Drupalize.Me: Part 2: EventDispatcher in Drupal (Spotlight on Symfony in Drupal)

In Part 2 of our exploration of Symfony components in Drupal, we focus on the event dispatcher.

The event dispatcher is a tool that enables the application to communicate across objects by subscribing to and listening for events. It achieves this by creating a directory for various event types, and the corresponding registered listeners for each event type. When a specific type of event occurs, the code that has registered a listener for that event is invoked. If you're familiar with the Mediator and Observer design patterns you might recognize similarities here.