kafka-streams-repartition

Kafka Streams Repartition

This module demonstrates the following:

• The use of the Kafka Streams DSL, including repartition() and peek().
• Unit testing using Topology Test Driver.

In this module, records of type <String, KafkaUser> are streamed from a topic named USER_TOPIC. The following tasks are performed:

1. Repartition the records into a new topic named USER_TOPIC-repartition with 3 partitions.

Prerequisites

To compile and run this demo, you’ll need:

• Java 21
• Maven
• Docker

Running the Application

To run the application manually:

• Start a Confluent Platform in a Docker environment.
• Produce records of type <String, KafkaUser> to the USER_TOPIC. You can use the producer user for this.
• Start the Kafka Streams application.

To run the application in Docker, use the following command:

docker-compose up -d

This command starts the following services in Docker:

• 1 Kafka broker (KRaft mode)
• 1 Schema Registry
• 1 Control Center
• 1 Producer User
• 1 Kafka Streams Repartition