(500); + testAddOperation("Demo-Book-2"); + Thread.sleep(500); + testAddOperation("Demo-Book-3"); + Thread.sleep(1000); + printLibrary(); + + // 2. SET - Modify properties + System.out.println(); + System.out.println("▶ STEP 2: Testing SET operation"); + testSetOperation("Demo-Book-1 pages 999"); + Thread.sleep(500); + testSetOperation("Demo-Book-2 isbn DEMO-ISBN-123"); + Thread.sleep(1000); + printLibrary(); + + // 3. MOVE - Reorder + System.out.println(); + System.out.println("▶ STEP 3: Testing REINDEX/MOVE operation"); + testMoveOperation("Demo-Book-3 0"); + Thread.sleep(1000); + printLibrary(); + + // 4. REMOVE - Delete + System.out.println(); + System.out.println("▶ STEP 4: Testing REMOVE operation"); + testRemoveOperation("Demo-Book-2"); + Thread.sleep(1000); + printLibrary(); + + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ DEMO COMPLETE! ║"); + System.out.println("║ ║"); + System.out.println("║ If you have another replica connected, it should now have ║"); + System.out.println("║ received all these operations in real-time! ║"); + System.out.println("║ ║"); + System.out.println("║ Try 'state' command on a new replica to test STATE_SYNC ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static void printLibrary() { + System.out.println(); + System.out.println("┌─────────────────────────────────────────────────────────────────┐"); + System.out.println("│ LIBRARY CONTENTS (" + library.getBooks().size() + " books)"); + System.out.println("├─────────────────────────────────────────────────────────────────┤"); + + int idx = 0; + for (Book book : library.getBooks()) { + System.out.printf("│ [%d] %-20s ISBN: %-20s Pages: %d%n", + idx++, + truncate(book.getTitle(), 20), + truncate(book.getISBN(), 20), + book.getPages()); + } + + if (library.getBooks().isEmpty()) { + System.out.println("│ (empty) │"); + } + + System.out.println("└─────────────────────────────────────────────────────────────────┘"); + System.out.println(); + } + + private static void printInfo(RabbitMQSyncManager syncManager) { + System.out.println(); + System.out.println("┌─────────────────────────────────────────────────────────────────┐"); + System.out.println("│ SYNC INFO │"); + System.out.println("├─────────────────────────────────────────────────────────────────┤"); + System.out.println("│ Replica Name: " + replicaName); + System.out.println("│ Replica ID: " + syncManager.getReplicaId()); + System.out.println("│ Connected: " + syncManager.isConnected()); + System.out.println("│ State Recv: " + syncContext.isStateReceived()); + System.out.println("│ Objects: " + syncContext.getIdentityManager().size()); + System.out.println("│ Vector Clock: " + syncManager.getVectorClock()); + System.out.println("└─────────────────────────────────────────────────────────────────┘"); + System.out.println(); + } + + private static void printHelp() { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════╗"); + System.out.println("║ DISTRIBUTED PAMELA COMMANDS ║"); + System.out.println("╠═══════════════════════════════════════════════════════════════╣"); + System.out.println("║ add [title] - Add a new book (tests ADD + CREATE) ║"); + System.out.println("║ remove <title> - Remove a book (tests REMOVE) ║"); + System.out.println("║ set <title> <prop> <val> - Modify property (tests SET) ║"); + System.out.println("║ move <title> <index> - Reorder book (tests REINDEX) ║"); + System.out.println("║ list - Show all books ║"); + System.out.println("║ state - Request state from replicas ║"); + System.out.println("║ info - Show sync information ║"); + System.out.println("║ demo - Run full feature demonstration ║"); + System.out.println("║ quit - Exit ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static void printBanner() { + System.out.println(); + System.out.println("╔═══════════════════════════════════════════════════════════════════════╗"); + System.out.println("║ ║"); + System.out.println("║ ██████╗ █████╗ ███╗ ███╗███████╗██╗ █████╗ ║"); + System.out.println("║ ██╔══██╗██╔══██╗████╗ ████║██╔════╝██║ ██╔══██╗ ║"); + System.out.println("║ ██████╔╝███████║██╔████╔██║█████╗ ██║ ███████║ ║"); + System.out.println("║ ██╔═══╝ ██╔══██║██║╚██╔╝██║██╔══╝ ██║ ██╔══██║ ║"); + System.out.println("║ ██║ ██║ ██║██║ ╚═╝ ██║███████╗███████╗██║ ██║ ║"); + System.out.println("║ ╚═╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝╚══════╝╚═╝ ╚═╝ ║"); + System.out.println("║ ║"); + System.out.println("║ D I S T R I B U T E D S Y N C D E M O ║"); + System.out.println("║ ║"); + System.out.println("║ Testing: STATE_SYNC | CREATE | SET | ADD | REMOVE | REINDEX ║"); + System.out.println("║ ║"); + System.out.println("╚═══════════════════════════════════════════════════════════════════════╝"); + System.out.println(); + } + + private static SyncOperationListener createOperationListener() { + return new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[" + replicaName + "] 📥 RECEIVED: " + operation.getOperationType()); + System.out.println(" Object: " + operation.getObjectId().substring(0, 8) + "..."); + if (operation.getPropertyIdentifier() != null) { + System.out.println(" Property: " + operation.getPropertyIdentifier()); + } + if (operation.getNewValueSerialized() != null) { + System.out.println(" Value: " + truncate(operation.getNewValueSerialized(), 40)); + } + System.out.println(" From: " + operation.getReplicaId().substring(0, 8) + "..."); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onStateRequested(String requestingReplicaId) { + System.out.println(); + System.out.println("[" + replicaName + "] 📡 STATE_REQUEST received from: " + + requestingReplicaId.substring(0, 8) + "..."); + System.out.println(" → Sending current state with " + library.getBooks().size() + " books"); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onStateReceived(String stateSnapshot, String fromReplicaId) { + System.out.println(); + System.out.println("[" + replicaName + "] 📥 STATE_RESPONSE received from: " + + fromReplicaId.substring(0, 8) + "..."); + System.out.println(" → Restoring state..."); + System.out.print("[" + replicaName + "] > "); + } + + @Override + public void onConnected() { + System.out.println("[" + replicaName + "] 🔗 Connected to sync network"); + } + + @Override + public void onDisconnected(String reason) { + System.out.println("[" + replicaName + "] ⚠️ Disconnected: " + reason); + } + + @Override + public void onError(Throwable error) { + System.out.println("[" + replicaName + "] ❌ Error: " + error.getMessage()); + } + }; + } + + private static String truncate(String str, int maxLen) { + if (str == null) return ""; + if (str.length() <= maxLen) return str; + return str.substring(0, maxLen - 3) + "..."; + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaA.java b/book/src/main/java/org/openflexo/testPamela/ReplicaA.java new file mode 100644 index 00000000..d0385abf --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaA.java @@ -0,0 +1,133 @@ +/* + * Replica A - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this first, then start ReplicaB and enter the Library ID. + * After ReplicaB is connected, add books and see them sync! + * + * Prerequisites: + * docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaA { + + private static Library library; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA A ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + SyncEditingContext syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[A] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations from ReplicaB + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[A] 📥 Received from remote: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " value=" + operation.getNewValueSerialized()); + System.out.println("[A] Current library books: " + library.getBooks().size()); + System.out.print("[A] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[A] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[A] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[A] Make sure RabbitMQ is running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management"); + return; + } + + // Create a library (no initial books - wait for ReplicaB to connect first!) + library = factory.newInstance(Library.class); + String libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println(); + System.out.println("[A] Created Library with ID: " + libraryId); + System.out.println(" ⚠️ COPY THIS ID to use in ReplicaB!"); + System.out.println(); + System.out.println(" ➡️ Start ReplicaB now, enter the ID, then add books here!"); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + Scanner scanner = new Scanner(System.in); + while (true) { + System.out.print("[A] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[A] Library: " + library); + System.out.println("[A] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("A-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[A] ✓ Added: " + newBook.getTitle() + " (broadcasting to replicas...)"); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[A] ✓ Removed: " + title); + } else { + System.out.println("[A] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[A] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[A] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[A] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaB.java b/book/src/main/java/org/openflexo/testPamela/ReplicaB.java new file mode 100644 index 00000000..0e62fada --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaB.java @@ -0,0 +1,156 @@ +/* + * Replica B - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this AFTER ReplicaA to receive synchronized updates. + * + * Prerequisites: + * 1. RabbitMQ running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * 2. ReplicaA running and note the Library ID + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaB { + + private static Library library; + private static SyncEditingContext syncContext; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA B ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[B] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[B] 📥 Received: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " = " + operation.getNewValueSerialized()); + System.out.println("[B] Current library: " + library); + System.out.print("[B] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[B] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[B] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[B] Make sure RabbitMQ is running!"); + return; + } + + System.out.println(); + System.out.println("[B] Waiting for Library ID from ReplicaA..."); + System.out.print("[B] Enter Library ID (from ReplicaA): "); + + Scanner scanner = new Scanner(System.in); + String libraryId = scanner.nextLine().trim(); + + if (libraryId.isEmpty()) { + // Create a new library if no ID provided + library = factory.newInstance(Library.class); + libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println("[B] Created new Library with ID: " + libraryId); + } else { + // Create a local library and register with the same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[B] ✓ Registered local Library with shared ID: " + libraryId); + + // Request state from other replicas to get existing books + System.out.println("[B] 📡 Requesting state from other replicas..."); + syncContext.requestStateSync(); + + // Wait a moment for state to arrive + Thread.sleep(2000); + System.out.println("[B] ✓ State sync complete. Books received: " + library.getBooks().size()); + } + + System.out.println(); + System.out.println("[B] Library state: " + library); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("Waiting for updates from ReplicaA..."); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + while (true) { + System.out.print("[B] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[B] Library: " + library); + System.out.println("[B] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("NEW-B-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[B] ✓ Added: " + newBook); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[B] ✓ Removed: " + title); + } else { + System.out.println("[B] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[B] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[B] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[B] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/ReplicaC.java b/book/src/main/java/org/openflexo/testPamela/ReplicaC.java new file mode 100644 index 00000000..c95c014d --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/ReplicaC.java @@ -0,0 +1,148 @@ +/* + * Replica C - Collaborative Library Example + * + * This application demonstrates PAMELA distributed synchronization. + * Run this AFTER ReplicaA to receive synchronized updates (3rd replica). + * + * Prerequisites: + * 1. RabbitMQ running: docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * 2. ReplicaA running and note the Library ID + */ +package org.openflexo.testPamela; + +import org.openflexo.pamela.PamelaMetaModel; +import org.openflexo.pamela.PamelaMetaModelLibrary; +import org.openflexo.pamela.exceptions.ModelDefinitionException; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.testPamela.model.Book; +import org.openflexo.testPamela.model.Library; + +import java.util.Scanner; + +public class ReplicaC { + + private static Library library; + private static SyncEditingContext syncContext; + private static PamelaModelFactory factory; + + public static void main(String[] args) throws Exception { + System.out.println("╔════════════════════════════════════════════════════════════╗"); + System.out.println("║ PAMELA Distributed Library - REPLICA C ║"); + System.out.println("╚════════════════════════════════════════════════════════════╝"); + System.out.println(); + + // Instantiate the meta-model + PamelaMetaModel pamelaMetaModel = PamelaMetaModelLibrary.retrieveMetaModel(Library.class); + + // Instantiate the factory with sync context + factory = new PamelaModelFactory(pamelaMetaModel); + syncContext = new SyncEditingContext(factory); + factory.setEditingContext(syncContext); + + // Configure RabbitMQ sync manager (CloudAMQP) + System.out.println("[C] Connecting to CloudAMQP..."); + RabbitMQSyncManager syncManager = RabbitMQSyncManager.builder() + .host("rat.rmq2.cloudamqp.com") + .port(5671) + .credentials("gcyabtej", "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU") + .virtualHost("gcyabtej") + .useSsl(true) + .exchangeName("pamela-library-sync") + .build(); + + syncContext.setSyncManager(syncManager); + syncManager.addListener(syncContext); + + // Add a listener to show received operations + syncManager.addListener(new SyncOperationListener() { + @Override + public void onOperationReceived(SyncOperation operation) { + System.out.println(); + System.out.println("[C] 📥 Received: " + operation.getOperationType() + + " on " + operation.getPropertyIdentifier() + + " = " + operation.getNewValueSerialized()); + System.out.println("[C] Current library: " + library); + System.out.print("[C] > "); + } + }); + + try { + syncManager.connect(); + System.out.println("[C] ✓ Connected to RabbitMQ as replica: " + syncManager.getReplicaId().substring(0, 8)); + } catch (Exception e) { + System.err.println("[C] ✗ Failed to connect to RabbitMQ: " + e.getMessage()); + System.err.println("[C] Make sure RabbitMQ is running!"); + return; + } + + System.out.println(); + System.out.println("[C] Waiting for Library ID from ReplicaA..."); + System.out.print("[C] Enter Library ID (from ReplicaA): "); + + Scanner scanner = new Scanner(System.in); + String libraryId = scanner.nextLine().trim(); + + if (libraryId.isEmpty()) { + // Create a new library if no ID provided + library = factory.newInstance(Library.class); + libraryId = syncContext.getIdentityManager().getOrCreateObjectId(library); + System.out.println("[C] Created new Library with ID: " + libraryId); + } else { + // Create a local library and register with the same ID + library = factory.newInstance(Library.class); + syncContext.getIdentityManager().registerObject(library, libraryId); + System.out.println("[C] ✓ Registered local Library with shared ID: " + libraryId); + } + + System.out.println(); + System.out.println("[C] Library state: " + library); + System.out.println(); + System.out.println("════════════════════════════════════════════════════════════════"); + System.out.println("Commands: 'add <title>' | 'remove <title>' | 'list' | 'quit'"); + System.out.println("Waiting for updates from ReplicaA..."); + System.out.println("════════════════════════════════════════════════════════════════"); + + // Interactive mode + while (true) { + System.out.print("[C] > "); + String input = scanner.nextLine().trim(); + + if (input.equalsIgnoreCase("quit") || input.equalsIgnoreCase("exit")) { + break; + } else if (input.equalsIgnoreCase("list")) { + System.out.println("[C] Library: " + library); + System.out.println("[C] Books count: " + library.getBooks().size()); + for (Book b : library.getBooks()) { + System.out.println(" - " + b.getTitle() + " (ISBN: " + b.getISBN() + ")"); + } + } else if (input.toLowerCase().startsWith("add ")) { + String title = input.substring(4).trim(); + if (!title.isEmpty()) { + Book newBook = factory.newInstance(Book.class, title); + newBook.setISBN("NEW-C-" + System.currentTimeMillis()); + library.addToBooks(newBook); + System.out.println("[C] ✓ Added: " + newBook); + } + } else if (input.toLowerCase().startsWith("remove ")) { + String title = input.substring(7).trim(); + Book bookToRemove = library.getBook(title); + if (bookToRemove != null) { + library.removeFromBooks(bookToRemove); + System.out.println("[C] ✓ Removed: " + title); + } else { + System.out.println("[C] ✗ Book not found: " + title); + } + } else if (!input.isEmpty()) { + System.out.println("[C] Unknown command. Use: add <title>, remove <title>, list, quit"); + } + } + + System.out.println("[C] Disconnecting..."); + syncManager.disconnect(); + System.out.println("[C] Goodbye!"); + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Book.java b/book/src/main/java/org/openflexo/testPamela/model/Book.java new file mode 100644 index 00000000..c140cc6a --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Book.java @@ -0,0 +1,74 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; +import org.checkerframework.checker.units.qual.s; +import org.openflexo.pamela.AccessibleProxyObject; + +@ModelEntity +@Imports({@Import(org.openflexo.testPamela.model.Novel.class), @Import(org.openflexo.testPamela.model.Journal.class)}) +@ImplementationClass(Book.BookImpl.class) +public interface Book extends AccessibleProxyObject { + + static final String TITLE = "title"; + static final String ISBN = "ISBN"; + static final String PAGES = "pages"; + + @Initializer + Book init(@Parameter(TITLE)String aTitle); + + @Getter(TITLE) + String getTitle(); + + @Setter(TITLE) + void setTitle(String aTitle); + + @Getter(ISBN) + String getISBN(); + + @Setter(ISBN) + void setISBN(String value); + + @Getter(PAGES) + Integer getPages(); + + @Setter(PAGES) + void setPages(Integer value); + + boolean isCorrect(); + + // Provides a partial implementation for Book + static abstract class BookImpl implements Book { + @Override + public String getISBN() { + String isbn = (String) performSuperGetter(ISBN); + if (isbn == null) { + return "Unknown"; + } + return isbn; + } + + @Override + public Integer getPages() { + Integer pages = (Integer) performSuperGetter(PAGES); + if (pages == null) { + return 100; + } + return pages; + } + + @Override + public String toString() { + String title = getTitle(); + String isbn = getISBN(); + Integer pages = getPages(); + return "Book(" + title + "," + isbn + "," + pages + "," + getClass().getSimpleName() + ")"; + } + + public boolean isCorrect() { + return getTitle() != null && getISBN() != null; + } + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Journal.java b/book/src/main/java/org/openflexo/testPamela/model/Journal.java new file mode 100644 index 00000000..152dcb49 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Journal.java @@ -0,0 +1,10 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; + +@ModelEntity +public interface Journal extends Book { +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Library.java b/book/src/main/java/org/openflexo/testPamela/model/Library.java new file mode 100644 index 00000000..74f1c9cc --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Library.java @@ -0,0 +1,64 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; +import org.openflexo.pamela.annotations.Getter.Cardinality; +import org.openflexo.pamela.AccessibleProxyObject; + +import java.io.File; +import java.io.FileFilter; +import java.util.Iterator; +import java.util.List; + +@ModelEntity +@ImplementationClass(Library.LibraryImpl.class) +public interface Library extends AccessibleProxyObject, Iterable<Book> { + + static String BOOKS = "books"; + static String FILE = "file"; + + @Getter(value = BOOKS, cardinality = Cardinality.LIST) + List<Book> getBooks(); + + @Getter(value = FILE, ignoreType = true) + FileFilter getFile(); + + @Setter(FILE) + void setFile(FileFilter file); + + @Adder(BOOKS) + void addToBooks(Book aBook); + + @Remover(BOOKS) + void removeFromBooks(Book aBook); + + @Reindexer(BOOKS) + void moveBookToIndex(Book aBook, int index); + + @Finder(collection = BOOKS, attribute = "title") + Book getBook(String title); + + // Provides a partial implementation for Book + static abstract class LibraryImpl implements Library { + @Override + public String toString() { + StringBuilder str = new StringBuilder("["); + boolean first =true; + for (Book b : getBooks()) { + if (!first) { + str.append(","); + } + str.append(b); + } + str.append("]"); + return str.toString(); + } + + @Override + public Iterator<Book> iterator() { + return getBooks().iterator(); + } + } +} diff --git a/book/src/main/java/org/openflexo/testPamela/model/Novel.java b/book/src/main/java/org/openflexo/testPamela/model/Novel.java new file mode 100644 index 00000000..99271fd3 --- /dev/null +++ b/book/src/main/java/org/openflexo/testPamela/model/Novel.java @@ -0,0 +1,10 @@ +/* + * A book pamela model + */ +package org.openflexo.testPamela.model; + +import org.openflexo.pamela.annotations.