search_api-8.x-1.15/src/Datasource/DatasourcePluginManager.php

<?php

namespace Drupal\search_api\Datasource;

use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\search_api\Event\SearchApiEvents;
use Drupal\search_api\SearchApiPluginManager;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;

/**
 * Manages datasource plugins.
 *
 * @see \Drupal\search_api\Annotation\SearchApiDatasource
 * @see \Drupal\search_api\Datasource\DatasourceInterface
 * @see \Drupal\search_api\Datasource\DatasourcePluginBase
 * @see plugin_api
 */
class DatasourcePluginManager extends SearchApiPluginManager {

  /**
   * Constructs a DatasourcePluginManager object.
   *
   * @param \Traversable $namespaces
   *   An object that implements \Traversable which contains the root paths
   *   keyed by the corresponding namespace to look for plugin implementations.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
   *   Cache backend instance to use.
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler.
   * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $eventDispatcher
   *   The event dispatcher.
   */
  public function __construct(\Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler, EventDispatcherInterface $eventDispatcher) {
    parent::__construct('Plugin/search_api/datasource', $namespaces, $module_handler, $eventDispatcher, 'Drupal\search_api\Datasource\DatasourceInterface', 'Drupal\search_api\Annotation\SearchApiDatasource');

    $this->setCacheBackend($cache_backend, 'search_api_datasources');
    $this->alterInfo('search_api_datasource_info');
    $this->alterEvent(SearchApiEvents::GATHERING_DATA_SOURCES);
  }

}