0040-laravel-event-driven-architecture

You can decouple Laravel side effects by dispatching typed domain events and handling them in single-responsibility listener classes. This event-driven architecture routes notifications, auditing, and indexing away from your main services instead of using direct calls.

To queue Laravel event listeners safely, implement ShouldQueue and use ShouldQueueAfterCommit or set $afterCommit = true. This guarantees the listener only runs after the database transaction successfully commits, preventing data consistency issues.

Use Laravel event subscribers when you need to group multiple event handling methods into a single class. Subscribers are ideal for managing related domain events, whereas standard listeners are better for single-responsibility side effects.

Yes, you can trigger Laravel events automatically from model lifecycle changes by using model observers. Observers hook into lifecycle events and dispatch your typed domain events, keeping lifecycle-driven workflows decoupled from direct service calls.

The best way to handle slow tasks in a Laravel order lifecycle is to run them asynchronously with queued listeners. By implementing ShouldQueue on your listener classes, you can process PDF generation, auditing, and indexing without blocking the main request.

To conditionally queue a Laravel event listener, implement ShouldQueue and define a shouldQueue() method on the listener class. This method allows you to add conditional logic that determines whether the listener should actually be pushed onto the queue.