Spring Boot Kafka Integration: Event-Driven Architecture with Spring Data JPA
Explanation: The User sends an HTTP POST request to create an order. OrderController forwards the request to OrderService . OrderService persists the order using OrderRepository (Spring Data JPA). After saving, it converts the order to JSON and sends it to KafkaProducerService . The KafkaProducerService publishes the message to Kafka . The KafkaConsumerService listens to the "order_topic" and processes the order asynchronously. Here's a complete guide on integrating Spring Data JPA with Apache Kafka for an Event-Driven Architecture from scratch. 1. Overview We'll build a system where: A Spring Boot application persists data using Spring Data JPA . When an entity is saved, an event is published to Kafka . A Kafka consumer listens for messages and processes them asynchronously. 2. Project Setup Dependencies (Maven) Add the following dependencies to your pom.xml : < dependencies > <!-- Spring Boot Starter for JPA --> < dependency ...