implementing-domain-events

Register domain events within your aggregates to maintain domain purity, ensuring the aggregate's core logic records the event without directly depending on external handler implementations or messaging infrastructure.

Implement an event bus for decoupled communication in Python by defining core contracts, establishing a package structure, and creating adapters for synchronous and asynchronous processing to route events to registered handlers.

Yes, you can use both synchronous and asynchronous handlers with domain events by configuring the respective adapters provided in the event bus architecture, allowing flexible processing based on your application's requirements.

The best way to trigger downstream processes after a new user is created is to publish a `UserCreatedEvent`, which asynchronously initiates tasks like sending email notifications and updating a search index without coupling core creation logic.

You should use an event-driven architecture for domain events to achieve decoupled communication between application parts, ensuring transactional safety and maintaining domain purity by isolating core logic from downstream side effects.