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Outboxer Wiki

1. Introduction
   Why Outboxer exists. Event-driven architecture + DDD + the outbox pattern.

2. Decoupling with Events
   How Outboxer::Message.queue helps aggregates emit events without tight coupling.

3. The Transactional Outbox Pattern
   Why queuing messages in the same transaction matters, and how Outboxer ensures reliability.

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Core Concepts

4. Domain-Driven Design in Rails
   Aggregates, value objects, invariants, and bounded contexts—explained with Rails code.

5. Working with Outboxer::Message
   How to queue, structure, and manage messages in your domain models.

6. Publishing Messages
   How Outboxer::Publisher.publish_messages works, and how to handle published events (e.g. with Sidekiq).

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Real-World Usage

7. Integrating with Your App
   Setup, configuration, and example scripts for real apps.

8. Modularising a Rails Monolith
   Using Outboxer + DDD to break up responsibilities across contexts.

9. Case Study: Accountify
   A real example of Outboxer + DDD in production—patterns, lessons, and benefits.

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Operations & Support

10. Monitoring & Web UI
    How to mount and use the Outboxer web interface for message visibility.

11. Testing Strategies
    How to test message queuing and delivery in a safe, fast way.

12. Troubleshooting & FAQ
    Common issues, message retry logic, race conditions, and gotchas.