post://event-driven-architecture-kafka-contracts

Event-Driven Architecture: Kafka Topics, Contracts, and Replays

author: Swadhin Biswas • • read: 1 min
System DesignData Engineering
Event-Driven Architecture: Kafka Topics, Contracts, and Replays

Event-Driven Architecture

Event schemas are APIs. Version them carefully.

Sequence

sequenceDiagram
  participant Producer
  participant Kafka
  participant Consumer
  Producer->>Kafka: publish event v2
  Kafka-->>Consumer: deliver by partition
  Consumer->>Consumer: idempotent process

Always include event ID and processing idempotency keys.