Thursday, 19 January 2023

Spring Boot – Send Custom Object into Kafka Topic & Consume Custom Object From Kafka Topic

🚀 Simplify Your Spring Boot Kafka!

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Spring Boot & Kafka: Sending and Consuming JSON Objects

Managing complex data between microservices is a breeze with Spring Boot and Kafka. In this tutorial, we "simplify" the process of Sending and Consuming Custom JSON Objects through a complete end-to-end example.

The End-to-End Pipeline

We walk through two separate Spring Boot applications—a producer and a consumer—to demonstrate the data flow:

Producer Setup: Configuring KafkaTemplate to handle custom Java objects (like our Animal class) and publishing them via a REST endpoint.
Consumer Setup: Implementing @KafkaListener with a ConcurrentKafkaListenerContainerFactory to seamlessly receive and process JSON payloads.
Object Mapping: Ensuring the Animal class structure and package names match on both sides for successful deserialization.
REST Testing: Using Postman to send JSON data (e.g., Lion, Cat details) to the producer and watching it appear in the consumer logs.

Why This Matters for Developers

For Java Developers and Backend Architects, mastering object-based streaming is essential for building Event-Driven Architectures. We show you how to use Spring Kafka's built-in support for JSON Serialization, removing the need for manual byte array conversions. This guide provides the practical technical clarity needed to scale your Microservices efficiently.

Clear Logic, Practical Results

See the code in action across two Eclipse instances, from zookeeper startup to live log monitoring. This tutorial gives you a ready-to-use template for handling any domain object in your Kafka cluster. Join us at Ram N Java and elevate your Spring Boot and Kafka expertise today.

📥 Start Your Project!

Watch the full video to see the step-by-step implementation and REST testing. Subscribe to Ram N Java for more high-quality tech guides and simplified backend tutorials!