interface SearchIndexingInterface in Drupal 8

Defines an optional interface for SearchPlugin objects using an index.

Plugins implementing this interface will have these methods invoked during search_cron() and via the search module administration form. Plugins not implementing this interface are assumed to be using their own methods for searching, not involving separate index tables.

The user interface for managing search pages displays the indexing status for search pages implementing this interface. It also allows users to configure default settings for indexing, and refers to the "default search index". If your search page plugin uses its own indexing mechanism instead of the default search index, or overrides the default indexing settings, you should make this clear on the settings page or other documentation for your plugin.

Multiple search pages can be created for each search plugin, so you will need to choose whether these search pages should share an index (in which case they must not use any search page-specific configuration while indexing) or they will have separate indexes (which will use additional server resources).

Hierarchy

• interface \Drupal\search\Plugin\SearchIndexingInterface

3 files declare their use of SearchIndexingInterface

HelpSearch.php in core/modules/help_topics/src/Plugin/Search/HelpSearch.php

NodeSearch.php in core/modules/node/src/Plugin/Search/NodeSearch.php

SearchPage.php in core/modules/search/src/Entity/SearchPage.php

File

core/modules/search/src/Plugin/SearchIndexingInterface.php, line 25

Namespace

Drupal\search\Plugin

interface SearchIndexingInterface {

  /**
   * Updates the search index for this plugin.
   *
   * This method is called every cron run if the plugin has been set as
   * an active search module on the Search settings page
   * (admin/config/search/pages). It allows your module to add items to the
   * built-in search index by calling the index() method on the search.index
   * service class, or to add them to your module's own indexing mechanism.
   *
   * When implementing this method, your module should index content items that
   * were modified or added since the last run. There is a time limit for cron,
   * so it is advisable to limit how many items you index per run using
   * config('search.settings')->get('index.cron_limit') or with your own
   * setting. And since the cron run could time out and abort in the middle of
   * your run, you should update any needed internal bookkeeping on when items
   * have last been indexed as you go rather than waiting to the end of
   * indexing.
   */
  public function updateIndex();

  /**
   * Clears the search index for this plugin.
   *
   * When a request is made to clear all items from the search index related to
   * this plugin, this method will be called. If this plugin uses the default
   * search index, this method can call clear($type) method on the search.index
   * service class to remove indexed items from the search database.
   *
   * @see \Drupal\search\SearchIndexInterface::clear()
   */
  public function indexClear();

  /**
   * Marks the search index for reindexing for this plugin.
   *
   * When a request is made to mark all items from the search index related to
   * this plugin for reindexing, this method will be called. If this plugin uses
   * the default search index, this method can call markForReindex($type) method
   * on the search.index service class to mark the items in the search database
   * for reindexing.
   *
   * @see \Drupal\search\SearchIndexInterface::markForReindex()
   */
  public function markForReindex();

  /**
   * Reports the status of indexing.
   *
   * The core search module only invokes this method on active module plugins.
   * Implementing modules do not need to check whether they are active when
   * calculating their return values.
   *
   * @return array
   *   An associative array with the key-value pairs:
   *   - remaining: The number of items left to index.
   *   - total: The total number of items to index.
   */
  public function indexStatus();

}