"CRM" Application

This is a Spring Boot application that demonstrates Change Data Capture (CDC) using Debezium.

Prerequisites

• Java 17 or later
• Docker and Docker Compose
• Gradle

Components

1. Spring Boot Application

• Swagger UI for API documentation
• RabbitMQ consumer for Debezium events
• RabbitMQ producer for sending events to external consumers

2. PostgreSQL Database

• CRM data
• Configured with logical replication for CDC

3. RabbitMQ

• Message broker for Debezium events
• Management interface available
• Message broker for consumers

Access Points

• Spring Boot Application: http://localhost:8080
• Swagger UI: http://localhost:8080/swagger-ui.html
• RabbitMQ Management: http://localhost:15672

Debezium Event Flow

1. Changes in the tracked tables are captured by Debezium
2. Events are published to RabbitMQ topic exchange crm.update.exchange
3. Spring Boot application consumes events from queue debezium_crm_db.change.TABLENAME_queue with sourceKey crm_changes
4. Events are logged with operation type (create/update/delete)
5. Spring Boot application parses the events and forwards to external consumers using exchange name crm.update.exchange and routingKey crm.update.*