About the Project

This is a finished Java implementation for the "Build Your Own Kafka" Challenge. This code implements functionality for all stages (and extensions) of the challenge as of 2025-02-13.

What can it do?

1. Respond to an APIVersions request with supported API calls (APIVersion, DescribeTopicPartitions, Fetch).
2. Respond to DescribeTopicPartitions and Fetch requests with real data ( Given a server.properties file it will parse the kafka metadata log file and topic data from log.dirs). Otherwise, it will happily respond with "I know nothing of these topics or their partitions."

Running Locally

You will need Java 23 (or later) and maven installed to run this code. The program can then be run with:

./your_program.sh /optional/path/to/server.properties

Test Run Video

A short video of the code being run in the codecrafters test environment:

codecrafters-kafka-java-test-run-av1.webm