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| <?php | |
| /** | |
| * @file | |
| * Contains \Drupal\Core\Cache\NullBackend. | |
| */ | |
| namespace Drupal\Core\Cache; | |
| /** | |
| * Defines a stub cache implementation. | |
| * | |
| * The stub implementation is needed when database access is not yet available. | |
| * Because Drupal'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. | |
| * | |
| * This also can be used for testing purposes. | |
| * | |
| * @ingroup cache | |
| */ | |
| class NullBackend implements CacheBackendInterface { | |
| /** | |
| * Constructs a NullBackend object. | |
| * | |
| * @param string $bin | |
| * The cache bin for which the object is created. | |
| */ | |
| public function __construct($bin) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function get($cid, $allow_invalid = FALSE) { | |
| return FALSE; | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function getMultiple(&$cids, $allow_invalid = FALSE) { | |
| return array(); | |
| } | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function setMultiple(array $items = array()) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function delete($cid) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function deleteMultiple(array $cids) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function deleteAll() {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function invalidate($cid) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function invalidateMultiple(array $cids) {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function invalidateAll() {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function garbageCollection() {} | |
| /** | |
| * {@inheritdoc} | |
| */ | |
| public function removeBin() {} | |
| } |