services_examples.services.yml

services:

  # Very simple service that generates simple passwords.
  password_generator_simple:
    class: \Drupal\services_examples\PasswordGeneratorSimple

  ## -- Service Definition inheritance --

  # Abstract password generator who's service definition should be inherited
  # by other services.
  password_generator_abstract_base:
    abstract: true
    class: \Drupal\services_examples\PasswordGeneratorAbstractBase
    arguments:
      - '@messenger'
    calls:
      - ['setLogger', ['@logger.factory'] ]

  # Better password generated with cryptographically secure random numbers.
  # Inherits 'arguments' and 'calls' from parent service definition.
  password_generator_crypto_secure:
    class: \Drupal\services_examples\PasswordGeneratorCryptoSecure
    parent: password_generator_abstract_base

  # Better password generator that only uses unambiguous characters.
  # Inherits 'arguments' and 'calls' from parent service definition.
  password_generator_unambiguous:
    class: \Drupal\services_examples\PasswordGeneratorUnambiguous
    parent: password_generator_abstract_base

  # Example decorating a service.
  password_generator_unambiguous_decoration:
    class: \Drupal\services_examples\PasswordGeneratorUnambiguousDecoration
    public: false
    decorates: password_generator_unambiguous
    arguments:
      - '@password_generator_unambiguous_decoration.inner'