*; + +@ModelEntity +public interface Novel extends Book { +} diff --git a/book/src/test/java/org/openflexo/testPamela/AppTest.java b/book/src/test/java/org/openflexo/testPamela/AppTest.java new file mode 100644 index 00000000..968269db --- /dev/null +++ b/book/src/test/java/org/openflexo/testPamela/AppTest.java @@ -0,0 +1,38 @@ +/* + * This Java source file was generated by the Gradle 'init' task. + */ +package org.openflexo.testPamela; + +import org.junit.Test; +import static org.junit.Assert.*; +import org.openflexo.testPamela.model.Book; +import org.openflexo.pamela.exceptions.ModelDefinitionException; + +public class AppTest { + + @Test + public void testLord() throws ModelDefinitionException { + App classUnderTest = new App(); + boolean found = false; + for (Book b : classUnderTest.books) { + if (b.getTitle().equals("Lord of the ring")) { + found = true; + break; + } + } + assertTrue("app should have 'Lord of the ring'", found); + } + + @Test + public void testOther() throws ModelDefinitionException { + App classUnderTest = new App(); + boolean found = false; + for (Book b : classUnderTest.books) { + if (b.getTitle().equals("God of the ring")) { + found = true; + break; + } + } + assertFalse("app should not have 'God of the ring'", found); + } +} diff --git a/pamela-core/build.gradle b/pamela-core/build.gradle index 5090131e..e2e5dcde 100644 --- a/pamela-core/build.gradle +++ b/pamela-core/build.gradle @@ -6,6 +6,11 @@ dependencies { // Lots of test errors when using 3.30.2 // Error when using 3.23 (see below) + // RabbitMQ for collaborative synchronization + api group: 'com.rabbitmq', name: 'amqp-client', version: '5.20.0' + + // Jackson for JSON serialization of sync operations + api group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.16.0' } // /Users/fdagnat/git/pamela/pamela-core/src/main/java/org/openflexo/pamela/factory/ModelFactory.java:399: error: incompatible types: Class<CAP#1> cannot be converted to Class<? extends I> // return proxyFactory.getSuperclass(); diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java index 7a752950..e62e35e9 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/PamelaModelFactory.java @@ -66,6 +66,7 @@ import org.openflexo.pamela.model.ModelProperty; import org.openflexo.pamela.model.StringConverterLibrary.Converter; import org.openflexo.pamela.undo.CreateCommand; +import org.openflexo.pamela.sync.SyncEditingContext; import org.openflexo.pamela.xml.XMLSaxDeserializer; import org.openflexo.pamela.xml.XMLSerializer; @@ -451,6 +452,16 @@ public <I> I newInstance(Class<I> implementedInterface, Object... args) { if (getEditingContext().getUndoManager() != null) { getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); } + // Broadcast CREATE operation for collaborative sync + if (getEditingContext() instanceof SyncEditingContext) { + SyncEditingContext syncContext = (SyncEditingContext) getEditingContext(); + if (!syncContext.isApplyingRemoteOperation()) { + ProxyMethodHandler<?> handler = getHandler(returned); + if (handler != null) { + handler.broadcastCreateOperation(); + } + } + } } // this.getModelContext().getPatternContext().leavingConstructor(); getModelContext().notifiedNewInstance(returned, getModelEntityForInstance(returned)); @@ -491,6 +502,16 @@ public <I> I _newInstance(Class<I> implementedInterface, boolean useExtended, Ob if (getEditingContext().getUndoManager() != null) { getEditingContext().getUndoManager().addEdit(new CreateCommand<>(returned, proxyFactory.getModelEntity(), this)); } + // Broadcast CREATE operation for collaborative sync + if (getEditingContext() instanceof SyncEditingContext) { + SyncEditingContext syncContext = (SyncEditingContext) getEditingContext(); + if (!syncContext.isApplyingRemoteOperation()) { + ProxyMethodHandler<?> handler = getHandler(returned); + if (handler != null) { + handler.broadcastCreateOperation(); + } + } + } } return returned; } catch (IllegalArgumentException e) { diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java index 61c76901..4a419928 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java @@ -122,6 +122,7 @@ import org.openflexo.pamela.undo.RemoveCommand; import org.openflexo.pamela.undo.SetCommand; import org.openflexo.pamela.undo.UndoManager; +import org.openflexo.pamela.sync.SyncEditingContext; import org.openflexo.toolbox.HasPropertyChangeSupport; import com.google.common.base.Defaults; @@ -1064,6 +1065,11 @@ else if (property.getCardinality() == Cardinality.LIST) { getUndoManager().addEdit(new DeleteCommand<>(getObject(), getModelEntity(), getModelFactory())); } + // Broadcast delete operation to other replicas + if (trackAtomicEdit) { + broadcastDeleteOperation(); + } + deleted = true; deleting = false; @@ -1419,6 +1425,11 @@ private <T> void internallyInvokeSetter(ModelProperty<? super I> property, Setta } } propertyImplementation.set(value); + + // Broadcast sync operation if connected + if (trackAtomicEdit && oldValue != value) { + broadcastSetOperation(property, oldValue, value); + } } private <T> void internallyInvokeUpdater(ModelProperty<? super I> property, SettablePropertyImplementation<I, T> propertyImplementation, @@ -1439,6 +1450,11 @@ private <T> void internallyInvokeAdder(ModelProperty<? super I> property, Multip getUndoManager().addEdit(new AddCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); } propertyImplementation.addTo(value, index); + + // Broadcast sync operation if connected + if (trackAtomicEdit) { + broadcastAddOperation(property, value, index); + } } private <T> void internallyInvokeRemover(ModelProperty<? super I> property, MultiplePropertyImplementation<I, T> propertyImplementation, @@ -1448,6 +1464,11 @@ private <T> void internallyInvokeRemover(ModelProperty<? super I> property, Mult getUndoManager().addEdit(new RemoveCommand<>(getObject(), getModelEntity(), property, value, getModelFactory())); } propertyImplementation.removeFrom(value); + + // Broadcast sync operation if connected + if (trackAtomicEdit) { + broadcastRemoveOperation(property, value); + } } private <T> void internallyInvokeReindexer(ModelProperty<? super I> property, @@ -2637,4 +2658,79 @@ private void checkOnExit(Method method, Object[] args) { } + // ======================================================================== + // Synchronization support methods for collaborative editing via RabbitMQ + // ======================================================================== + + /** + * Get the SyncEditingContext if available + * + * @return SyncEditingContext or null if not in sync mode + */ + private SyncEditingContext getSyncEditingContext() { + EditingContext ctx = getEditingContext(); + if (ctx instanceof SyncEditingContext) { + return (SyncEditingContext) ctx; + } + return null; + } + + /** + * Check if we should broadcast operations (not applying remote operations) + */ + private boolean shouldBroadcast() { + SyncEditingContext syncCtx = getSyncEditingContext(); + return syncCtx != null && !syncCtx.isApplyingRemoteOperation(); + } + + /** + * Broadcast a SET operation to other replicas + */ + private void broadcastSetOperation(ModelProperty<? super I> property, Object oldValue, Object newValue) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastSet(getObject(), property, oldValue, newValue); + } + } + + /** + * Broadcast an ADD operation to other replicas + */ + private void broadcastAddOperation(ModelProperty<? super I> property, Object addedValue, int index) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastAdd(getObject(), property, addedValue, index); + } + } + + /** + * Broadcast a REMOVE operation to other replicas + */ + private void broadcastRemoveOperation(ModelProperty<? super I> property, Object removedValue) { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastRemove(getObject(), property, removedValue); + } + } + + /** + * Broadcast a DELETE operation to other replicas + */ + public void broadcastDeleteOperation() { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastDelete(getObject()); + } + } + + /** + * Broadcast a CREATE operation to other replicas + */ + public void broadcastCreateOperation() { + SyncEditingContext syncCtx = getSyncEditingContext(); + if (syncCtx != null && !syncCtx.isApplyingRemoteOperation()) { + syncCtx.broadcastCreate(getObject(), getModelEntity().getImplementedInterface().getName()); + } + } + } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java new file mode 100644 index 00000000..ae936473 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/ObjectIdentityManager.java @@ -0,0 +1,167 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.util.Map; +import java.util.UUID; +import java.util.concurrent.ConcurrentHashMap; + +/** + * Manages unique identifiers for PAMELA objects across distributed instances. + * Each object gets a UUID that is stable across all replicas. + * + * @author PAMELA Team + */ +public class ObjectIdentityManager { + + // Maps objects to their unique IDs + private final Map<Object, String> objectToId = new ConcurrentHashMap<>(); + + // Maps IDs back to objects + private final Map<String, Object> idToObject = new ConcurrentHashMap<>(); + + /** + * Register an object with a new generated UUID + * + * @param object the object to register + * @return the generated UUID + */ + public String registerObject(Object object) { + String existingId = objectToId.get(object); + if (existingId != null) { + return existingId; + } + + String newId = UUID.randomUUID().toString(); + objectToId.put(object, newId); + idToObject.put(newId, object); + return newId; + } + + /** + * Register an object with a specific ID (used when receiving remote objects) + * + * @param object the object to register + * @param objectId the specific ID to use + */ + public void registerObject(Object object, String objectId) { + objectToId.put(object, objectId); + idToObject.put(objectId, object); + } + + /** + * Get the ID for an object + * + * @param object the object + * @return the object's ID, or null if not registered + */ + public String getObjectId(Object object) { + return objectToId.get(object); + } + + /** + * Get the ID for an object, registering it if necessary + * + * @param object the object + * @return the object's ID + */ + public String getOrCreateObjectId(Object object) { + String id = objectToId.get(object); + if (id == null) { + id = registerObject(object); + } + return id; + } + + /** + * Get an object by its ID + * + * @param objectId the object ID + * @return the object, or null if not found + */ + public Object getObject(String objectId) { + return idToObject.get(objectId); + } + + /** + * Check if an object is registered + * + * @param object the object + * @return true if registered + */ + public boolean isRegistered(Object object) { + return objectToId.containsKey(object); + } + + /** + * Check if an ID is registered + * + * @param objectId the object ID + * @return true if registered + */ + public boolean hasObject(String objectId) { + return idToObject.containsKey(objectId); + } + + /** + * Unregister an object + * + * @param object the object to unregister + */ + public void unregisterObject(Object object) { + String id = objectToId.remove(object); + if (id != null) { + idToObject.remove(id); + } + } + + /** + * Unregister an object by ID + * + * @param objectId the object ID + */ + public void unregisterById(String objectId) { + Object object = idToObject.remove(objectId); + if (object != null) { + objectToId.remove(object); + } + } + + /** + * Clear all registrations + */ + public void clear() { + objectToId.clear(); + idToObject.clear(); + } + + /** + * Get the number of registered objects + * + * @return the count + */ + public int size() { + return objectToId.size(); + } + + /** + * Get all registered objects as a map from ID to object. + * Returns a copy of the internal map to prevent modification. + * + * @return a map of object ID to object + */ + public Map<String, Object> getAllObjects() { + return new ConcurrentHashMap<>(idToObject); + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java new file mode 100644 index 00000000..bdc972a1 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/RabbitMQSyncManager.java @@ -0,0 +1,505 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import com.rabbitmq.client.*; + +import java.io.IOException; +import java.util.ArrayList; +import java.util.List; +import java.util.UUID; +import java.util.concurrent.CopyOnWriteArrayList; +import java.util.concurrent.TimeoutException; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * RabbitMQ-based synchronization manager for PAMELA collaborative editing. + * Handles publishing operations to the message broker and consuming operations from other replicas. + * + * @author PAMELA Team + */ +public class RabbitMQSyncManager implements SyncManager, AutoCloseable { + + private static final Logger logger = Logger.getLogger(RabbitMQSyncManager.class.getName()); + + // RabbitMQ connection settings + private final String host; + private final int port; + private final String username; + private final String password; + private final String virtualHost; + private final boolean useSsl; + + // Exchange and queue configuration + private final String exchangeName; + private final String routingKey; + + // Unique identifier for this replica + private final String replicaId; + + // Vector clock for this replica + private final VectorClock vectorClock; + + // RabbitMQ connection and channel + private Connection connection; + private Channel publishChannel; + private Channel consumeChannel; + private String queueName; + + // Listeners for received operations + private final List<SyncOperationListener> listeners = new CopyOnWriteArrayList<>(); + + // Connection state + private volatile boolean connected = false; + private volatile boolean closing = false; + + /** + * Create a RabbitMQ sync manager with default settings + */ + public RabbitMQSyncManager() { + this("localhost", 5672, "guest", "guest", "/", "pamela.sync", "operations", false); + } + + /** + * Create a RabbitMQ sync manager with custom settings + */ + public RabbitMQSyncManager(String host, int port, String username, String password, + String virtualHost, String exchangeName, String routingKey, boolean useSsl) { + this.host = host; + this.port = port; + this.username = username; + this.password = password; + this.virtualHost = virtualHost; + this.exchangeName = exchangeName; + this.routingKey = routingKey; + this.useSsl = useSsl; + this.replicaId = UUID.randomUUID().toString(); + this.vectorClock = new VectorClock(); + } + + /** + * Get the unique replica identifier + */ + public String getReplicaId() { + return replicaId; + } + + /** + * Get the current vector clock + */ + public VectorClock getVectorClock() { + return vectorClock; + } + + /** + * Check if connected to RabbitMQ + */ + public boolean isConnected() { + return connected; + } + + /** + * Connect to RabbitMQ and start consuming messages + */ + public void connect() throws IOException, TimeoutException { + if (connected) { + logger.warning("Already connected to RabbitMQ"); + return; + } + + ConnectionFactory factory = new ConnectionFactory(); + factory.setHost(host); + factory.setPort(port); + factory.setUsername(username); + factory.setPassword(password); + factory.setVirtualHost(virtualHost); + + // Enable SSL if configured + if (useSsl) { + try { + factory.useSslProtocol(); + } catch (Exception e) { + throw new IOException("Failed to enable SSL", e); + } + } + + // Enable automatic recovery + factory.setAutomaticRecoveryEnabled(true); + factory.setNetworkRecoveryInterval(5000); + + connection = factory.newConnection("PAMELA-" + replicaId.substring(0, 8)); + + // Create channels for publishing and consuming + publishChannel = connection.createChannel(); + consumeChannel = connection.createChannel(); + + // Declare the fanout exchange for broadcast + publishChannel.exchangeDeclare(exchangeName, BuiltinExchangeType.FANOUT, true); + + // Create an exclusive queue for this replica + queueName = consumeChannel.queueDeclare().getQueue(); + consumeChannel.queueBind(queueName, exchangeName, routingKey); + + // Set up consumer + DeliverCallback deliverCallback = (consumerTag, delivery) -> { + if (closing) return; + + try { + SyncOperation operation = SyncOperationSerializer.deserializeFromBytes(delivery.getBody()); + + // Ignore operations from this replica + if (replicaId.equals(operation.getReplicaId())) { + return; + } + + // Handle STATE_REQUEST and STATE_RESPONSE specially + if (operation.getOperationType() == SyncOperation.OperationType.STATE_REQUEST) { + // Another replica is requesting state + notifyStateRequested(operation.getReplicaId()); + return; + } + + if (operation.getOperationType() == SyncOperation.OperationType.STATE_RESPONSE) { + // Check if this response is for us (targetReplicaId stored in propertyIdentifier) + String targetReplicaId = operation.getPropertyIdentifier(); + if (targetReplicaId == null || targetReplicaId.equals(replicaId)) { + notifyStateReceived(operation.getNewValueSerialized(), operation.getReplicaId()); + } + return; + } + + // Update our vector clock + if (operation.getVectorClock() != null) { + vectorClock.merge(operation.getVectorClock()); + } + + // Notify listeners + for (SyncOperationListener listener : listeners) { + try { + listener.onOperationReceived(operation); + } catch (Exception e) { + logger.log(Level.SEVERE, "Error in operation listener", e); + } + } + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to deserialize operation", e); + notifyError(e); + } + }; + + CancelCallback cancelCallback = consumerTag -> { + if (!closing) { + logger.warning("Consumer cancelled: " + consumerTag); + notifyDisconnected("Consumer cancelled"); + } + }; + + consumeChannel.basicConsume(queueName, true, deliverCallback, cancelCallback); + + connected = true; + logger.info("Connected to RabbitMQ at " + host + ":" + port + " as replica " + replicaId); + notifyConnected(); + } + + /** + * Publish a synchronization operation to all replicas + * + * @param operation the operation to publish + */ + @Override + public void publishOperation(SyncOperation operation) { + if (!connected) { + logger.warning("Cannot publish: not connected to RabbitMQ"); + return; + } + + try { + // Increment our vector clock + vectorClock.increment(replicaId); + + // Create a new operation with the updated vector clock + SyncOperation operationWithClock = new SyncOperation.Builder(operation.getOperationType()) + .operationId(operation.getOperationId()) + .timestamp(operation.getTimestamp()) + .replicaId(operation.getReplicaId()) + .objectId(operation.getObjectId()) + .entityType(operation.getEntityType()) + .propertyIdentifier(operation.getPropertyIdentifier()) + .oldValue(operation.getOldValueSerialized()) + .newValue(operation.getNewValueSerialized()) + .valueType(operation.getValueType()) + .index(operation.getIndex()) + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(operationWithClock); + + // Publish with persistent delivery mode + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) // persistent + .contentType("application/json") + .correlationId(operation.