Transactional Outbox Pattern

Step through how the outbox pattern handles a real order placement — including what happens when the broker fails.

Your service

Handles the request

Database

orders + outbox tables

✓ committed

Message relay

Polls outbox

Transaction log

— awaiting action —

Outbox table

— empty —

Message broker

Kafka / RabbitMQ

— no messages —

Consumer service

Inventory / Email / etc.

Waiting…

Event log

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