Spring Boot example with Kafka

Setup:

1. cd kafka
2. docker-compose up -d

Run:

1. mvn -pl kafka-producer-module spring-boot:run
2. mvn -pl kafka-consumer-module spring-boot:run

Features:

• sending text message to kafka
• sending POJO messag to kafka (json)
• consuming single and JSON messages from kafka
• consuming messages from multiple topics
• kafka message error handling with DLQ and retry logic