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Introduction to services

A "service" (such as accessing the database, sending email, or translating user interface text) can be defined by a module or Drupal core. Defining a service means giving it a name and designating a default class to provide the service; ideally, there should also be an interface that defines the methods that may be called. Services are collected into the Dependency Injection Container, and can be overridden to use different classes or different instantiation by modules. See the Services and Dependency Injection Container topic for details.

Some services have tags, which are defined in the service definition. Tags are used to define a group of related services, or to specify some aspect of how the service behaves. See the Service Tags topic for more information.

See also

Services and Dependency Injection Container

Service Tags

File

core/core.api.php, line 912

Title File name Summary All service tags
Drupal\package_manager\PathLocator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\StagingDirDoesNotExist core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\TranslatableStringFactory core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\BaseRequirementsFulfilledValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\ComposerMinimumStabilityValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\ComposerPatchesValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\ComposerPluginsValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\ComposerValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\DiskSpaceValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\DuplicateInfoFileValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\EnabledExtensionsValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\EnvironmentSupportValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\LockFileValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\MultisiteValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\OverwriteExistingPackagesValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\PendingUpdatesValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\PhpExtensionsValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\PhpTufValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\RsyncValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\SandboxDatabaseUpdatesValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\SandboxDirectoryValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\SupportedReleaseValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\SymlinkValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager\Validator\WritableFileSystemValidator core/modules/package_manager/package_manager.services.yml
Drupal\package_manager_bypass\LoggingBeginner core/modules/package_manager/tests/modules/package_manager_bypass/package_manager_bypass.services.yml
Drupal\package_manager_bypass\LoggingCommitter core/modules/package_manager/tests/modules/package_manager_bypass/package_manager_bypass.services.yml
Drupal\package_manager_test_validation\TestExecutableFinder core/modules/package_manager/tests/modules/package_manager_test_validation/package_manager_test_validation.services.yml
Drupal\path\EventSubscriber\DefaultContentSubscriber core/modules/path/path.services.yml
Drupal\path_alias\AliasPathMatcher core/modules/path_alias/path_alias.services.yml
Drupal\performance_test\DatabaseEventEnabler core/modules/system/tests/modules/performance_test/performance_test.services.yml http_middleware
Drupal\performance_test\PerformanceDataCollector core/modules/system/tests/modules/performance_test/performance_test.services.yml event_subscriber, needs_destruction
Drupal\responsive_image\ResponsiveImageBuilder core/modules/responsive_image/responsive_image.services.yml
Drupal\services_defaults_test\TestInjection core/modules/system/tests/modules/services_defaults_test/services_defaults_test.services.yml
Drupal\services_defaults_test\TestInjection2 core/modules/system/tests/modules/services_defaults_test/services_defaults_test.services.yml zee.bang, bar.tag2
Drupal\services_defaults_test\TestPrivateService core/modules/system/tests/modules/services_defaults_test/services_defaults_test.services.yml
Drupal\services_defaults_test\TestService core/modules/system/tests/modules/services_defaults_test/services_defaults_test.services.yml
Drupal\system\Theme\SystemAdminThemePreprocess core/modules/system/system.services.yml Drupal\system\Theme\SystemAdminThemePreprocess
Drupal\text\TextSummary core/modules/text/text.services.yml
Drupal\update\MailHandler core/modules/update/update.services.yml
Drupal\update\UpdateCalculator core/modules/update/update.services.yml
Drupal\user\AccountCancellation core/modules/user/user.services.yml
Drupal\user\LoginFinalizer core/modules/user/user.services.yml
Drupal\user\LogoutFinalizer core/modules/user/user.services.yml
Drupal\user\NotificationHandler core/modules/user/user.services.yml
Drupal\user\OneTimeAuthentication core/modules/user/user.services.yml
Drupal\user_route_alter_test\Routing\RouteSubscriber core/modules/serialization/tests/modules/user_route_alter_test/user_route_alter_test.services.yml
Drupal\views\ContextualLinksHelper core/modules/views/views.services.yml
Drupal\views\ViewsConfigUpdater core/modules/views/views.services.yml
Drupal\workspaces\EventSubscriber\WorkspaceSwitchSubscriber core/modules/workspaces/workspaces.services.yml
Drupal\workspaces\Provider\DefaultWorkspaceProvider core/modules/workspaces/workspaces.services.yml

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