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + + logger.fine("Published operation: " + operation); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize operation", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish operation", e); + notifyError(e); + } + } + + /** + * Add a listener for synchronization operations + */ + public void addListener(SyncOperationListener listener) { + listeners.add(listener); + } + + /** + * Remove a listener + */ + public void removeListener(SyncOperationListener listener) { + listeners.remove(listener); + } + + /** + * Disconnect from RabbitMQ + */ + public void disconnect() { + if (!connected) { + return; + } + + closing = true; + + try { + if (consumeChannel != null && consumeChannel.isOpen()) { + consumeChannel.close(); + } + if (publishChannel != null && publishChannel.isOpen()) { + publishChannel.close(); + } + if (connection != null && connection.isOpen()) { + connection.close(); + } + } catch (IOException | TimeoutException e) { + logger.log(Level.WARNING, "Error during disconnect", e); + } + + connected = false; + closing = false; + logger.info("Disconnected from RabbitMQ"); + notifyDisconnected("Manual disconnect"); + } + + @Override + public void close() { + disconnect(); + } + + private void notifyConnected() { + for (SyncOperationListener listener : listeners) { + try { + listener.onConnected(); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in connection listener", e); + } + } + } + + private void notifyDisconnected(String reason) { + for (SyncOperationListener listener : listeners) { + try { + listener.onDisconnected(reason); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in disconnection listener", e); + } + } + } + + private void notifyError(Throwable error) { + for (SyncOperationListener listener : listeners) { + try { + listener.onError(error); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in error listener", e); + } + } + } + + private void notifyStateRequested(String requestingReplicaId) { + for (SyncOperationListener listener : listeners) { + try { + listener.onStateRequested(requestingReplicaId); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in state request listener", e); + } + } + } + + private void notifyStateReceived(String stateSnapshot, String fromReplicaId) { + for (SyncOperationListener listener : listeners) { + try { + listener.onStateReceived(stateSnapshot, fromReplicaId); + } catch (Exception e) { + logger.log(Level.WARNING, "Error in state received listener", e); + } + } + } + + /** + * Request the current state from other replicas. + * Used when a new client joins and needs to synchronize. + */ + @Override + public void requestState() { + if (!connected) { + logger.warning("Cannot request state: not connected to RabbitMQ"); + return; + } + + try { + SyncOperation stateRequest = new SyncOperation.Builder(SyncOperation.OperationType.STATE_REQUEST) + .replicaId(replicaId) + .objectId("state-request") + .entityType("StateRequest") + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(stateRequest); + + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) + .contentType("application/json") + .correlationId(stateRequest.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + logger.info("Requested state from other replicas"); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize state request", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish state request", e); + notifyError(e); + } + } + + /** + * Send the current state as a response to a state request. + * + * @param stateSnapshot the serialized state snapshot + * @param targetReplicaId the replica that requested the state (optional, null for broadcast) + */ + @Override + public void sendStateResponse(String stateSnapshot, String targetReplicaId) { + if (!connected) { + logger.warning("Cannot send state response: not connected to RabbitMQ"); + return; + } + + try { + SyncOperation stateResponse = new SyncOperation.Builder(SyncOperation.OperationType.STATE_RESPONSE) + .replicaId(replicaId) + .objectId("state-response") + .entityType("StateResponse") + .propertyIdentifier(targetReplicaId) // Store target replica ID here + .newValue(stateSnapshot) + .vectorClock(vectorClock.copy()) + .build(); + + byte[] body = SyncOperationSerializer.serializeToBytes(stateResponse); + + AMQP.BasicProperties props = new AMQP.BasicProperties.Builder() + .deliveryMode(2) + .contentType("application/json") + .correlationId(stateResponse.getOperationId()) + .build(); + + publishChannel.basicPublish(exchangeName, routingKey, props, body); + logger.info("Sent state response to replica: " + (targetReplicaId != null ? targetReplicaId : "all")); + + } catch (SyncOperationSerializer.SyncSerializationException e) { + logger.log(Level.SEVERE, "Failed to serialize state response", e); + } catch (IOException e) { + logger.log(Level.SEVERE, "Failed to publish state response", e); + notifyError(e); + } + } + + /** + * Builder for creating RabbitMQSyncManager instances + */ + public static Builder builder() { + return new Builder(); + } + + public static class Builder { + private String host = "localhost"; + private int port = 5672; + private String username = "guest"; + private String password = "guest"; + private String virtualHost = "/"; + private String exchangeName = "pamela.sync"; + private String routingKey = "operations"; + private boolean useSsl = false; + + public Builder host(String host) { + this.host = host; + return this; + } + + public Builder port(int port) { + this.port = port; + return this; + } + + public Builder credentials(String username, String password) { + this.username = username; + this.password = password; + return this; + } + + public Builder virtualHost(String virtualHost) { + this.virtualHost = virtualHost; + return this; + } + + public Builder exchangeName(String exchangeName) { + this.exchangeName = exchangeName; + return this; + } + + public Builder routingKey(String routingKey) { + this.routingKey = routingKey; + return this; + } + + public Builder useSsl(boolean useSsl) { + this.useSsl = useSsl; + return this; + } + + public RabbitMQSyncManager build() { + return new RabbitMQSyncManager(host, port, username, password, virtualHost, exchangeName, routingKey, useSsl); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java new file mode 100644 index 00000000..7f6f3fbd --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -0,0 +1,1054 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import org.openflexo.pamela.factory.EditingContextImpl; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.factory.ProxyMethodHandler; +import org.openflexo.pamela.model.ModelProperty; + +import java.util.ArrayList; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * Synchronized editing context that broadcasts PAMELA operations via RabbitMQ. + * This class extends the standard EditingContext to add real-time collaborative + * synchronization capabilities. + * + * @author PAMELA Team + */ +public class SyncEditingContext extends EditingContextImpl implements SyncOperationListener { + + private static final Logger logger = Logger.getLogger(SyncEditingContext.class.getName()); + + private SyncManager syncManager; + private final ObjectIdentityManager identityManager; + private final SyncValueSerializer valueSerializer; + private PamelaModelFactory modelFactory; + + // Flag to prevent recursive sync when applying remote operations + private final ThreadLocal<Boolean> applyingRemoteOperation = ThreadLocal.withInitial(() -> false); + + // Buffer for operations during object creation (ensures CREATE is sent before SETs) + // Key: objectId, Value: list of buffered operations + private final Map<String, List<SyncOperation>> pendingOperations = new ConcurrentHashMap<>(); + + // Track objects for which CREATE has been sent (by objectId) + private final Map<String, Boolean> createdObjects = new ConcurrentHashMap<>(); + + // Flag to automatically request state from other replicas on connection + private boolean autoRequestStateOnConnect = false; + + // Flag to track if state has been received (to avoid multiple requests) + private volatile boolean stateReceived = false; + + /** + * Create a synchronized editing context without a sync manager. + * Call setSyncManager() to set one later. + */ + public SyncEditingContext() { + super(); + this.syncManager = null; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + } + + /** + * Create a synchronized editing context with a PamelaModelFactory. + * Call setSyncManager() to set a sync manager later. + */ + public SyncEditingContext(PamelaModelFactory modelFactory) { + super(); + this.modelFactory = modelFactory; + this.syncManager = null; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + } + + /** + * Create a synchronized editing context with custom sync manager + */ + public SyncEditingContext(SyncManager syncManager) { + super(); + this.syncManager = syncManager; + this.identityManager = new ObjectIdentityManager(); + this.valueSerializer = new SyncValueSerializer(); + if (this.syncManager != null) { + this.syncManager.addListener(this); + } + } + + /** + * Set the model factory for this context + */ + public void setModelFactory(PamelaModelFactory modelFactory) { + this.modelFactory = modelFactory; + } + + /** + * Get the sync manager + */ + public SyncManager getSyncManager() { + return syncManager; + } + + /** + * Set the sync manager + */ + public void setSyncManager(SyncManager syncManager) { + this.syncManager = syncManager; + if (this.syncManager != null) { + this.syncManager.addListener(this); + } + } + + /** + * Get the identity manager + */ + public ObjectIdentityManager getIdentityManager() { + return identityManager; + } + + /** + * Get the replica ID + */ + public String getReplicaId() { + return syncManager != null ? syncManager.getReplicaId() : null; + } + + /** + * Check if currently applying a remote operation + */ + public boolean isApplyingRemoteOperation() { + return applyingRemoteOperation.get(); + } + + /** + * Get the interface name for a PAMELA object. + * Returns the implemented interface name (e.g., "org.example.Book") instead of + * the proxy class name (e.g., "Book$BookImpl_$$_jvst806_1"). + */ + private <I> String getEntityTypeName(I object) { + if (modelFactory != null && modelFactory.isProxyObject(object)) { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + return handler.getModelEntity().getImplementedInterface().getName(); + } + } + return object.getClass().getName(); + } + + /** + * Broadcast a SET operation + */ + public <I> void broadcastSet(I object, ModelProperty<? super I> property, Object oldValue, Object newValue) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.SET) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .oldValue(valueSerializer.serialize(oldValue)) + .newValue(valueSerializer.serialize(newValue)) + .valueType(property.getType().getName()) + .build(); + + // Check if CREATE has been sent for this object - if not, buffer the operation + if (!createdObjects.containsKey(objectId)) { + // Buffer the operation to be sent after CREATE + pendingOperations.computeIfAbsent(objectId, k -> new ArrayList<>()).add(operation); + logger.fine("Buffered SET operation for object not yet created: " + objectId); + } else { + syncManager.publishOperation(operation); + } + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast SET operation", e); + } + } + + /** + * Broadcast an ADD operation + */ + public <I> void broadcastAdd(I object, ModelProperty<? super I> property, Object addedValue, int index) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + // For PAMELA objects, use reference serialization + String serializedValue; + if (addedValue != null && modelFactory != null && modelFactory.isProxyObject(addedValue)) { + // Ensure added object is registered and use reference + identityManager.getOrCreateObjectId(addedValue); + serializedValue = valueSerializer.serializeReference(addedValue, identityManager); + } else { + serializedValue = valueSerializer.serialize(addedValue); + } + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.ADD) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .newValue(serializedValue) + .valueType(property.getType().getName()) + .index(index) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast ADD operation", e); + } + } + + /** + * Broadcast a REMOVE operation + */ + public <I> void broadcastRemove(I object, ModelProperty<? super I> property, Object removedValue) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + String entityType = getEntityTypeName(object); + + // For PAMELA objects, use reference serialization + String serializedValue; + if (removedValue != null && modelFactory != null && modelFactory.isProxyObject(removedValue)) { + serializedValue = valueSerializer.serializeReference(removedValue, identityManager); + } else { + serializedValue = valueSerializer.serialize(removedValue); + } + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.REMOVE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(property.getPropertyIdentifier()) + .oldValue(serializedValue) + .valueType(property.getType().getName()) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast REMOVE operation", e); + } + } + + /** + * Broadcast a CREATE operation + */ + public <I> void broadcastCreate(I object, String entityType) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getOrCreateObjectId(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.CREATE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .build(); + + // Send CREATE first + syncManager.publishOperation(operation); + + // Mark object as created + createdObjects.put(objectId, Boolean.TRUE); + + // Then send any buffered operations for this object + List<SyncOperation> buffered = pendingOperations.remove(objectId); + if (buffered != null) { + for (SyncOperation bufferedOp : buffered) { + syncManager.publishOperation(bufferedOp); + } + logger.fine("Sent " + buffered.size() + " buffered operations for: " + objectId); + } + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast CREATE operation", e); + } + } + + /** + * Broadcast a DELETE operation + */ + public <I> void broadcastDelete(I object) { + if (syncManager == null || isApplyingRemoteOperation() || !syncManager.isConnected()) { + return; + } + + try { + String objectId = identityManager.getObjectId(object); + if (objectId == null) { + logger.warning("Cannot broadcast delete for unregistered object"); + return; + } + + String entityType = getEntityTypeName(object); + + SyncOperation operation = new SyncOperation.Builder(SyncOperation.OperationType.DELETE) + .replicaId(syncManager.getReplicaId()) + .objectId(objectId) + .entityType(entityType) + .build(); + + syncManager.publishOperation(operation); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to broadcast DELETE operation", e); + } + } + + // SyncOperationListener implementation + + @Override + public void onOperationReceived(SyncOperation operation) { + logger.info(">>> Received operation: " + operation.getOperationType() + + " objectId=" + operation.getObjectId() + + " property=" + operation.getPropertyIdentifier()); + + if (modelFactory == null) { + logger.warning("ModelFactory not set, cannot apply remote operation"); + return; + } + + applyingRemoteOperation.set(true); + try { + switch (operation.getOperationType()) { + case SET: + applyRemoteSet(operation); + break; + case ADD: + applyRemoteAdd(operation); + break; + case REMOVE: + applyRemoteRemove(operation); + break; + case CREATE: + applyRemoteCreate(operation); + break; + case DELETE: + applyRemoteDelete(operation); + break; + default: + logger.warning("Unknown operation type: " + operation.getOperationType()); + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote operation: " + operation, e); + } finally { + applyingRemoteOperation.set(false); + } + } + + @Override + public void onConnected() { + logger.info("Sync connected as replica: " + syncManager.getReplicaId()); + + // Automatically request state from other replicas if enabled + if (autoRequestStateOnConnect && !stateReceived) { + logger.info("Automatically requesting state from other replicas..."); + requestStateSync(); + } + } + + @Override + public void onDisconnected(String reason) { + logger.info("Sync disconnected: " + reason); + } + + @Override + public void onError(Throwable error) { + logger.log(Level.SEVERE, "Sync error", error); + } + + @Override + public void onStateRequested(String requestingReplicaId) { + logger.info("State requested by replica: " + requestingReplicaId); + if (syncManager == null) { + return; + } + + try { + String stateSnapshot = serializeCurrentState(); + syncManager.sendStateResponse(stateSnapshot, requestingReplicaId); + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to send state response", e); + } + } + + @Override + public void onStateReceived(String stateSnapshot, String fromReplicaId) { + logger.info("State received from replica: " + fromReplicaId); + + // Mark state as received to prevent duplicate requests + stateReceived = true; + + try { + restoreFromSnapshot(stateSnapshot); + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to restore from snapshot", e); + } + } + + /** + * Enable or disable automatic state request on connection. + * When enabled, the context will automatically request state from other replicas + * upon connecting to the sync manager. + * + * @param autoRequest true to enable automatic state request + */ + public void setAutoRequestStateOnConnect(boolean autoRequest) { + this.autoRequestStateOnConnect = autoRequest; + } + + /** + * Check if automatic state request on connect is enabled. + * + * @return true if enabled + */ + public boolean isAutoRequestStateOnConnect() { + return autoRequestStateOnConnect; + } + + /** + * Check if state has been received from another replica. + * + * @return true if state was received + */ + public boolean isStateReceived() { + return stateReceived; + } + + /** + * Request state from other replicas. + * Call this when a new client joins to get the current state. + */ + public void requestStateSync() { + if (syncManager != null && syncManager.isConnected()) { + syncManager.requestState(); + } + } + + /** + * Serialize the current state of all tracked objects into a snapshot. + * + * @return JSON string containing all objects and their properties + */ + public String serializeCurrentState() { + StringBuilder json = new StringBuilder(); + json.append("{\"objects\":["); + + Map<String, Object> allObjects = identityManager.getAllObjects(); + boolean first = true; + + for (Map.Entry<String, Object> entry : allObjects.entrySet()) { + String objectId = entry.getKey(); + Object object = entry.getValue(); + + if (!first) { + json.append(","); + } + first = false; + + json.append("{"); + json.append("\"id\":\"").append(escapeJson(objectId)).append("\","); + json.append("\"type\":\"").append(escapeJson(getEntityTypeName(object))).append("\","); + json.append("\"properties\":{"); + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + boolean firstProp = true; + java.util.Iterator<? extends ModelProperty<?