Event-Driven Architecture

Queues, publish/subscribe, and the log as a primitive. Delivery semantics, idempotency and ordering, then the architectures they make possible — and the debugging they cost you.

This module is 04.5 of the 5 in Messaging & Event Streams. It runs about 4 hours across 5 lessons, and closes with Saga — A five-step booking fails at step four. Unwind it correctly with no distributed transaction available.