class ConfigSnapshotSubscriber in Drupal 8

Create a snapshot when config is imported.

Hierarchy

• class \Drupal\Core\EventSubscriber\ConfigSnapshotSubscriber implements \Symfony\Component\EventDispatcher\EventSubscriberInterface

1 string reference to 'ConfigSnapshotSubscriber'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses ConfigSnapshotSubscriber

config_snapshot_subscriber in core/core.services.yml

Drupal\Core\EventSubscriber\ConfigSnapshotSubscriber

File

core/lib/Drupal/Core/EventSubscriber/ConfigSnapshotSubscriber.php, line 14

Namespace

Drupal\Core\EventSubscriber

class ConfigSnapshotSubscriber implements EventSubscriberInterface {

  /**
   * The configuration manager.
   *
   * @var \Drupal\Core\Config\ConfigManagerInterface
   */
  protected $configManager;

  /**
   * The source storage used to discover configuration changes.
   *
   * @var \Drupal\Core\Config\StorageInterface
   */
  protected $sourceStorage;

  /**
   * The snapshot storage used to write configuration changes.
   *
   * @var \Drupal\Core\Config\StorageInterface
   */
  protected $snapshotStorage;

  /**
   * Constructs the ConfigSnapshotSubscriber object.
   *
   * @param \Drupal\Core\Config\StorageInterface $source_storage
   *   The source storage used to discover configuration changes.
   * @param \Drupal\Core\Config\StorageInterface $snapshot_storage
   *   The snapshot storage used to write configuration changes.
   */
  public function __construct(ConfigManagerInterface $config_manager, StorageInterface $source_storage, StorageInterface $snapshot_storage) {
    $this->configManager = $config_manager;
    $this->sourceStorage = $source_storage;
    $this->snapshotStorage = $snapshot_storage;
  }

  /**
   * Creates a config snapshot.
   *
   * @param \Drupal\Core\Config\ConfigImporterEvent $event
   *   The Event to process.
   */
  public function onConfigImporterImport(ConfigImporterEvent $event) {
    $this->configManager
      ->createSnapshot($this->sourceStorage, $this->snapshotStorage);
  }

  /**
   * Registers the methods in this class that should be listeners.
   *
   * @return array
   *   An array of event listener definitions.
   */
  public static function getSubscribedEvents() {
    $events[ConfigEvents::IMPORT][] = [
      'onConfigImporterImport',
      40,
    ];
    return $events;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
ConfigSnapshotSubscriber::$configManager	protected	property	The configuration manager.
ConfigSnapshotSubscriber::$snapshotStorage	protected	property	The snapshot storage used to write configuration changes.
ConfigSnapshotSubscriber::$sourceStorage	protected	property	The source storage used to discover configuration changes.
ConfigSnapshotSubscriber::getSubscribedEvents	public static	function	Registers the methods in this class that should be listeners.
ConfigSnapshotSubscriber::onConfigImporterImport	public	function	Creates a config snapshot.
ConfigSnapshotSubscriber::__construct	public	function	Constructs the ConfigSnapshotSubscriber object.