>> propIterator = handler.getModelEntity().getProperties(); + while (propIterator.hasNext()) { + ModelProperty<?> property = propIterator.next(); + if (property.getGetter() != null) { + Object value = handler.invokeGetter(property.getPropertyIdentifier()); + if (value != null) { + if (!firstProp) { + json.append(","); + } + firstProp = false; + + String serializedValue; + if (modelFactory.isProxyObject(value)) { + serializedValue = valueSerializer.serializeReference(value, identityManager); + } else if (value instanceof List) { + serializedValue = serializeList((List<?>) value); + } else { + serializedValue = valueSerializer.serialize(value); + } + + json.append("\"").append(escapeJson(property.getPropertyIdentifier())).append("\":"); + json.append("\"").append(escapeJson(serializedValue)).append("\""); + } + } + } + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to serialize object: " + objectId, e); + } + + json.append("}}"); + } + + json.append("]}"); + return json.toString(); + } + + /** + * Restore the local state from a snapshot received from another replica. + * + * @param stateSnapshot JSON string containing the state snapshot + */ + public void restoreFromSnapshot(String stateSnapshot) { + if (stateSnapshot == null || stateSnapshot.isEmpty()) { + logger.warning("Empty state snapshot received"); + return; + } + + applyingRemoteOperation.set(true); + try { + // Simple JSON parsing for the snapshot format + // Format: {"objects":[{"id":"...","type":"...","properties":{...}}, ...]} + + int objectsStart = stateSnapshot.indexOf("["); + int objectsEnd = stateSnapshot.lastIndexOf("]"); + if (objectsStart < 0 || objectsEnd < 0) { + logger.warning("Invalid snapshot format"); + return; + } + + String objectsJson = stateSnapshot.substring(objectsStart + 1, objectsEnd); + if (objectsJson.trim().isEmpty()) { + logger.info("Empty state snapshot - no objects to restore"); + return; + } + + // Parse each object + List<ObjectSnapshot> snapshots = parseObjectSnapshots(objectsJson); + + // First pass: create all objects + for (ObjectSnapshot snapshot : snapshots) { + if (!identityManager.hasObject(snapshot.id)) { + try { + Class<?> entityClass = Class.forName(snapshot.type); + Object newObject = modelFactory._newInstance(entityClass, false); + + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + identityManager.registerObject(newObject, snapshot.id); + createdObjects.put(snapshot.id, Boolean.TRUE); + logger.fine("Created object from snapshot: " + snapshot.id); + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to create object from snapshot: " + snapshot.id, e); + } + } + } + + // Second pass: set properties (after all objects exist for reference resolution) + for (ObjectSnapshot snapshot : snapshots) { + Object object = identityManager.getObject(snapshot.id); + if (object == null) { + continue; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(object); + if (handler != null) { + for (Map.Entry<String, String> prop : snapshot.properties.entrySet()) { + try { + ModelProperty<?> modelProperty = handler.getModelEntity().getModelProperty(prop.getKey()); + if (modelProperty != null) { + String serializedValue = prop.getValue(); + + // Handle list properties specially + if (serializedValue.startsWith("[") && serializedValue.endsWith("]")) { + // It's a list - use adder for each element + restoreListProperty(handler, modelProperty, serializedValue); + } else { + Object value = valueSerializer.deserialize(serializedValue, modelProperty.getType(), this); + handler.invokeSetter(prop.getKey(), value); + } + } + } catch (Exception e) { + logger.log(Level.FINE, "Failed to set property: " + prop.getKey(), e); + } + } + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to restore object properties: " + snapshot.id, e); + } + } + + logger.info("Restored " + snapshots.size() + " objects from snapshot"); + + } finally { + applyingRemoteOperation.set(false); + } + } + + /** + * Restore a list property from serialized format using adder method. + */ + private void restoreListProperty(ProxyMethodHandler<?> handler, ModelProperty<?> property, String serializedList) { + // Remove brackets: [item1,item2,item3] -> item1,item2,item3 + String content = serializedList.substring(1, serializedList.length() - 1); + if (content.trim().isEmpty()) { + return; // Empty list + } + + // Split by comma (careful with nested structures) + List<String> items = splitListItems(content); + + for (String item : items) { + item = item.trim(); + if (item.isEmpty()) { + continue; + } + + try { + // Deserialize the item + Object value = valueSerializer.deserialize(item, property.getType(), this); + if (value != null) { + // Use adder to add to the list + handler.invokeAdder(property.getPropertyIdentifier(), value); + logger.fine("Added item to list property " + property.getPropertyIdentifier() + ": " + value); + } + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to add item to list: " + item, e); + } + } + } + + /** + * Split list items by comma, handling nested structures. + */ + private List<String> splitListItems(String content) { + List<String> items = new ArrayList<>(); + int depth = 0; + StringBuilder current = new StringBuilder(); + + for (int i = 0; i < content.length(); i++) { + char c = content.charAt(i); + if (c == '[' || c == '{') { + depth++; + current.append(c); + } else if (c == ']' || c == '}') { + depth--; + current.append(c); + } else if (c == ',' && depth == 0) { + items.add(current.toString()); + current = new StringBuilder(); + } else { + current.append(c); + } + } + + if (current.length() > 0) { + items.add(current.toString()); + } + + return items; + } + + private String serializeList(List<?> list) { + StringBuilder sb = new StringBuilder("["); + boolean first = true; + for (Object item : list) { + if (!first) { + sb.append(","); + } + first = false; + + if (item != null && modelFactory != null && modelFactory.isProxyObject(item)) { + sb.append(valueSerializer.serializeReference(item, identityManager)); + } else { + sb.append(valueSerializer.serialize(item)); + } + } + sb.append("]"); + return sb.toString(); + } + + private String escapeJson(String value) { + if (value == null) return ""; + return value.replace("\\", "\\\\") + .replace("\"", "\\\"") + .replace("\n", "\\n") + .replace("\r", "\\r") + .replace("\t", "\\t"); + } + + private static class ObjectSnapshot { + String id; + String type; + Map<String, String> properties = new java.util.HashMap<>(); + } + + private List<ObjectSnapshot> parseObjectSnapshots(String objectsJson) { + List<ObjectSnapshot> snapshots = new ArrayList<>(); + + // Simple parsing - find each object block + int depth = 0; + int objectStart = -1; + + for (int i = 0; i < objectsJson.length(); i++) { + char c = objectsJson.charAt(i); + if (c == '{') { + if (depth == 0) { + objectStart = i; + } + depth++; + } else if (c == '}') { + depth--; + if (depth == 0 && objectStart >= 0) { + String objectJson = objectsJson.substring(objectStart, i + 1); + ObjectSnapshot snapshot = parseObjectSnapshot(objectJson); + if (snapshot != null) { + snapshots.add(snapshot); + } + objectStart = -1; + } + } + } + + return snapshots; + } + + private ObjectSnapshot parseObjectSnapshot(String objectJson) { + ObjectSnapshot snapshot = new ObjectSnapshot(); + + // Extract id + snapshot.id = extractJsonValue(objectJson, "id"); + snapshot.type = extractJsonValue(objectJson, "type"); + + if (snapshot.id == null || snapshot.type == null) { + return null; + } + + // Extract properties block + int propsStart = objectJson.indexOf("\"properties\":{"); + if (propsStart >= 0) { + propsStart += 14; // length of "properties":{ + int propsEnd = findMatchingBrace(objectJson, propsStart - 1); + if (propsEnd > propsStart) { + String propsJson = objectJson.substring(propsStart, propsEnd); + parseProperties(propsJson, snapshot.properties); + } + } + + return snapshot; + } + + private String extractJsonValue(String json, String key) { + String pattern = "\"" + key + "\":\""; + int start = json.indexOf(pattern); + if (start < 0) return null; + start += pattern.length(); + + int end = start; + while (end < json.length()) { + char c = json.charAt(end); + if (c == '"' && json.charAt(end - 1) != '\\') { + break; + } + end++; + } + + if (end > start) { + return unescapeJson(json.substring(start, end)); + } + return null; + } + + private int findMatchingBrace(String json, int openPos) { + int depth = 0; + for (int i = openPos; i < json.length(); i++) { + char c = json.charAt(i); + if (c == '{') depth++; + else if (c == '}') { + depth--; + if (depth == 0) return i; + } + } + return -1; + } + + private void parseProperties(String propsJson, Map<String, String> properties) { + // Simple key-value parsing for "key":"value" pairs + int i = 0; + while (i < propsJson.length()) { + // Find key start + int keyStart = propsJson.indexOf('"', i); + if (keyStart < 0) break; + keyStart++; + + int keyEnd = propsJson.indexOf('"', keyStart); + if (keyEnd < 0) break; + + String key = propsJson.substring(keyStart, keyEnd); + + // Find value after ":" + int colonPos = propsJson.indexOf(':', keyEnd); + if (colonPos < 0) break; + + int valueStart = propsJson.indexOf('"', colonPos); + if (valueStart < 0) break; + valueStart++; + + int valueEnd = valueStart; + while (valueEnd < propsJson.length()) { + char c = propsJson.charAt(valueEnd); + if (c == '"' && propsJson.charAt(valueEnd - 1) != '\\') { + break; + } + valueEnd++; + } + + if (valueEnd > valueStart) { + properties.put(key, unescapeJson(propsJson.substring(valueStart, valueEnd))); + } + + i = valueEnd + 1; + } + } + + private String unescapeJson(String value) { + return value.replace("\\\"", "\"") + .replace("\\\\", "\\") + .replace("\\n", "\n") + .replace("\\r", "\r") + .replace("\\t", "\t"); + } + + // Private methods for applying remote operations + + private void applyRemoteSet(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + // Object doesn't exist yet - try to create it first + // This can happen if SET arrives before CREATE due to message ordering + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); + if (target == null) { + logger.warning("Target object not found for SET: " + operation.getObjectId()); + return; + } + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object newValue = valueSerializer.deserialize( + operation.getNewValueSerialized(), + property.getType(), + this + ); + handler.invokeSetter(operation.getPropertyIdentifier(), newValue); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote SET", e); + } + } + + private void applyRemoteAdd(SyncOperation operation) { + logger.info("Applying remote ADD: objectId=" + operation.getObjectId() + + " property=" + operation.getPropertyIdentifier() + + " value=" + operation.getNewValueSerialized()); + + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + // Object doesn't exist yet - try to create it first + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); + if (target == null) { + logger.warning("Target object not found for ADD: " + operation.getObjectId()); + return; + } + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object value = valueSerializer.deserialize( + operation.getNewValueSerialized(), + property.getType(), + this + ); + logger.info("Deserialized value for ADD: " + value + " (type=" + (value != null ? value.getClass().getName() : "null") + ")"); + // Use property identifier string + handler.invokeAdder(operation.getPropertyIdentifier(), value); + logger.info("Successfully added to collection"); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote ADD", e); + } + } + + private void applyRemoteRemove(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + logger.warning("Target object not found for REMOVE: " + operation.getObjectId()); + return; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); + if (property != null) { + Object value = valueSerializer.deserialize( + operation.getOldValueSerialized(), + property.getType(), + this + ); + handler.invokeRemover(operation.getPropertyIdentifier(), value); + } + } + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote REMOVE", e); + } + } + + private void applyRemoteCreate(SyncOperation operation) { + // Check if object already exists + if (identityManager.hasObject(operation.getObjectId())) { + logger.fine("Object already exists: " + operation.getObjectId()); + return; + } + + try { + // Load the entity class + Class<?> entityClass = Class.forName(operation.getEntityType()); + + // Create a new instance using _newInstance (like deserialization does) + // This creates the object without requiring the initializer + Object newObject = modelFactory._newInstance(entityClass, false); + + // Mark the object as deserializing so it can receive property updates + // without failing the "uninitialized" check + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + // Register with the specified ID + identityManager.registerObject(newObject, operation.getObjectId()); + + // Mark as known so SET operations work properly + createdObjects.put(operation.getObjectId(), Boolean.TRUE); + + logger.fine("Created remote object: " + operation.getObjectId()); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote CREATE", e); + } + } + + private void applyRemoteDelete(SyncOperation operation) { + Object target = identityManager.getObject(operation.getObjectId()); + if (target == null) { + logger.fine("Object already deleted or not found: " + operation.getObjectId()); + return; + } + + try { + ProxyMethodHandler<?> handler = modelFactory.getHandler(target); + if (handler != null) { + handler.invokeDeleter(target); + } + + identityManager.unregisterById(operation.getObjectId()); + + } catch (Exception e) { + logger.log(Level.SEVERE, "Failed to apply remote DELETE", e); + } + } + + /** + * Ensure a remote object exists, creating it if necessary. + * This handles the case where operations arrive out of order. + * + * @param objectId the object ID + * @param entityType the entity class name + * @return the object, or null if creation failed + */ + private Object ensureRemoteObjectExists(String objectId, String entityType) { + // Check again if it exists now + Object existing = identityManager.getObject(objectId); + if (existing != null) { + return existing; + } + + if (entityType == null) { + logger.warning("Cannot create object without entityType for ID: " + objectId); + return null; + } + + try { + Class<?> entityClass = Class.forName(entityType); + + // Create using _newInstance (bypasses initializer requirement) + Object newObject = modelFactory._newInstance(entityClass, false); + + // Mark as deserializing to allow setters without initialization + ProxyMethodHandler<?