Calculator API - Java Assessment

This project implements a RESTful calculator API with operations: sum, subtraction, multiplication, and division. It uses Spring Boot with Kafka for inter-module communication.

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Prerequisites

• Java 17+ (or compatible with your Spring Boot version)
• Gradle
• Docker & Docker Compose installed
• Linux environment (sudo access required for Docker commands)

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Running the Application

1. Start Docker services first

Before running the application, navigate to the docker folder and start Kafka and related services:

cd docker
sudo docker compose up -d

2. Build the project

From the root source folder, run:

./gradlew build

3. Run the Spring Boot application

./gradlew bootRun

Testing the API

Test the endpoints using a web browser or tools like curl or Postman:

GET http://localhost:8080/sum?a=5&b=3

Expected response:

{
  "result": "8"
}

Logging

Application logs are saved at:

/home/avareno/Proj/wit/demo/logs/wit-app.log

Configured with Logback file appender.

Notes

Make sure Docker is running before starting the Spring Boot app.

Kafka must be up for proper inter-module communication.