Exercises: Module 03 — Async Patterns¶

Instructions¶

Complete each exercise in order.

[!NOTE] Full exercises will be written when this module's README is expanded.

(Easy) Label each saga step and its compensating transaction for a given business flow
(Easy) Identify choreography vs orchestration pattern from a diagram
(Easy) Trace the outbox relay process step by step
(Medium) Implement a choreography saga for a hotel booking (reserve room → charge card → send confirmation)
(Medium) Design the state machine for an orchestration saga with at least 3 failure paths
(Medium) Implement the outbox relay with idempotency
(Hard) Debug a saga that fails to execute compensating transactions correctly
(Hard) Implement CQRS with a separate read model updated via events
(Expert) Design an event-sourced aggregate with snapshot optimization for a bank account