function EventsExampleSubscriber::getSubscribedEvents

File

modules/events_example/src/EventSubscriber/EventsExampleSubscriber.php, line 33

Class

EventsExampleSubscriber

Subscribe to IncidentEvents::NEW_REPORT events and react to new reports.

Namespace

Code

public static function getSubscribedEvents() : array {
    // Return an array of events that you want to subscribe to mapped to the
    // method on this class that you would like called whenever the event is
    // triggered. A single class can subscribe to any number of events. For
    // organization purposes it's a good idea to create a new class for each
    // unique task/concept rather than just creating a catch-all class for all
    // event subscriptions.
    //
    // See EventSubscriberInterface::getSubscribedEvents() for an explanation
    // of the array's format.
    //
    // The array key is the name of the event your want to subscribe to. Best
    // practice is to use the constant that represents the event as defined by
    // the code responsible for dispatching the event. This way, if, for
    // example, the string name of an event changes your code will continue to
    // work. You can get a list of event constants for all events triggered by
    // core here:
    // https://api.drupal.org/api/drupal/core%21core.api.php/group/events/8.2.x.
    //
    // Since any module can define and trigger new events there may be
    // additional events available in your application. Look for classes with
    // the special @Event docblock indicator to discover other events.
    //
    // For each event key define an array of arrays composed of the method names
    // to call and optional priorities. The method name here refers to a method
    // on this class to call whenever the event is triggered.
    $events[IncidentEvents::NEW_REPORT][] = [
        'notifyMario',
    ];
    // Subscribers can optionally set a priority. If more than one subscriber is
    // listening to an event when it is triggered they will be executed in order
    // of priority. If no priority is set the default is 0.
    $events[IncidentEvents::NEW_REPORT][] = [
        'notifyBatman',
        -100,
    ];
    // We'll set an event listener with a very low priority to catch incident
    // types not yet defined. In practice, this will be the 'cat' incident.
    $events[IncidentEvents::NEW_REPORT][] = [
        'notifyDefault',
        -255,
    ];
    return $events;
}