Lumen's events provides a simple observer implementation, allowing you to subscribe and listen for events in your application. Event classes are typically stored in the app/Events directory, while their listeners are stored in app/Listeners.
In general, events in Lumen function exactly like they do in the full-stack Laravel framework, so please review the full Laravel documentation. Event broadcasting is even supported in Lumen, which allows you to listen for your server side events in your client-side JavaScript. However, there are a few minor differences which warrant discussion.
In Lumen, there are no generator commands to generate events and listeners for you, so you should simply copy the ExampleEvent or ExampleListener classes to define your own events and listeners. These example classes provide the basic structure of every event and listener.
Like the full Laravel framework, the EventServiceProvider included with your Lumen application provides a convenient place to register all event listeners. The listen property contains an array of all events (keys) and their listeners (values). Of course, you may add as many events to this array as your application requires:
/**
* The event listener mappings for the application.
*
* @var array
*/
protected $listen = [
'App\Events\ExampleEvent' => [
'App\Listeners\ExampleListener',
],
];You may use the event helper function or Event facade to fire events throughout your Lumen application. Again, these functions behave exactly like their full Laravel framework equivalent:
event(new ExampleEvent);
Event::dispatch(new ExampleEvent);