marsem-sam/build-your-own-kafka

SimpleKafka is a Kafka-like distributed messaging system. Producers and consumers use a client library to discover cluster metadata and send or fetch messages through brokers. Brokers coordinate broker and topic metadata through ZooKeeper, assign partition leadership, persist partition logs, and replicate messages. The protocol module encodes and decodes client and broker messages. The README also describes controller election, partitioning, replication, and leader failover; unsampled implementation details are represented within the broker subsystem rather than inferred as separate call paths.