dependency_injection_examples.services.yml

services:

  # Very basic example of a service that we can use.
  awesome_markup_creator:
    class: \Drupal\dependency_injection_examples\AwesomeMarkupCreator

  # Impractical example to illustrate what arguments are.
  my_service_with_arguments:
    class: \Drupal\dependency_injection_examples\ServiceWithArguments
    arguments:
      - 'hello'
      - 17

  # Example to illustrate that the same class can be used with different arguments.
  my_other_service_with_arguments:
    class: \Drupal\dependency_injection_examples\ServiceWithArguments
    arguments:
      - 'another example'
      - 'with different arguments'

  # Practical example of injecting other services as dependencies into our new
  # service using arguments.
  # AKA: "Wiring" services, specifically "Manual Wiring".
  my_service_with_wired_services:
    class: \Drupal\dependency_injection_examples\ServiceWithWiredServices
    arguments:
      - '@awesome_markup_creator'
      - '@my_service_with_arguments'
      - '@messenger'
      - '@logger.factory'

  # Example of injecting dependencies using a Setter on the service class.
  my_service_with_setter_injection:
    class: \Drupal\dependency_injection_examples\SetterInjectionExample
    arguments:
      - '@my_other_service_with_arguments'
    calls:
      - ['setAwesomeMarkupCreator', ['@awesome_markup_creator'] ]
      - ['setLogger', ['@logger.factory'] ]
      - ['setMessenger', ['@messenger'] ]