services:
  # Subscriber to the config events, with dependencies injected.
  # Name of this service.
  my_config_events_subscriber_with_di:
    # Event subscriber class that will listen for the events.
    class: '\Drupal\custom_events\EventSubscriber\ConfigEventsSubscriberWithDI'
    # Inject services as "arguments"
    arguments:
      - '@messenger'
    # Tagged as an event_subscriber to register this subscriber with the event_dispatch service.
    tags:
      - { name: 'event_subscriber' }

  # Some other event subscriber with dependency injection.
  another_config_events_subscriber:
    class: '\Drupal\custom_events\EventSubscriber\AnotherConfigEventsSubscriber'
    arguments:
      - '@messenger'
    tags:
      - { name: 'event_subscriber' }

  # Subscriber to the event we dispatch in hook_user_login, with dependencies injected.
  custom_events_user_login_with_di:
    class: '\Drupal\custom_events\EventSubscriber\UserLoginSubscriberWithDI'
    arguments:
      - '@database'
      - '@date.formatter'
      - '@messenger'
    tags:
      - { name: 'event_subscriber' }