Posts tagged “messaging”

Tiny explainers grouped by topic. Spend less time Googling, more time building.

Events, Commands, and Sagas — coordinate cross‑service work without tight coupling

Commands say 'do X', events say 'X happened'. Use sagas (orchestration or choreography) for long‑running, cross‑service workflows with compensations, idempotency, and reliable messaging.

October 6th, 2025

devarchitecturemicroservices

Queues 101 — At‑Least‑Once (and Why “Exactly‑Once” Is a Myth)

Design for duplicates and reordering. Use idempotency, an inbox/outbox, and per‑key ordering to get effectively‑once processing in real systems.

September 19th, 2025

devarchitecturemessaging