> handler = modelFactory.getHandler(newObject); + if (handler != null) { + handler.setDeserializing(true); + } + + // Register with the specified ID + identityManager.registerObject(newObject, objectId); + + // Mark as known so SET operations work properly + createdObjects.put(objectId, Boolean.TRUE); + + logger.fine("Auto-created remote object: " + objectId); + return newObject; + + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to auto-create remote object: " + objectId, e); + return null; + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java new file mode 100644 index 00000000..745a4e3a --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncManager.java @@ -0,0 +1,80 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.sync; + +/** + * Interface for synchronization managers that handle the transport layer + * for PAMELA collaborative synchronization. + * + * Implementations can use different messaging systems like RabbitMQ, Redis, + * WebSockets, or any other pub/sub mechanism. + * + * @author PAMELA Sync + */ +public interface SyncManager { + + /** + * Publishes a synchronization operation to all other replicas. + * + * @param operation the operation to publish + */ + void publishOperation(SyncOperation operation); + + /** + * Adds a listener to receive operations from other replicas. + * + * @param listener the listener to add + */ + void addListener(SyncOperationListener listener); + + /** + * Removes a previously registered listener. + * + * @param listener the listener to remove + */ + void removeListener(SyncOperationListener listener); + + /** + * Returns whether this sync manager is currently connected to the messaging system. + * + * @return true if connected, false otherwise + */ + boolean isConnected(); + + /** + * Returns the unique identifier of this replica. + * + * @return the replica ID + */ + String getReplicaId(); + + /** + * Requests the current state from other replicas. + * Used when a new client joins and needs to synchronize. + */ + default void requestState() { + // Default implementation does nothing + } + + /** + * Sends the current state as a response to a state request. + * + * @param stateSnapshot the serialized state snapshot + * @param targetReplicaId the replica that requested the state (optional, null for broadcast) + */ + default void sendStateResponse(String stateSnapshot, String targetReplicaId) { + // Default implementation does nothing + } + +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java new file mode 100644 index 00000000..accb3e31 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperation.java @@ -0,0 +1,230 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.io.Serializable; +import java.util.UUID; + +/** + * Represents a synchronization operation that can be shared between PAMELA instances + * via RabbitMQ for collaborative real-time editing. + * + * @author PAMELA Team + */ +public class SyncOperation implements Serializable { + + private static final long serialVersionUID = 1L; + + /** + * Types of operations that can be synchronized + */ + public enum OperationType { + CREATE, + DELETE, + SET, + ADD, + REMOVE, + REINDEX, + STATE_REQUEST, + STATE_RESPONSE + } + + // Operation identification + private final String operationId; + private final OperationType operationType; + private final long timestamp; + private final String replicaId; + + // Target object information + private final String objectId; + private final String entityType; + + // Property information (for SET, ADD, REMOVE, REINDEX) + private final String propertyIdentifier; + + // Value information + private final String oldValueSerialized; + private final String newValueSerialized; + private final String valueType; + + // For list operations + private final int index; + + // Vector clock for causality tracking + private final VectorClock vectorClock; + + private SyncOperation(Builder builder) { + this.operationId = builder.operationId != null ? builder.operationId : UUID.randomUUID().toString(); + this.operationType = builder.operationType; + this.timestamp = builder.timestamp > 0 ? builder.timestamp : System.currentTimeMillis(); + this.replicaId = builder.replicaId; + this.objectId = builder.objectId; + this.entityType = builder.entityType; + this.propertyIdentifier = builder.propertyIdentifier; + this.oldValueSerialized = builder.oldValueSerialized; + this.newValueSerialized = builder.newValueSerialized; + this.valueType = builder.valueType; + this.index = builder.index; + this.vectorClock = builder.vectorClock; + } + + // Getters + public String getOperationId() { + return operationId; + } + + public OperationType getOperationType() { + return operationType; + } + + public long getTimestamp() { + return timestamp; + } + + public String getReplicaId() { + return replicaId; + } + + public String getObjectId() { + return objectId; + } + + public String getEntityType() { + return entityType; + } + + public String getPropertyIdentifier() { + return propertyIdentifier; + } + + public String getOldValueSerialized() { + return oldValueSerialized; + } + + public String getNewValueSerialized() { + return newValueSerialized; + } + + public String getValueType() { + return valueType; + } + + public int getIndex() { + return index; + } + + public VectorClock getVectorClock() { + return vectorClock; + } + + @Override + public String toString() { + return "SyncOperation{" + + "type=" + operationType + + ", objectId='" + objectId + '\'' + + ", property='" + propertyIdentifier + '\'' + + ", replica='" + replicaId + '\'' + + '}'; + } + + /** + * Builder for creating SyncOperation instances + */ + public static class Builder { + private String operationId; + private OperationType operationType; + private long timestamp; + private String replicaId; + private String objectId; + private String entityType; + private String propertyIdentifier; + private String oldValueSerialized; + private String newValueSerialized; + private String valueType; + private int index = -1; + private VectorClock vectorClock; + + public Builder(OperationType operationType) { + this.operationType = operationType; + } + + public Builder operationId(String operationId) { + this.operationId = operationId; + return this; + } + + public Builder timestamp(long timestamp) { + this.timestamp = timestamp; + return this; + } + + public Builder replicaId(String replicaId) { + this.replicaId = replicaId; + return this; + } + + public Builder objectId(String objectId) { + this.objectId = objectId; + return this; + } + + public Builder entityType(String entityType) { + this.entityType = entityType; + return this; + } + + public Builder propertyIdentifier(String propertyIdentifier) { + this.propertyIdentifier = propertyIdentifier; + return this; + } + + public Builder oldValue(String oldValueSerialized) { + this.oldValueSerialized = oldValueSerialized; + return this; + } + + public Builder newValue(String newValueSerialized) { + this.newValueSerialized = newValueSerialized; + return this; + } + + public Builder valueType(String valueType) { + this.valueType = valueType; + return this; + } + + public Builder index(int index) { + this.index = index; + return this; + } + + public Builder vectorClock(VectorClock vectorClock) { + this.vectorClock = vectorClock; + return this; + } + + public SyncOperation build() { + if (operationType == null) { + throw new IllegalStateException("Operation type is required"); + } + if (replicaId == null) { + throw new IllegalStateException("Replica ID is required"); + } + if (objectId == null) { + throw new IllegalStateException("Object ID is required"); + } + return new SyncOperation(this); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java new file mode 100644 index 00000000..7db324e7 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationListener.java @@ -0,0 +1,71 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +/** + * Listener interface for receiving synchronization operations from remote replicas. + * Implementations handle the application of remote operations to the local model. + * + * @author PAMELA Team + */ +public interface SyncOperationListener { + + /** + * Called when a synchronization operation is received from a remote replica + * + * @param operation the received operation + */ + void onOperationReceived(SyncOperation operation); + + /** + * Called when the synchronization connection is established + */ + default void onConnected() { + } + + /** + * Called when the synchronization connection is lost + * + * @param reason the reason for disconnection + */ + default void onDisconnected(String reason) { + } + + /** + * Called when a synchronization error occurs + * + * @param error the error that occurred + */ + default void onError(Throwable error) { + } + + /** + * Called when a state request is received from a new replica. + * The listener should respond by sending the current state. + * + * @param requestingReplicaId the ID of the replica requesting state + */ + default void onStateRequested(String requestingReplicaId) { + } + + /** + * Called when a state snapshot is received from another replica. + * The listener should restore the local state from the snapshot. + * + * @param stateSnapshot the serialized state snapshot + * @param fromReplicaId the ID of the replica that sent the state + */ + default void onStateReceived(String stateSnapshot, String fromReplicaId) { + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java new file mode 100644 index 00000000..c1ac7a84 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncOperationSerializer.java @@ -0,0 +1,176 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import com.fasterxml.jackson.core.JsonProcessingException; +import com.fasterxml.jackson.databind.ObjectMapper; + +/** + * Serializer for SyncOperation objects. + * Handles conversion to/from JSON for transmission over RabbitMQ. + * + * @author PAMELA Team + */ +public class SyncOperationSerializer { + + private static final ObjectMapper objectMapper = new ObjectMapper(); + + /** + * Serialize a SyncOperation to JSON string + * + * @param operation the operation to serialize + * @return JSON string representation + * @throws SyncSerializationException if serialization fails + */ + public static String serialize(SyncOperation operation) throws SyncSerializationException { + try { + return objectMapper.writeValueAsString(new SyncOperationDTO(operation)); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to serialize SyncOperation", e); + } + } + + /** + * Deserialize a JSON string to SyncOperation + * + * @param json the JSON string + * @return the deserialized SyncOperation + * @throws SyncSerializationException if deserialization fails + */ + public static SyncOperation deserialize(String json) throws SyncSerializationException { + try { + SyncOperationDTO dto = objectMapper.readValue(json, SyncOperationDTO.class); + return dto.toSyncOperation(); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to deserialize SyncOperation", e); + } + } + + /** + * Serialize a SyncOperation to byte array + * + * @param operation the operation to serialize + * @return byte array representation + * @throws SyncSerializationException if serialization fails + */ + public static byte[] serializeToBytes(SyncOperation operation) throws SyncSerializationException { + try { + return objectMapper.writeValueAsBytes(new SyncOperationDTO(operation)); + } catch (JsonProcessingException e) { + throw new SyncSerializationException("Failed to serialize SyncOperation to bytes", e); + } + } + + /** + * Deserialize a byte array to SyncOperation + * + * @param bytes the byte array + * @return the deserialized SyncOperation + * @throws SyncSerializationException if deserialization fails + */ + public static SyncOperation deserializeFromBytes(byte[] bytes) throws SyncSerializationException { + try { + SyncOperationDTO dto = objectMapper.readValue(bytes, SyncOperationDTO.class); + return dto.toSyncOperation(); + } catch (Exception e) { + throw new SyncSerializationException("Failed to deserialize SyncOperation from bytes", e); + } + } + + /** + * DTO class for JSON serialization + */ + public static class SyncOperationDTO { + public String operationId; + public String operationType; + public long timestamp; + public String replicaId; + public String objectId; + public String entityType; + public String propertyIdentifier; + public String oldValueSerialized; + public String newValueSerialized; + public String valueType; + public int index; + public VectorClockDTO vectorClock; + + public SyncOperationDTO() { + } + + public SyncOperationDTO(SyncOperation op) { + this.operationId = op.getOperationId(); + this.operationType = op.getOperationType().name(); + this.timestamp = op.getTimestamp(); + this.replicaId = op.getReplicaId(); + this.objectId = op.getObjectId(); + this.entityType = op.getEntityType(); + this.propertyIdentifier = op.getPropertyIdentifier(); + this.oldValueSerialized = op.getOldValueSerialized(); + this.newValueSerialized = op.getNewValueSerialized(); + this.valueType = op.getValueType(); + this.index = op.getIndex(); + if (op.getVectorClock() != null) { + this.vectorClock = new VectorClockDTO(op.getVectorClock()); + } + } + + public SyncOperation toSyncOperation() { + VectorClock vc = null; + if (vectorClock != null) { + vc = vectorClock.toVectorClock(); + } + + return new SyncOperation.Builder(SyncOperation.OperationType.valueOf(operationType)) + .operationId(operationId) + .timestamp(timestamp) + .replicaId(replicaId) + .objectId(objectId) + .entityType(entityType) + .propertyIdentifier(propertyIdentifier) + .oldValue(oldValueSerialized) + .newValue(newValueSerialized) + .valueType(valueType) + .index(index) + .vectorClock(vc) + .build(); + } + } + + /** + * DTO class for VectorClock JSON serialization + */ + public static class VectorClockDTO { + public java.util.Map<String, Long> clock; + + public VectorClockDTO() { + } + + public VectorClockDTO(VectorClock vc) { + this.clock = vc.getClockMap(); + } + + public VectorClock toVectorClock() { + return new VectorClock(clock != null ? clock : new java.util.HashMap<>()); + } + } + + /** + * Exception for serialization errors + */ + public static class SyncSerializationException extends Exception { + public SyncSerializationException(String message, Throwable cause) { + super(message, cause); + } + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java new file mode 100644 index 00000000..48c35380 --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncValueSerializer.java @@ -0,0 +1,182 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.util.logging.Level; +import java.util.logging.Logger; + +/** + * Serializer for property values in sync operations. + * Handles conversion of PAMELA property values to/from string representation + * for transmission over RabbitMQ. + * + * @author PAMELA Team + */ +public class SyncValueSerializer { + + private static final Logger logger = Logger.getLogger(SyncValueSerializer.class.getName()); + + // Special markers for null and object references + private static final String NULL_MARKER = "__NULL__"; + private static final String OBJECT_REF_PREFIX = "__REF__:"; + + /** + * Serialize a value to string representation + * + * @param value the value to serialize + * @return string representation + */ + public String serialize(Object value) { + if (value == null) { + return NULL_MARKER; + } + + // Handle primitive types and common types + if (value instanceof String) { + return (String) value; + } + + if (value instanceof Number || value instanceof Boolean) { + return value.toString(); + } + + if (value instanceof Enum) { + return ((Enum<?>) value).name(); + } + + // Handle PAMELA objects by reference + // This requires the object to be registered in the identity manager + // For now, we'll use toString() and hope for the best + // A more robust solution would check if it's a proxy object + + return value.toString(); + } + + /** + * Serialize a PAMELA object reference + * + * @param object the PAMELA object + * @param identityManager the identity manager to get the object ID + * @return reference string + */ + public String serializeReference(Object object, ObjectIdentityManager identityManager) { + if (object == null) { + return NULL_MARKER; + } + + String objectId = identityManager.getObjectId(object); + if (objectId != null) { + return OBJECT_REF_PREFIX + objectId; + } + + // Not a registered object, serialize as string + return serialize(object); + } + + /** + * Deserialize a string representation to a value + * + * @param serialized the serialized string + * @param targetType the expected type + * @param syncContext the sync context for resolving object references + * @return the deserialized value + */ + public Object deserialize(String serialized, Class<?> targetType, SyncEditingContext syncContext) { + if (serialized == null || NULL_MARKER.equals(serialized)) { + return null; + } + + // Handle object references + if (serialized.startsWith(OBJECT_REF_PREFIX)) { + String objectId = serialized.substring(OBJECT_REF_PREFIX.length()); + return syncContext.getIdentityManager().getObject(objectId); + } + + try { + // Handle primitive types + if (targetType == String.class) { + return serialized; + } + + if (targetType == int.class || targetType == Integer.class) { + return Integer.parseInt(serialized); + } + + if (targetType == long.class || targetType == Long.class) { + return Long.parseLong(serialized); + } + + if (targetType == double.class || targetType == Double.class) { + return Double.parseDouble(serialized); + } + + if (targetType == float.class || targetType == Float.class) { + return Float.parseFloat(serialized); + } + + if (targetType == boolean.class || targetType == Boolean.class) { + return Boolean.parseBoolean(serialized); + } + + if (targetType == byte.class || targetType == Byte.class) { + return Byte.parseByte(serialized); + } + + if (targetType == short.class || targetType == Short.class) { + return Short.parseShort(serialized); + } + + if (targetType == char.class || targetType == Character.class) { + return serialized.isEmpty() ? '\0' : serialized.charAt(0); + } + + // Handle enums + if (targetType.isEnum()) { + @SuppressWarnings({"unchecked", "rawtypes"}) + Object enumValue = Enum.valueOf((Class<Enum>) targetType, serialized); + return enumValue; + } + + // For other types, return the string and let PAMELA's converters handle it + return serialized; + + } catch (Exception e) { + logger.log(Level.WARNING, "Failed to deserialize value: " + serialized + " to type " + targetType, e); + return serialized; + } + } + + /** + * Check if a serialized value is an object reference + * + * @param serialized the serialized string + * @return true if it's an object reference + */ + public boolean isObjectReference(String serialized) { + return serialized != null && serialized.startsWith(OBJECT_REF_PREFIX); + } + + /** + * Extract the object ID from a reference string + * + * @param serialized the serialized reference + * @return the object ID, or null if not a reference + */ + public String extractObjectId(String serialized) { + if (isObjectReference(serialized)) { + return serialized.substring(OBJECT_REF_PREFIX.length()); + } + return null; + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java new file mode 100644 index 00000000..18f5bfac --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/VectorClock.java @@ -0,0 +1,178 @@ +/** + * Copyright (c) 2024, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html. + */ + +package org.openflexo.pamela.sync; + +import java.io.Serializable; +import java.util.HashMap; +import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; + +/** + * Vector Clock implementation for tracking causality in distributed PAMELA instances. + * Used to establish happened-before relationships between operations from different replicas. + * + * @author PAMELA Team + */ +public class VectorClock implements Serializable, Comparable<VectorClock> { + + private static final long serialVersionUID = 1L; + + private final Map<String, Long> clock; + + public VectorClock() { + this.clock = new ConcurrentHashMap<>(); + } + + public VectorClock(Map<String, Long> initialClock) { + this.clock = new ConcurrentHashMap<>(initialClock); + } + + /** + * Copy constructor + */ + public VectorClock(VectorClock other) { + this.clock = new ConcurrentHashMap<>(other.clock); + } + + /** + * Increment the clock for a specific replica + * + * @param replicaId the replica identifier + * @return the new clock value for this replica + */ + public synchronized long increment(String replicaId) { + long newValue = clock.getOrDefault(replicaId, 0L) + 1; + clock.put(replicaId, newValue); + return newValue; + } + + /** + * Get the clock value for a specific replica + * + * @param replicaId the replica identifier + * @return the clock value, or 0 if not set + */ + public long get(String replicaId) { + return clock.getOrDefault(replicaId, 0L); + } + + /** + * Set the clock value for a specific replica + * + * @param replicaId the replica identifier + * @param value the clock value + */ + public synchronized void set(String replicaId, long value) { + clock.put(replicaId, value); + } + + /** + * Merge this vector clock with another one, taking the maximum of each component + * + * @param other the other vector clock to merge with + */ + public synchronized void merge(VectorClock other) { + for (Map.Entry<String, Long> entry : other.clock.entrySet()) { + clock.merge(entry.getKey(), entry.getValue(), Math::max); + } + } + + /** + * Check if this vector clock happened before another one + * + * @param other the other vector clock + * @return true if this clock happened before the other + */ + public boolean happenedBefore(VectorClock other) { + boolean atLeastOneLess = false; + + for (String replicaId : clock.keySet()) { + long thisValue = this.get(replicaId); + long otherValue = other.get(replicaId); + + if (thisValue > otherValue) { + return false; + } + if (thisValue < otherValue) { + atLeastOneLess = true; + } + } + + // Check for replicas in other but not in this + for (String replicaId : other.clock.keySet()) { + if (!clock.containsKey(replicaId) && other.get(replicaId) > 0) { + atLeastOneLess = true; + } + } + + return atLeastOneLess; + } + + /** + * Check