class BackdropFakeCache | Documentation

Defines a stub cache implementation to be used during installation.

The stub implementation is needed when database access is not yet available. Because Backdrop's caching system never requires that cached data be present, these stub functions can short-circuit the process and sidestep the need for any persistent storage. Using this cache implementation during normal operations would have a negative impact on performance.

Hierarchy

class BackdropDatabaseCache implements BackdropCacheInterface
- class BackdropFakeCache implements BackdropCacheInterface

Expanded class hierarchy of BackdropFakeCache

2 string references to 'BackdropFakeCache'

backdrop_class_list in core/includes/bootstrap.classes.inc: Lists all the classes used by Backdrop core.
install_begin_request in core/includes/install.core.inc: Begins an installation request, modifying the installation state as needed.

File

core/includes/cache-install.inc, line 16: Provides a stub cache implementation to be used during installation.

View source

class BackdropFakeCache extends BackdropDatabaseCache implements BackdropCacheInterface {

  /**
   * Overrides BackdropDatabaseCache::get().
   */
  function get($cid) {
    return FALSE;
  }

  /**
   * Overrides BackdropDatabaseCache::getMultiple().
   */
  function getMultiple(array &$cids) {
    return array();
  }

  /**
   * Overrides BackdropDatabaseCache::set().
   */
  function set($cid, $data, $expire = CACHE_PERMANENT) {
  }

  /**
   * Overrides BackdropDatabaseCache::delete().
   */
  function delete($cid) {
    try {
      if (class_exists('Database')) {
        parent::delete($cid);
      }
    }
    catch (Exception $e) {
    }
  }

  /**
   * Overrides BackdropDatabaseCache::deleteMultiple().
   */
  function deleteMultiple(array $cids) {
    try {
      if (class_exists('Database')) {
        parent::deleteMultiple($cids);
      }
    }
    catch (Exception $e) {
    }
  }

  /**
   * Overrides BackdropDatabaseCache::deletePrefix().
   */
  function deletePrefix($cid) {
    try {
      if (class_exists('Database')) {
        parent::deletePrefix($cid);
      }
    }
    catch (Exception $e) {
    }
  }

  /**
   * Overrides BackdropDatabaseCache::flush().
   */
  function flush() {
    try {
      if (class_exists('Database')) {
        parent::flush();
      }
    }
    catch (Exception $e) {
    }
  }

  /**
   * Overrides BackdropDatabaseCache::garbageCollection().
   */
  function garbageCollection() {
    try {
      if (class_exists('Database')) {
        parent::garbageCollection();
      }
    }
    catch (Exception $e) {
    }
  }

  /**
   * Overrides BackdropDatabaseCache::isEmpty().
   */
  function isEmpty() {
    return TRUE;
  }
}

Members

Name	Modifiers	Type	Description
BackdropDatabaseCache::$bin	protected	property
BackdropDatabaseCache::prepareItem	protected	function	Prepares a cached item.
BackdropDatabaseCache::__construct		function	Constructs a new BackdropDatabaseCache object.
BackdropFakeCache::delete		function	Overrides BackdropDatabaseCache::delete(). Overrides BackdropDatabaseCache::delete
BackdropFakeCache::deleteMultiple		function	Overrides BackdropDatabaseCache::deleteMultiple(). Overrides BackdropDatabaseCache::deleteMultiple
BackdropFakeCache::deletePrefix		function	Overrides BackdropDatabaseCache::deletePrefix(). Overrides BackdropDatabaseCache::deletePrefix
BackdropFakeCache::flush		function	Overrides BackdropDatabaseCache::flush(). Overrides BackdropDatabaseCache::flush
BackdropFakeCache::garbageCollection		function	Overrides BackdropDatabaseCache::garbageCollection(). Overrides BackdropDatabaseCache::garbageCollection
BackdropFakeCache::get		function	Overrides BackdropDatabaseCache::get(). Overrides BackdropDatabaseCache::get
BackdropFakeCache::getMultiple		function	Overrides BackdropDatabaseCache::getMultiple(). Overrides BackdropDatabaseCache::getMultiple
BackdropFakeCache::isEmpty		function	Overrides BackdropDatabaseCache::isEmpty(). Overrides BackdropDatabaseCache::isEmpty
BackdropFakeCache::set		function	Overrides BackdropDatabaseCache::set(). Overrides BackdropDatabaseCache::set