class Cache in Render cache 7.2

Helper methods for cache.

Hierarchy

• class \Drupal\Core\Cache\Cache
  • class \Drupal\render_cache\Cache\Cache

2 files declare their use of Cache

BaseController.php in src/RenderCache/Controller/BaseController.php

Contains \Drupal\render_cache\RenderCache\Controller\BaseController

CacheTest.php in tests/src/Cache/CacheTest.php

Contains \Drupal\render_cache\Tests\Cache\CacheTest

File

src/Cache/Cache.php, line 18

Contains \Drupal\render_cache\Cache\Cache.

Namespace

Drupal\render_cache\Cache

class Cache extends D8Cache {

  /**
   * Generates a hash from a query object, to be used as part of the cache key.
   *
   * This smart caching strategy saves Drupal from querying and rendering to
   * HTML when the underlying query is unchanged.
   *
   * Expensive queries should use the query builder to create the query and then
   * call this function. Executing the query and formatting results should
   * happen in a #pre_render callback.
   *
   * Note: This function was overridden to provide the D7 version of
   *       SelectQueryInterface.
   *
   * @param \SelectQueryInterface
   *   A select query object.
   *
   * @return string
   *   A hash of the query arguments.
   */
  public static function keyFromQuery(SelectQueryInterface $query) {
    $query
      ->preExecute();
    $keys = array(
      (string) $query,
      $query
        ->getArguments(),
    );
    return hash('sha256', serialize($keys));
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Cache::buildTags	public static	function	Build an array of cache tags from a given prefix and an array of suffixes.
Cache::deleteTags	public static	function	Deletes items from all bins with any of the specified tags.
Cache::getBins	public static	function	Gets all cache bin services.
Cache::invalidateTags	public static	function	Marks cache items from all bins with any of the specified tags as invalid.
Cache::keyFromQuery	public static	function	Generates a hash from a query object, to be used as part of the cache key.
Cache::mergeTags	public static	function	Merges arrays of cache tags and removes duplicates.
Cache::PERMANENT		constant	Indicates that the item should never be removed unless explicitly deleted.
Cache::validateTags	public static	function	Validates an array of cache tags.