CSCI-605 Recitation - week 11

Here you will find a couple of code snippets as well as some notes used in RIT course CSCI605's recitation sessions.

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HW10.1: Counting numbers

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-477.html

HW10.2: Reading files

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-478.html

HW10.3: Password modification detection

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-479.html

HW11.1: Parallel infinite series

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-481.html

HW11.2: Parallelized computation with shared and local variables

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-482.html

HW11.3: Marble pickup game with synchronization

https://www.cs.rit.edu/~hpb/Lectures/2211/605/605-483.html

Synchronized block 1

• Thread_5.java
• Will any thread other than the main one run in parallel?
• How can we make second go before 1st?

Synchronized block 2

• Thread_5b.java
• Will any thread run in parallel? Why?

Wait-Notify 1: Provider-Consumer Protocol [1]

• {Drop, Consumer, Producer, ProducerConsumerExample}.java
• Go through code (drawings might help)
• How many messages can be stored by a Drop instance at any time?
• Which class uses the wait/notify mechanism? What for?
• Which code blocks/signatures use the synchronized keyword?
• How is the flag 'empty' being used?

Wait-Notify 2: Sender-Receiver Synchronization [2]

• {Data, Sender, Receiver, NetworkDriver}.java
• Go through code (drawings might help)
• How related is the send/receive protocol to the producer/consumer one?
• What are the differences?

[1] Code from https://docs.oracle.com/javase/tutorial/essential/concurrency /guardmeth.html

[2] Code from https://github.com/eugenp/tutorials/tree/master/core-java -modules/core-java-concurrency-basic-2/src/main/java/com/baeldung/concurrent/waitandnotify

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Please let me know if you have any questions. You can always use MyCourses discussion forum (good idea) or email me or Professor Bischof. I will reply the questions either to the discussion forum or will email everyone so every student can benefit from the answers provided.

Cheers, eduardo.lima at mail.rit.edu