if this vector clock is concurrent with another one + * (neither happened before the other) + * + * @param other the other vector clock + * @return true if the clocks are concurrent + */ + public boolean isConcurrent(VectorClock other) { + return !this.happenedBefore(other) && !other.happenedBefore(this) && !this.equals(other); + } + + /** + * Create a copy of this vector clock + * + * @return a new VectorClock with the same values + */ + public VectorClock copy() { + return new VectorClock(this); + } + + /** + * Get all clock entries + * + * @return a copy of the internal clock map + */ + public Map<String, Long> getClockMap() { + return new HashMap<>(clock); + } + + @Override + public int compareTo(VectorClock other) { + if (this.happenedBefore(other)) { + return -1; + } else if (other.happenedBefore(this)) { + return 1; + } + return 0; // Concurrent or equal + } + + @Override + public boolean equals(Object obj) { + if (this == obj) return true; + if (obj == null || getClass() != obj.getClass()) return false; + VectorClock other = (VectorClock) obj; + return clock.equals(other.clock); + } + + @Override + public int hashCode() { + return clock.hashCode(); + } + + @Override + public String toString() { + return "VectorClock" + clock; + } +} diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java new file mode 100644 index 00000000..ae16ff2b --- /dev/null +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/package-info.java @@ -0,0 +1,47 @@ +/** + * PAMELA Synchronization Package + * + * This package provides real-time collaborative editing capabilities for PAMELA models + * through RabbitMQ message broker integration. + * + * <h2>Key Components:</h2> + * <ul> + * <li>{@link org.openflexo.pamela.sync.SyncEditingContext} - Main entry point for synchronized editing</li> + * <li>{@link org.openflexo.pamela.sync.RabbitMQSyncManager} - Handles RabbitMQ communication</li> + * <li>{@link org.openflexo.pamela.sync.SyncOperation} - Represents a synchronizable operation</li> + * <li>{@link org.openflexo.pamela.sync.VectorClock} - Tracks causality between operations</li> + * <li>{@link org.openflexo.pamela.sync.ObjectIdentityManager} - Manages object UUIDs across replicas</li> + * </ul> + * + * <h2>Usage Example:</h2> + * <pre>{@code + * // Create a synchronized editing context + * SyncEditingContext syncContext = new SyncEditingContext(); + * + * // Configure RabbitMQ connection (optional, uses localhost by default) + * // RabbitMQSyncManager customManager = new RabbitMQSyncManager.Builder() + * // .host("rabbitmq.example.com") + * // .credentials("user", "password") + * // .build(); + * // SyncEditingContext syncContext = new SyncEditingContext(customManager); + * + * // Create a model factory with the sync context + * PamelaModelFactory factory = new PamelaModelFactory(MyModel.class); + * factory.setEditingContext(syncContext); + * syncContext.setModelFactory(factory); + * + * // Connect to RabbitMQ + * syncContext.connect(); + * + * // Now all operations on PAMELA objects will be synchronized + * MyModel model = factory.newInstance(MyModel.class); + * model.setName("Hello"); // This is broadcast to all other replicas + * + * // Disconnect when done + * syncContext.disconnect(); + * }</pre> + * + * @author PAMELA Team + * @since 2024 + */ +package org.openflexo.pamela.sync; diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java new file mode 100644 index 00000000..8055caaf --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocument.java @@ -0,0 +1,112 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import java.util.List; + +import org.openflexo.pamela.AccessibleProxyObject; +import org.openflexo.pamela.annotations.Adder; +import org.openflexo.pamela.annotations.Getter; +import org.openflexo.pamela.annotations.Getter.Cardinality; +import org.openflexo.pamela.annotations.ModelEntity; +import org.openflexo.pamela.annotations.Remover; +import org.openflexo.pamela.annotations.Setter; +import org.openflexo.pamela.annotations.XMLAttribute; +import org.openflexo.pamela.annotations.XMLElement; + +/** + * A simple PAMELA model entity representing a collaborative document. + * This entity is designed to be synchronized across multiple replicas + * using the RabbitMQ-based sync infrastructure. + * + * @author PAMELA Sync Test + */ +@ModelEntity +@XMLElement(xmlTag = "CollaborativeDocument") +public interface CollaborativeDocument extends AccessibleProxyObject { + + // Property keys + String TITLE = "title"; + String CONTENT = "content"; + String AUTHOR = "author"; + String VERSION = "version"; + String TAGS = "tags"; + String SECTIONS = "sections"; + + // ========== TITLE ========== + + @Getter(value = TITLE, defaultValue = "Untitled") + @XMLAttribute + String getTitle(); + + @Setter(TITLE) + void setTitle(String title); + + // ========== CONTENT ========== + + @Getter(value = CONTENT, defaultValue = "") + @XMLAttribute + String getContent(); + + @Setter(CONTENT) + void setContent(String content); + + // ========== AUTHOR ========== + + @Getter(value = AUTHOR, defaultValue = "Anonymous") + @XMLAttribute + String getAuthor(); + + @Setter(AUTHOR) + void setAuthor(String author); + + // ========== VERSION ========== + + @Getter(value = VERSION, defaultValue = "1") + @XMLAttribute + int getVersion(); + + @Setter(VERSION) + void setVersion(int version); + + // ========== TAGS (multi-valued) ========== + + @Getter(value = TAGS, cardinality = Cardinality.LIST) + List<String> getTags(); + + @Setter(TAGS) + void setTags(List<String> tags); + + @Adder(TAGS) + void addToTags(String tag); + + @Remover(TAGS) + void removeFromTags(String tag); + + // ========== SECTIONS (embedded entities) ========== + + @Getter(value = SECTIONS, cardinality = Cardinality.LIST) + @XMLElement + List<DocumentSection> getSections(); + + @Setter(SECTIONS) + void setSections(List<DocumentSection> sections); + + @Adder(SECTIONS) + void addToSections(DocumentSection section); + + @Remover(SECTIONS) + void removeFromSections(DocumentSection section); + +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java new file mode 100644 index 00000000..682f9e76 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java @@ -0,0 +1,363 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import static org.junit.Assert.*; + +import java.util.ArrayList; +import java.util.List; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.TimeUnit; + +import org.junit.After; +import org.junit.Before; +import org.junit.Test; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.ObjectIdentityManager; +import org.openflexo.pamela.sync.RabbitMQSyncManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; + +/** + * Test demonstrating collaborative synchronization of PAMELA objects + * across multiple replicas using RabbitMQ. + * + * This test simulates two computers (Replica A and Replica B) working on + * the same document. When Replica A modifies a property, Replica B should + * receive the change and update its local instance. + * + * PREREQUISITES: + * - RabbitMQ server must be running on localhost:5672 + * - Default guest/guest credentials (or configure as needed) + * + * To run RabbitMQ locally with Docker: + * docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management + * + * @author PAMELA Sync Test + */ +public class CollaborativeDocumentSyncTest { + + // CloudAMQP configuration + private static final String RABBITMQ_HOST = "rat.rmq2.cloudamqp.com"; + private static final int RABBITMQ_PORT = 5671; + private static final String RABBITMQ_USERNAME = "gcyabtej"; + private static final String RABBITMQ_PASSWORD = "C91PisA-dAYuoVTxHRnzU1RCU1fERHeU"; + private static final String RABBITMQ_VHOST = "gcyabtej"; + private static final boolean USE_SSL = true; + private static final String EXCHANGE_NAME = "pamela-sync-test"; + + // Replica A (simulates Computer 1) + private PamelaModelFactory factoryA; + private SyncEditingContext contextA; + private RabbitMQSyncManager syncManagerA; + + // Replica B (simulates Computer 2) + private PamelaModelFactory factoryB; + private SyncEditingContext contextB; + private RabbitMQSyncManager syncManagerB; + + // Test synchronization helpers + private List<SyncOperation> receivedOperationsA = new ArrayList<>(); + private List<SyncOperation> receivedOperationsB = new ArrayList<>(); + private CountDownLatch operationLatchB; + + @Before + public void setUp() throws Exception { + // Initialize Replica A + factoryA = new PamelaModelFactory(CollaborativeDocument.class); + contextA = new SyncEditingContext(factoryA); + factoryA.setEditingContext(contextA); + + syncManagerA = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .exchangeName(EXCHANGE_NAME) + .build(); + + // Initialize Replica B + factoryB = new PamelaModelFactory(CollaborativeDocument.class); + contextB = new SyncEditingContext(factoryB); + factoryB.setEditingContext(contextB); + + syncManagerB = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .exchangeName(EXCHANGE_NAME) + .build(); + } + + @After + public void tearDown() { + if (syncManagerA != null) { + syncManagerA.disconnect(); + } + if (syncManagerB != null) { + syncManagerB.disconnect(); + } + } + + /** + * Test that creating an object on Replica A and modifying it + * propagates the changes to Replica B. + * + * Scenario: + * 1. Replica A creates a CollaborativeDocument + * 2. Replica A sets the title to "Hello from Computer A" + * 3. Replica B receives the SET operation + * 4. Replica B applies the change to its local instance + */ + @Test + public void testSetterPropagation() throws Exception { + // Skip if RabbitMQ is not available + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available on " + RABBITMQ_HOST + ":" + RABBITMQ_PORT); + return; + } + + // Expecting CREATE + SET operations + operationLatchB = new CountDownLatch(2); + + // Connect both replicas + syncManagerA.connect(); + syncManagerB.connect(); + + // Set up listeners + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + syncManagerA.addListener(new TestOperationListener(receivedOperationsA, null)); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + // Give time for queues to be set up + Thread.sleep(500); + + // ========== REPLICA A: Create document ========== + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + + // Get the object ID assigned to docA + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + assertNotNull("Document should have an ID", docId); + System.out.println("[Replica A] Created document with ID: " + docId); + + // ========== REPLICA B: Create corresponding local instance ========== + // In a real scenario, this would be done when receiving the CREATE operation + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Replica B] Registered local document with same ID: " + docId); + + // ========== REPLICA A: Modify the document ========== + System.out.println("[Replica A] Setting title to 'Hello from Computer A'"); + docA.setTitle("Hello from Computer A"); + + // Wait for Replica B to receive both CREATE and SET operations + boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + assertTrue("Replica B should have received the operations", received); + + // Verify the operation was received + assertFalse("Replica B should have received operations", receivedOperationsB.isEmpty()); + + // Find the SET operation (last one should be SET) + SyncOperation receivedOp = receivedOperationsB.get(receivedOperationsB.size() - 1); + System.out.println("[Replica B] Received operation: " + receivedOp.getOperationType() + + " on property '" + receivedOp.getPropertyIdentifier() + "'"); + + assertEquals("Operation type should be SET", SyncOperation.OperationType.SET, receivedOp.getOperationType()); + assertEquals("Property should be 'title'", "title", receivedOp.getPropertyIdentifier()); + assertEquals("New value should match", "Hello from Computer A", receivedOp.getNewValueSerialized()); + + // Verify Replica B's document was updated + assertEquals("Replica B's document title should be updated", + "Hello from Computer A", docB.getTitle()); + + System.out.println("[Replica B] Local document title updated to: " + docB.getTitle()); + System.out.println("✓ Test passed: Setter propagation works!"); + } + + /** + * Test that adding items to a list on Replica A propagates to Replica B. + */ + @Test + public void testAdderPropagation() throws Exception { + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available"); + return; + } + + // Expecting CREATE + 2 ADD operations + operationLatchB = new CountDownLatch(3); + + // Connect replicas + syncManagerA.connect(); + syncManagerB.connect(); + + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + Thread.sleep(500); + + // Create documents + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + + // Add tags on Replica A + System.out.println("[Replica A] Adding tags 'java' and 'pamela'"); + docA.addToTags("java"); + docA.addToTags("pamela"); + + // Wait for operations + boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + assertTrue("Replica B should have received ADD operations", received); + + // Verify tags were added on Replica B + assertTrue("Replica B should have 'java' tag", docB.getTags().contains("java")); + assertTrue("Replica B should have 'pamela' tag", docB.getTags().contains("pamela")); + + System.out.println("[Replica B] Tags: " + docB.getTags()); + System.out.println("✓ Test passed: Adder propagation works!"); + } + + /** + * Test bidirectional synchronization - both replicas can make changes. + */ + @Test + public void testBidirectionalSync() throws Exception { + if (!isRabbitMQAvailable()) { + System.out.println("SKIPPING TEST: RabbitMQ not available"); + return; + } + + // Expecting CREATE + SET for each direction + CountDownLatch latchA = new CountDownLatch(2); + operationLatchB = new CountDownLatch(2); + + // Connect replicas + syncManagerA.connect(); + syncManagerB.connect(); + + contextA.setSyncManager(syncManagerA); + syncManagerA.addListener(contextA); + syncManagerA.addListener(new TestOperationListener(receivedOperationsA, latchA)); + + contextB.setSyncManager(syncManagerB); + syncManagerB.addListener(contextB); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + + Thread.sleep(500); + + // Create and register documents + CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); + String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + + CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); + contextB.getIdentityManager().registerObject(docB, docId); + + // Replica A modifies content + System.out.println("[Replica A] Setting content"); + docA.setContent("Content from A"); + + operationLatchB.await(5, TimeUnit.SECONDS); + assertEquals("Content from A", docB.getContent()); + + // Reset latch for next operation (expecting CREATE + SET from Replica B) + operationLatchB = new CountDownLatch(2); + latchA = new CountDownLatch(2); + syncManagerA.addListener(new TestOperationListener(null, latchA)); + syncManagerB.addListener(new TestOperationListener(null, operationLatchB)); + + // Replica B modifies author + System.out.println("[Replica B] Setting author"); + docB.setAuthor("User B"); + + latchA.await(5, TimeUnit.SECONDS); + assertEquals("User B", docA.getAuthor()); + + System.out.println("[Result] docA: content='" + docA.getContent() + "', author='" + docA.getAuthor() + "'"); + System.out.println("[Result] docB: content='" + docB.getContent() + "', author='" + docB.getAuthor() + "'"); + System.out.println("✓ Test passed: Bidirectional sync works!"); + } + + /** + * Check if RabbitMQ is available for testing. + */ + private boolean isRabbitMQAvailable() { + try { + RabbitMQSyncManager testManager = RabbitMQSyncManager.builder() + .host(RABBITMQ_HOST) + .port(RABBITMQ_PORT) + .credentials(RABBITMQ_USERNAME, RABBITMQ_PASSWORD) + .virtualHost(RABBITMQ_VHOST) + .useSsl(USE_SSL) + .build(); + testManager.connect(); + testManager.disconnect(); + return true; + } catch (Exception e) { + return false; + } + } + + /** + * Helper listener to capture operations for test verification. + */ + private static class TestOperationListener implements SyncOperationListener { + private final List<SyncOperation> operations; + private final CountDownLatch latch; + + public TestOperationListener(List<SyncOperation> operations, CountDownLatch latch) { + this.operations = operations; + this.latch = latch; + } + + @Override + public void onOperationReceived(SyncOperation operation) { + if (operations != null) { + operations.add(operation); + } + if (latch != null) { + latch.countDown(); + } + } + + @Override + public void onConnected() { + System.out.println(" [Listener] Connected to RabbitMQ"); + } + + @Override + public void onDisconnected(String reason) { + System.out.println(" [Listener] Disconnected from RabbitMQ: " + reason); + } + + @Override + public void onError(Throwable e) { + System.err.println(" [Listener] Error: " + e.getMessage()); + } + } +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java new file mode 100644 index 00000000..8aa12bb9 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/DocumentSection.java @@ -0,0 +1,58 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import org.openflexo.pamela.AccessibleProxyObject; +import org.openflexo.pamela.annotations.Getter; +import org.openflexo.pamela.annotations.ModelEntity; +import org.openflexo.pamela.annotations.Setter; +import org.openflexo.pamela.annotations.XMLAttribute; +import org.openflexo.pamela.annotations.XMLElement; + +/** + * A section within a collaborative document. + * Demonstrates nested entity synchronization. + * + * @author PAMELA Sync Test + */ +@ModelEntity +@XMLElement(xmlTag = "DocumentSection") +public interface DocumentSection extends AccessibleProxyObject { + + String HEADING = "heading"; + String BODY = "body"; + String ORDER = "order"; + + @Getter(value = HEADING, defaultValue = "New Section") + @XMLAttribute + String getHeading(); + + @Setter(HEADING) + void setHeading(String heading); + + @Getter(value = BODY, defaultValue = "") + @XMLAttribute + String getBody(); + + @Setter(BODY) + void setBody(String body); + + @Getter(value = ORDER, defaultValue = "0") + @XMLAttribute + int getOrder(); + + @Setter(ORDER) + void setOrder(int order); + +} diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java new file mode 100644 index 00000000..5a26d761 --- /dev/null +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/SyncInfrastructureTest.java @@ -0,0 +1,354 @@ +/** + * Copyright (c) 2013-2015, Openflexo + * + * This file is part of Pamela-core, a component of the software infrastructure + * developed at Openflexo. + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at + * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl + * and the GNU General Public License (GPL, either version 3 of the License, or any + * later version), which is available at http://www.gnu.org/licenses/gpl.html . + */ + +package org.openflexo.pamela.test.sync; + +import static org.junit.Assert.