kafka-streams-process-values

Kafka Streams Process Values

This module demonstrates the following:

• The usage of the Kafka Streams DSL, including processValues().
• Accessing and enriching records with metadata using the processor context.
• Unit testing with the Topology Test Driver.

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

1. Each record is processed using a custom processor that enriches the value with metadata such as the topic, partition, and offset information.
2. The processed records with enriched metadata are written to a new topic named PERSON_PROCESS_VALUES_TOPIC.

Requirements

To compile and run this demo, you will need the following:

• Java 21
• Maven
• Docker

Running the Application

To run the application manually, please follow the steps below:

• Start a Confluent Platform in a Docker environment.
• Produce records of type <String, KafkaPerson> to a topic named PERSON_TOPIC. You can use the producer person to do this.
• Start the Kafka Streams.

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

docker-compose up -d

This command will start the following services in Docker:

• 1 Zookeeper
• 1 Kafka broker
• 1 Schema registry
• 1 Control Center
• 1 producer person
• 1 Kafka Streams process values