*; + +import java.util.ArrayList; +import java.util.List; + +import org.junit.Before; +import org.junit.Test; +import org.openflexo.pamela.factory.PamelaModelFactory; +import org.openflexo.pamela.sync.ObjectIdentityManager; +import org.openflexo.pamela.sync.SyncEditingContext; +import org.openflexo.pamela.sync.SyncOperation; +import org.openflexo.pamela.sync.SyncOperationListener; +import org.openflexo.pamela.sync.SyncOperationSerializer; +import org.openflexo.pamela.sync.VectorClock; + +/** + * Unit tests for the synchronization infrastructure without requiring RabbitMQ. + * These tests validate the core sync components in isolation. + * + * @author PAMELA Sync Test + */ +public class SyncInfrastructureTest { + + private PamelaModelFactory factory; + private SyncEditingContext context; + private List<SyncOperation> capturedOperations; + + @Before + public void setUp() throws Exception { + factory = new PamelaModelFactory(CollaborativeDocument.class); + context = new SyncEditingContext(factory); + factory.setEditingContext(context); + capturedOperations = new ArrayList<>(); + + // Use a mock sync manager that captures operations locally + context.setSyncManager(new LocalCaptureSyncManager(capturedOperations)); + } + + // ========== Vector Clock Tests ========== + + @Test + public void testVectorClockIncrement() { + VectorClock clock = new VectorClock(); + + assertEquals(0, clock.get("replica1")); + + clock.increment("replica1"); + assertEquals(1, clock.get("replica1")); + + clock.increment("replica1"); + assertEquals(2, clock.get("replica1")); + } + + @Test + public void testVectorClockMerge() { + VectorClock clockA = new VectorClock(); + VectorClock clockB = new VectorClock(); + + clockA.increment("A"); // A: {A=1} + clockA.increment("A"); // A: {A=2} + + clockB.increment("B"); // B: {B=1} + + clockA.merge(clockB); // A: {A=2, B=1} + + assertEquals(2, clockA.get("A")); + assertEquals(1, clockA.get("B")); + } + + @Test + public void testVectorClockHappenedBefore() { + VectorClock clock1 = new VectorClock(); + VectorClock clock2 = new VectorClock(); + + clock1.increment("A"); // {A=1} + clock2.increment("A"); // {A=1} + clock2.increment("A"); // {A=2} + + assertTrue("clock1 should happen before clock2", clock1.happenedBefore(clock2)); + assertFalse("clock2 should NOT happen before clock1", clock2.happenedBefore(clock1)); + } + + @Test + public void testVectorClockConcurrent() { + VectorClock clockA = new VectorClock(); + VectorClock clockB = new VectorClock(); + + clockA.increment("A"); // A: {A=1} + clockB.increment("B"); // B: {B=1} + + assertTrue("Concurrent operations should be detected", clockA.isConcurrent(clockB)); + assertTrue("Concurrent is symmetric", clockB.isConcurrent(clockA)); + } + + // ========== Object Identity Manager Tests ========== + + @Test + public void testObjectIdentityRegistration() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + String id1 = manager.getOrCreateObjectId(doc); + assertNotNull("Should generate ID", id1); + + String id2 = manager.getOrCreateObjectId(doc); + assertEquals("Same object should return same ID", id1, id2); + } + + @Test + public void testObjectIdentityLookup() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + String id = manager.getOrCreateObjectId(doc); + + Object retrieved = manager.getObject(id); + assertSame("Should retrieve the same object", doc, retrieved); + } + + @Test + public void testObjectIdentityExplicitRegistration() { + ObjectIdentityManager manager = new ObjectIdentityManager(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + String customId = "my-custom-id-12345"; + + manager.registerObject(doc, customId); + + assertEquals("Should use custom ID", customId, manager.getOrCreateObjectId(doc)); + assertSame("Should retrieve by custom ID", doc, manager.getObject(customId)); + } + + // ========== SyncOperation Serialization Tests ========== + + @Test + public void testSyncOperationSerialization() throws Exception { + VectorClock clock = new VectorClock(); + clock.increment("replica1"); + + SyncOperation original = new SyncOperation.Builder(SyncOperation.OperationType.SET) + .objectId("obj-123") + .entityType("CollaborativeDocument") + .propertyIdentifier("title") + .oldValue("Old Title") + .newValue("New Title") + .vectorClock(clock) + .replicaId("replica1") + .build(); + + SyncOperationSerializer serializer = new SyncOperationSerializer(); + + // Serialize to JSON + String json = serializer.serialize(original); + assertNotNull("Should serialize to JSON", json); + assertTrue("JSON should contain operation type", json.contains("SET")); + assertTrue("JSON should contain property", json.contains("title")); + + // Deserialize back + SyncOperation deserialized = serializer.deserialize(json); + assertNotNull("Should deserialize", deserialized); + assertEquals("Operation type should match", original.getOperationType(), deserialized.getOperationType()); + assertEquals("Object ID should match", original.getObjectId(), deserialized.getObjectId()); + assertEquals("Property should match", original.getPropertyIdentifier(), deserialized.getPropertyIdentifier()); + assertEquals("New value should match", original.getNewValueSerialized(), deserialized.getNewValueSerialized()); + assertEquals("Replica ID should match", original.getReplicaId(), deserialized.getReplicaId()); + } + + @Test + public void testSyncOperationBytesSerialization() throws Exception { + SyncOperation original = new SyncOperation.Builder(SyncOperation.OperationType.ADD) + .objectId("obj-456") + .entityType("CollaborativeDocument") + .propertyIdentifier("tags") + .newValue("new-tag") + .replicaId("replica2") + .build(); + + SyncOperationSerializer serializer = new SyncOperationSerializer(); + + byte[] bytes = serializer.serializeToBytes(original); + assertNotNull("Should serialize to bytes", bytes); + assertTrue("Bytes should not be empty", bytes.length > 0); + + SyncOperation deserialized = serializer.deserializeFromBytes(bytes); + assertNotNull("Should deserialize from bytes", deserialized); + assertEquals(SyncOperation.OperationType.ADD, deserialized.getOperationType()); + assertEquals("tags", deserialized.getPropertyIdentifier()); + } + + // ========== SyncEditingContext Operation Capture Tests ========== + + @Test + public void testSetOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + // Modify the document + doc.setTitle("Test Title"); + + // Check that a SET operation was captured + assertFalse("Should capture SET operation", capturedOperations.isEmpty()); + + SyncOperation op = findOperationByProperty("title"); + assertNotNull("Should have title operation", op); + assertEquals(SyncOperation.OperationType.SET, op.getOperationType()); + assertEquals("Test Title", op.getNewValueSerialized()); + } + + @Test + public void testAddOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + // Add a tag + doc.addToTags("java"); + + // Check that an ADD operation was captured + SyncOperation op = findOperationByProperty("tags"); + assertNotNull("Should have tags operation", op); + assertEquals(SyncOperation.OperationType.ADD, op.getOperationType()); + assertEquals("java", op.getNewValueSerialized()); + } + + @Test + public void testRemoveOperationCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + doc.addToTags("java"); + + capturedOperations.clear(); // Clear the ADD operation + + // Remove the tag + doc.removeFromTags("java"); + + // Check that a REMOVE operation was captured + SyncOperation op = findOperationByProperty("tags"); + assertNotNull("Should have tags operation", op); + assertEquals(SyncOperation.OperationType.REMOVE, op.getOperationType()); + } + + @Test + public void testMultipleOperationsCapture() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + + doc.setTitle("My Document"); + doc.setAuthor("John Doe"); + doc.setContent("Some content here"); + doc.addToTags("tag1"); + doc.addToTags("tag2"); + + // Should have captured multiple operations + assertTrue("Should have multiple operations", capturedOperations.size() >= 5); + + // Verify we have the expected operations + assertNotNull("Should have title op", findOperationByProperty("title")); + assertNotNull("Should have author op", findOperationByProperty("author")); + assertNotNull("Should have content op", findOperationByProperty("content")); + } + + // ========== Nested Entity Tests ========== + + @Test + public void testNestedEntityOperations() { + capturedOperations.clear(); + + CollaborativeDocument doc = factory.newInstance(CollaborativeDocument.class); + DocumentSection section = factory.newInstance(DocumentSection.class); + + section.setHeading("Introduction"); + section.setBody("This is the introduction section."); + + capturedOperations.clear(); + + doc.addToSections(section); + + // Should capture the ADD operation for sections + SyncOperation op = findOperationByProperty("sections"); + assertNotNull("Should have sections ADD operation", op); + assertEquals(SyncOperation.OperationType.ADD, op.getOperationType()); + } + + // ========== Helper Methods ========== + + private SyncOperation findOperationByProperty(String propertyName) { + for (SyncOperation op : capturedOperations) { + if (propertyName.equals(op.getPropertyIdentifier())) { + return op; + } + } + return null; + } + + /** + * A local mock sync manager that captures operations without network communication. + */ + private static class LocalCaptureSyncManager implements org.openflexo.pamela.sync.SyncManager { + private final List<SyncOperation> capturedOperations; + private final List<SyncOperationListener> listeners = new ArrayList<>(); + + public LocalCaptureSyncManager(List<SyncOperation> capturedOperations) { + this.capturedOperations = capturedOperations; + } + + @Override + public void publishOperation(SyncOperation operation) { + capturedOperations.add(operation); + // Notify listeners (simulating message reception) + for (SyncOperationListener listener : listeners) { + listener.onOperationReceived(operation); + } + } + + @Override + public void addListener(SyncOperationListener listener) { + listeners.add(listener); + } + + @Override + public void removeListener(SyncOperationListener listener) { + listeners.remove(listener); + } + + @Override + public boolean isConnected() { + return true; + } + + @Override + public String getReplicaId() { + return "test-replica"; + } + } +} diff --git a/settings.gradle b/settings.gradle index 0e0b8df5..ace68624 100644 --- a/settings.gradle +++ b/settings.gradle @@ -1,4 +1,5 @@ include 'pamela-core' include 'pamela-security-patterns' +include 'book' //include 'pamela-perf-tests' //include 'pamela-spring-security-uc' From c9ba3b8c2799b145ac7378fed6df1d5a101032c3 Mon Sep 17 00:00:00 2001 From: m23loure <margot.lourencodasilva@gmail.com> Date: Tue, 13 Jan 2026 13:51:17 +0100 Subject: [PATCH 5/8] refacto de la partie reception des actions d'un autre replica --- .../pamela/sync/SyncEditingContext.java | 117 ++++-------------- 1 file changed, 26 insertions(+), 91 deletions(-) diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java index 7f6f3fbd..3d7044aa 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -346,22 +346,16 @@ public void onOperationReceived(SyncOperation operation) { applyingRemoteOperation.set(true); try { - switch (operation.getOperationType()) { - case SET: - applyRemoteSet(operation); - break; - case ADD: - applyRemoteAdd(operation); - break; - case REMOVE: - applyRemoteRemove(operation); - break; + switch (operation.getOperationType()) { case CREATE: applyRemoteCreate(operation); break; case DELETE: applyRemoteDelete(operation); break; + case SET: case ADD: case REMOVE: + applyRemoteModification(operation); + break; default: logger.warning("Unknown operation type: " + operation.getOperationType()); } @@ -859,97 +853,43 @@ private String unescapeJson(String value) { // Private methods for applying remote operations - private void applyRemoteSet(SyncOperation operation) { + private void applyRemoteModification(SyncOperation operation){ Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - // Object doesn't exist yet - try to create it first - // This can happen if SET arrives before CREATE due to message ordering - target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - if (target == null) { - logger.warning("Target object not found for SET: " + operation.getObjectId()); - return; - } - } - - try { - ProxyMethodHandler<?> handler = modelFactory.getHandler(target); - if (handler != null) { - ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); - if (property != null) { - Object newValue = valueSerializer.deserialize( - operation.getNewValueSerialized(), - property.getType(), - this - ); - handler.invokeSetter(operation.getPropertyIdentifier(), newValue); - } - } - } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote SET", e); - } - } - - private void applyRemoteAdd(SyncOperation operation) { - logger.info("Applying remote ADD: objectId=" + operation.getObjectId() - + " property=" + operation.getPropertyIdentifier() - + " value=" + operation.getNewValueSerialized()); + if (target == null) + // Object doesn't exist yet - try to create it first (might happen because of reordering operations) + target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - // Object doesn't exist yet - try to create it first - target = ensureRemoteObjectExists(operation.getObjectId(), operation.getEntityType()); - if (target == null) { - logger.warning("Target object not found for ADD: " + operation.getObjectId()); - return; - } - } - try { ProxyMethodHandler<?> handler = modelFactory.getHandler(target); if (handler != null) { ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); if (property != null) { - Object value = valueSerializer.deserialize( + Object newValue = valueSerializer.deserialize( operation.getNewValueSerialized(), property.getType(), this ); - logger.info("Deserialized value for ADD: " + value + " (type=" + (value != null ? value.getClass().getName() : "null") + ")"); - // Use property identifier string - handler.invokeAdder(operation.getPropertyIdentifier(), value); - logger.info("Successfully added to collection"); + switch(operation.getOperationType()){ + case SET: + handler.invokeSetter(operation.getPropertyIdentifier(), newValue); + break; + case ADD: + handler.invokeAdder(operation.getPropertyIdentifier(), newValue); + break; + case REMOVE: + handler.invokeRemover(operation.getPropertyIdentifier(), newValue); + break; + default: + break; + } } } } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote ADD", e); - } - } - - private void applyRemoteRemove(SyncOperation operation) { - Object target = identityManager.getObject(operation.getObjectId()); - if (target == null) { - logger.warning("Target object not found for REMOVE: " + operation.getObjectId()); - return; - } - - try { - ProxyMethodHandler<?> handler = modelFactory.getHandler(target); - if (handler != null) { - ModelProperty<?> property = handler.getModelEntity().getModelProperty(operation.getPropertyIdentifier()); - if (property != null) { - Object value = valueSerializer.deserialize( - operation.getOldValueSerialized(), - property.getType(), - this - ); - handler.invokeRemover(operation.getPropertyIdentifier(), value); - } - } - } catch (Exception e) { - logger.log(Level.SEVERE, "Failed to apply remote REMOVE", e); + logger.log(Level.SEVERE, "Failed to apply" + operation.getOperationType(), e); } } + private void applyRemoteCreate(SyncOperation operation) { // Check if object already exists if (identityManager.hasObject(operation.getObjectId())) { @@ -1003,6 +943,7 @@ private void applyRemoteDelete(SyncOperation operation) { } catch (Exception e) { logger.log(Level.SEVERE, "Failed to apply remote DELETE", e); } + } /** @@ -1013,13 +954,7 @@ private void applyRemoteDelete(SyncOperation operation) { * @param entityType the entity class name * @return the object, or null if creation failed */ - private Object ensureRemoteObjectExists(String objectId, String entityType) { - // Check again if it exists now - Object existing = identityManager.getObject(objectId); - if (existing != null) { - return existing; - } - + private Object ensureRemoteObjectExists(String objectId, String entityType) { if (entityType == null) { logger.warning("Cannot create object without entityType for ID: " + objectId); return null; From acc664cb8f318c14974e40fe4a494e94d14c0350 Mon Sep 17 00:00:00 2001 From: NGUENGOUE WATCHO Serena Ginger <serena.nguengoue-watcho@imt-atlantique.net> Date: Thu, 15 Jan 2026 16:39:41 +0100 Subject: [PATCH 6/8] Fix: AtomicEdits now correctly tagged with remote replicaId When applying remote operations, AtomicEdits were incorrectly tagged with the local replicaId instead of the remote replica's ID. This caused the UndoManager to not filter out remote edits properly. Changes: - Added ThreadLocal<String> currentRemoteReplicaId in SyncEditingContext - Added getCurrentOperationReplicaId() method that returns the remote replicaId when applying a remote operation, otherwise the local one - Modified onOperationReceived() to set currentRemoteReplicaId before applying remote operations - Modified onStateReceived() to set currentRemoteReplicaId before restoring from snapshot - Updated ProxyMethodHandler.getCurrentReplicaId() to use the new getCurrentOperationReplicaId() method Now each replica can only undo its own AtomicEdits, not those from other replicas. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com> --- .../pamela/factory/ProxyMethodHandler.java | 2 +- .../pamela/sync/SyncEditingContext.java | 34 ++++++++++++++++--- 2 files changed, 30 insertions(+), 6 deletions(-) diff --git a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java index f47b1c4d..c9b464b1 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/factory/ProxyMethodHandler.java @@ -239,7 +239,7 @@ private String getCurrentReplicaId() { EditingContext context = getModelFactory().getEditingContext(); if (context instanceof org.openflexo.pamela.sync.SyncEditingContext) { org.openflexo.pamela.sync.SyncEditingContext syncContext = (org.openflexo.pamela.sync.SyncEditingContext) context; - return syncContext.getReplicaId(); + return syncContext.getCurrentOperationReplicaId(); } return null; } diff --git a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java index 8058de12..42d64218 100644 --- a/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java +++ b/pamela-core/src/main/java/org/openflexo/pamela/sync/SyncEditingContext.java @@ -43,7 +43,11 @@ public class SyncEditingContext extends EditingContextImpl implements SyncOperat // Flag to prevent recursive sync when applying remote operations private final ThreadLocal<Boolean> applyingRemoteOperation = ThreadLocal.withInitial(() -> false); - + + // Stores the replicaId of the remote operation currently being applied + // Used by ProxyMethodHandler.getCurrentReplicaId() to tag AtomicEdits with the correct replicaId + private final ThreadLocal<String> currentRemoteReplicaId = new ThreadLocal<>(); + // Buffer for operations during object creation (ensures CREATE is sent before SETs) // Key: objectId, Value: list of buffered operations private final Map<String, List<SyncOperation>> pendingOperations = new ConcurrentHashMap<>(); @@ -138,6 +142,20 @@ public boolean isApplyingRemoteOperation() { return applyingRemoteOperation.get(); } + /** + * Get the replicaId of the operation currently being processed. + * If applying a remote operation, returns the remote replica's ID. + * Otherwise, returns the local replica's ID. + * This is used by ProxyMethodHandler to tag AtomicEdits with the correct replicaId. + */ + public String getCurrentOperationReplicaId() { + String remoteId = currentRemoteReplicaId.get(); + if (remoteId != null) { + return remoteId; + } + return getReplicaId(); + } + /** * Get the interface name for a PAMELA object. * Returns the implemented interface name (e.g., "org.example.Book") instead of @@ -345,8 +363,9 @@ public void onOperationReceived(SyncOperation operation) { } applyingRemoteOperation.set(true); + currentRemoteReplicaId.set(operation.getReplicaId()); try { - switch (operation.getOperationType()) { + switch (operation.getOperationType()) { case CREATE: applyRemoteCreate(operation); break; @@ -355,7 +374,7 @@ public void onOperationReceived(SyncOperation operation) { break; case SET: case ADD: case REMOVE: applyRemoteModification(operation); - break; + break; default: logger.warning("Unknown operation type: " + operation.getOperationType()); } @@ -363,6 +382,7 @@ public void onOperationReceived(SyncOperation operation) { logger.log(Level.SEVERE, "Failed to apply remote operation: " + operation, e); } finally { applyingRemoteOperation.set(false); + currentRemoteReplicaId.remove(); } } @@ -405,14 +425,18 @@ public void onStateRequested(String requestingReplicaId) { @Override public void onStateReceived(String stateSnapshot, String fromReplicaId) { logger.info("State received from replica: " + fromReplicaId); - + // Mark state as received to prevent duplicate requests stateReceived = true; - + + // Set the remote replicaId so AtomicEdits are tagged correctly + currentRemoteReplicaId.set(fromReplicaId); try { restoreFromSnapshot(stateSnapshot); } catch (Exception e) { logger.log(Level.SEVERE, "Failed to restore from snapshot", e); + } finally { + currentRemoteReplicaId.remove(); } } From 83f90a9c8c171b5d45c1ba480645ae80ae61d4c1 Mon Sep 17 00:00:00 2001 From: TeodoreAutuly <teodore@autuly.com> Date: Fri, 16 Jan 2026 09:16:02 +0100 Subject: [PATCH 7/8] Correction CollaborativeDocumentSyncTest --- .../sync/CollaborativeDocumentSyncTest.java | 54 ++++++++++--------- 1 file changed, 29 insertions(+), 25 deletions(-) diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java index 682f9e76..59a8d0c8 100644 --- a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java @@ -159,12 +159,6 @@ public void testSetterPropagation() throws Exception { assertNotNull("Document should have an ID", docId); System.out.println("[Replica A] Created document with ID: " + docId); - // ========== REPLICA B: Create corresponding local instance ========== - // In a real scenario, this would be done when receiving the CREATE operation - CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); - contextB.getIdentityManager().registerObject(docB, docId); - System.out.println("[Replica B] Registered local document with same ID: " + docId); - // ========== REPLICA A: Modify the document ========== System.out.println("[Replica A] Setting title to 'Hello from Computer A'"); docA.setTitle("Hello from Computer A"); @@ -185,6 +179,10 @@ public void testSetterPropagation() throws Exception { assertEquals("Property should be 'title'", "title", receivedOp.getPropertyIdentifier()); assertEquals("New value should match", "Hello from Computer A", receivedOp.getNewValueSerialized()); + // Get the object created on Replica B by the remote CREATE operation + CollaborativeDocument docB = (CollaborativeDocument) contextB.getIdentityManager().getObject(docId); + assertNotNull("Replica B should have created the document via applyRemoteCreate", docB); + // Verify Replica B's document was updated assertEquals("Replica B's document title should be updated", "Hello from Computer A", docB.getTitle()); @@ -219,21 +217,23 @@ public void testAdderPropagation() throws Exception { Thread.sleep(500); - // Create documents + // Create document on Replica A CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); - - CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); - contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Replica A] Created document with ID: " + docId); // Add tags on Replica A System.out.println("[Replica A] Adding tags 'java' and 'pamela'"); docA.addToTags("java"); docA.addToTags("pamela"); - // Wait for operations + // Wait for operations (CREATE + 2 ADD) boolean received = operationLatchB.await(5, TimeUnit.SECONDS); - assertTrue("Replica B should have received ADD operations", received); + assertTrue("Replica B should have received CREATE + ADD operations", received); + + // Get the object created on Replica B by the remote CREATE operation + CollaborativeDocument docB = (CollaborativeDocument) contextB.getIdentityManager().getObject(docId); + assertNotNull("Replica B should have created the document via applyRemoteCreate", docB); // Verify tags were added on Replica B assertTrue("Replica B should have 'java' tag", docB.getTags().contains("java")); @@ -253,8 +253,7 @@ public void testBidirectionalSync() throws Exception { return; } - // Expecting CREATE + SET for each direction - CountDownLatch latchA = new CountDownLatch(2); + // Expecting CREATE + SET from Replica A operationLatchB = new CountDownLatch(2); // Connect replicas @@ -263,7 +262,7 @@ public void testBidirectionalSync() throws Exception { contextA.setSyncManager(syncManagerA); syncManagerA.addListener(contextA); - syncManagerA.addListener(new TestOperationListener(receivedOperationsA, latchA)); + syncManagerA.addListener(new TestOperationListener(receivedOperationsA, null)); contextB.setSyncManager(syncManagerB); syncManagerB.addListener(contextB); @@ -271,31 +270,36 @@ public void testBidirectionalSync() throws Exception { Thread.sleep(500); - // Create and register documents + // Replica A creates document and sets content + // Replica B will automatically receive CREATE and create its local instance CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); - - CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); - contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Replica A] Created document with ID: " + docId); // Replica A modifies content System.out.println("[Replica A] Setting content"); docA.setContent("Content from A"); - operationLatchB.await(5, TimeUnit.SECONDS); + // Wait for Replica B to receive CREATE + SET + boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + assertTrue("Replica B should have received CREATE + SET", received); + + // Get the object created on Replica B by the remote CREATE operation + CollaborativeDocument docB = (CollaborativeDocument) contextB.getIdentityManager().getObject(docId); + assertNotNull("Replica B should have created the document via applyRemoteCreate", docB); assertEquals("Content from A", docB.getContent()); + System.out.println("[Replica B] Document received with content: " + docB.getContent()); - // Reset latch for next operation (expecting CREATE + SET from Replica B) - operationLatchB = new CountDownLatch(2); - latchA = new CountDownLatch(2); + // Reset latch for Replica B -> Replica A direction (expecting only SET) + CountDownLatch latchA = new CountDownLatch(1); syncManagerA.addListener(new TestOperationListener(null, latchA)); - syncManagerB.addListener(new TestOperationListener(null, operationLatchB)); // Replica B modifies author System.out.println("[Replica B] Setting author"); docB.setAuthor("User B"); - latchA.await(5, TimeUnit.SECONDS); + received = latchA.await(5, TimeUnit.SECONDS); + assertTrue("Replica A should have received SET from Replica B", received); assertEquals("User B", docA.getAuthor()); System.out.println("[Result] docA: content='" + docA.getContent() + "', author='" + docA.getAuthor() + "'"); From a7daeafb8e5c7026acf70e182a8b320c0bfb3177 Mon Sep 17 00:00:00 2001 From: samuelyao107 <samuelyao107@gmail.com> Date: Fri, 16 Jan 2026 10:51:02 +0100 Subject: [PATCH 8/8] correction tests sync --- .../sync/CollaborativeDocumentSyncTest.java | 175 ++++++++++++------ 1 file changed, 116 insertions(+), 59 deletions(-) diff --git a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java index 682f9e76..c98d3094 100644 --- a/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java +++ b/pamela-core/src/test/java/org/openflexo/pamela/test/sync/CollaborativeDocumentSyncTest.java @@ -1,13 +1,13 @@ /** * Copyright (c) 2013-2015, Openflexo - * - * This file is part of Pamela-core, a component of the software infrastructure + * + * This file is part of Pamela-core, a component of the software infrastructure * developed at Openflexo. - * - * Openflexo is dual-licensed under the European Union Public License (EUPL, either - * version 1.1 of the License, or any later version ), which is available at + * + * Openflexo is dual-licensed under the European Union Public License (EUPL, either + * version 1.1 of the License, or any later version ), which is available at * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl - * and the GNU General Public License (GPL, either version 3 of the License, or any + * and the GNU General Public License (GPL, either version 3 of the License, or any * later version), which is available at http://www.gnu.org/licenses/gpl.html . */ @@ -33,18 +33,18 @@ /** * Test demonstrating collaborative synchronization of PAMELA objects * across multiple replicas using RabbitMQ. - * + * * This test simulates two computers (Replica A and Replica B) working on * the same document. When Replica A modifies a property, Replica B should * receive the change and update its local instance. - * + * * PREREQUISITES: * - RabbitMQ server must be running on localhost:5672 * - Default guest/guest credentials (or configure as needed) - * + * * To run RabbitMQ locally with Docker: * docker run -d --name rabbitmq -p 5672:5672 -p 15672:15672 rabbitmq:3-management - * + * * @author PAMELA Sync Test */ public class CollaborativeDocumentSyncTest { @@ -117,7 +117,7 @@ public void tearDown() { /** * Test that creating an object on Replica A and modifying it * propagates the changes to Replica B. - * + * * Scenario: * 1. Replica A creates a CollaborativeDocument * 2. Replica A sets the title to "Hello from Computer A" @@ -132,9 +132,6 @@ public void testSetterPropagation() throws Exception { return; } - // Expecting CREATE + SET operations - operationLatchB = new CountDownLatch(2); - // Connect both replicas syncManagerA.connect(); syncManagerB.connect(); @@ -146,14 +143,18 @@ public void testSetterPropagation() throws Exception { contextB.setSyncManager(syncManagerB); syncManagerB.addListener(contextB); - syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, null)); // Don't use latch yet - // Give time for queues to be set up - Thread.sleep(500); + // Give time for queues to be set up and flush any old messages + Thread.sleep(1000); + + // NOW clear any stale operations + receivedOperationsB.clear(); + receivedOperationsA.clear(); // ========== REPLICA A: Create document ========== CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); - + // Get the object ID assigned to docA String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); assertNotNull("Document should have an ID", docId); @@ -165,6 +166,10 @@ public void testSetterPropagation() throws Exception { contextB.getIdentityManager().registerObject(docB, docId); System.out.println("[Replica B] Registered local document with same ID: " + docId); + // Now set up the countdown latch for the operations we care about + operationLatchB = new CountDownLatch(2); // CREATE + SET + syncManagerB.addListener(new TestOperationListener(null, operationLatchB)); + // ========== REPLICA A: Modify the document ========== System.out.println("[Replica A] Setting title to 'Hello from Computer A'"); docA.setTitle("Hello from Computer A"); @@ -173,26 +178,44 @@ public void testSetterPropagation() throws Exception { boolean received = operationLatchB.await(5, TimeUnit.SECONDS); assertTrue("Replica B should have received the operations", received); + // Small wait to ensure all operations are processed + Thread.sleep(200); + // Verify the operation was received assertFalse("Replica B should have received operations", receivedOperationsB.isEmpty()); - - // Find the SET operation (last one should be SET) - SyncOperation receivedOp = receivedOperationsB.get(receivedOperationsB.size() - 1); - System.out.println("[Replica B] Received operation: " + receivedOp.getOperationType() - + " on property '" + receivedOp.getPropertyIdentifier() + "'"); - - assertEquals("Operation type should be SET", SyncOperation.OperationType.SET, receivedOp.getOperationType()); - assertEquals("Property should be 'title'", "title", receivedOp.getPropertyIdentifier()); - assertEquals("New value should match", "Hello from Computer A", receivedOp.getNewValueSerialized()); + + // Debug: print all received operations + System.out.println("[DEBUG] Total operations received: " + receivedOperationsB.size()); + for (SyncOperation op : receivedOperationsB) { + System.out.println(" - " + op.getOperationType() + " on objectId=" + op.getObjectId() + " property=" + op.getPropertyIdentifier()); + } + + // Find the SET operation for this specific document + SyncOperation setOp = null; + for (SyncOperation op : receivedOperationsB) { + if (op.getOperationType() == SyncOperation.OperationType.SET + && "title".equals(op.getPropertyIdentifier()) + && docId.equals(op.getObjectId())) { + setOp = op; + break; + } + } + + assertNotNull("Should have received a SET operation for title", setOp); + System.out.println("[Replica B] Received operation: " + setOp.getOperationType() + + " on property '" + setOp.getPropertyIdentifier() + "'"); + + assertEquals("Operation type should be SET", SyncOperation.OperationType.SET, setOp.getOperationType()); + assertEquals("Property should be 'title'", "title", setOp.getPropertyIdentifier()); + assertEquals("New value should match", "Hello from Computer A", setOp.getNewValueSerialized()); // Verify Replica B's document was updated - assertEquals("Replica B's document title should be updated", + assertEquals("Replica B's document title should be updated", "Hello from Computer A", docB.getTitle()); System.out.println("[Replica B] Local document title updated to: " + docB.getTitle()); System.out.println("✓ Test passed: Setter propagation works!"); } - /** * Test that adding items to a list on Replica A propagates to Replica B. */ @@ -217,24 +240,47 @@ public void testAdderPropagation() throws Exception { syncManagerB.addListener(contextB); syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); - Thread.sleep(500); + Thread.sleep(1000); // Increased wait time - // Create documents + // Create document on Replica A ONLY CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + System.out.println("[Replica A] Created document with ID: " + docId); + + // Wait for CREATE operation to propagate + Thread.sleep(500); + + // NOW create the corresponding object on Replica B + // This should ideally happen automatically when CREATE is received, + // but for this test we do it manually CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Replica B] Registered local document with same ID: " + docId); + + // Reset latch for just the ADD operations + operationLatchB = new CountDownLatch(2); + syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); // Add tags on Replica A System.out.println("[Replica A] Adding tags 'java' and 'pamela'"); docA.addToTags("java"); docA.addToTags("pamela"); - // Wait for operations - boolean received = operationLatchB.await(5, TimeUnit.SECONDS); + // Wait for ADD operations + boolean received = operationLatchB.await(10, TimeUnit.SECONDS); // Increased timeout assertTrue("Replica B should have received ADD operations", received); + // Debug: Print received operations + System.out.println("[Replica B] Received " + receivedOperationsB.size() + " operations"); + for (SyncOperation op : receivedOperationsB) { + System.out.println(" - " + op.getOperationType() + " on " + op.getPropertyIdentifier()); + } + + // Debug: Print current tags + System.out.println("[Replica B] Current tags: " + docB.getTags()); + System.out.println("[Replica B] Tags size: " + docB.getTags().size()); + // Verify tags were added on Replica B assertTrue("Replica B should have 'java' tag", docB.getTags().contains("java")); assertTrue("Replica B should have 'pamela' tag", docB.getTags().contains("pamela")); @@ -253,56 +299,67 @@ public void testBidirectionalSync() throws Exception { return; } - // Expecting CREATE + SET for each direction - CountDownLatch latchA = new CountDownLatch(2); - operationLatchB = new CountDownLatch(2); - // Connect replicas syncManagerA.connect(); syncManagerB.connect(); contextA.setSyncManager(syncManagerA); syncManagerA.addListener(contextA); - syncManagerA.addListener(new TestOperationListener(receivedOperationsA, latchA)); contextB.setSyncManager(syncManagerB); syncManagerB.addListener(contextB); - syncManagerB.addListener(new TestOperationListener(receivedOperationsB, operationLatchB)); - Thread.sleep(500); + Thread.sleep(1000); - // Create and register documents + // ========== FIRST: Test A -> B (we know this works) ========== CollaborativeDocument docA = factoryA.newInstance(CollaborativeDocument.class); String docId = contextA.getIdentityManager().getOrCreateObjectId(docA); + System.out.println("[Test] Created docA with ID: " + docId); + + Thread.sleep(500); CollaborativeDocument docB = factoryB.newInstance(CollaborativeDocument.class); contextB.getIdentityManager().registerObject(docB, docId); + System.out.println("[Test] Registered docB with same ID"); - // Replica A modifies content - System.out.println("[Replica A] Setting content"); + System.out.println("\n[TEST 1] A -> B: Setting content on A"); docA.setContent("Content from A"); - - operationLatchB.await(5, TimeUnit.SECONDS); + Thread.sleep(1000); + assertEquals("Content from A", docB.getContent()); + System.out.println("[✓] A -> B works"); - // Reset latch for next operation (expecting CREATE + SET from Replica B) - operationLatchB = new CountDownLatch(2); - latchA = new CountDownLatch(2); - syncManagerA.addListener(new TestOperationListener(null, latchA)); - syncManagerB.addListener(new TestOperationListener(null, operationLatchB)); + // ========== SECOND: Test B -> A (this is failing) ========== + // The problem: docB was created BEFORE syncManagerB was attached, + // so changes to docB aren't being tracked! - // Replica B modifies author - System.out.println("[Replica B] Setting author"); - docB.setAuthor("User B"); + // Let's try creating a FRESH document on B AFTER sync is set up + System.out.println("\n[TEST 2] B -> A: Creating NEW document on B"); - latchA.await(5, TimeUnit.SECONDS); - assertEquals("User B", docA.getAuthor()); + CollaborativeDocument docB2 = factoryB.newInstance(CollaborativeDocument.class); + String docId2 = contextB.getIdentityManager().getOrCreateObjectId(docB2); + System.out.println("[Test] Created docB2 with ID: " + docId2); - System.out.println("[Result] docA: content='" + docA.getContent() + "', author='" + docA.getAuthor() + "'"); - System.out.println("[Result] docB: content='" + docB.getContent() + "', author='" + docB.getAuthor() + "'"); - System.out.println("✓ Test passed: Bidirectional sync works!"); - } + Thread.sleep(500); + // Register corresponding object on A + CollaborativeDocument docA2 = factoryA.newInstance(CollaborativeDocument.class); + contextA.getIdentityManager().registerObject(docA2, docId2); + System.out.println("[Test] Registered docA2 with same ID"); + + // NOW try to modify docB2 + System.out.println("[Test] Setting author on docB2"); + docB2.setAuthor("User from B"); + Thread.sleep(2000); + + System.out.println("[Debug] docA2.getAuthor() = " + docA2.getAuthor()); + System.out.println("[Debug] docB2.getAuthor() = " + docB2.getAuthor()); + + assertEquals("User from B", docA2.getAuthor()); + System.out.println("[✓] B -> A works"); + + System.out.println("\n✓ Bidirectional sync works!"); + } /** * Check if RabbitMQ is available for testing. */