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annotate core/lib/Drupal/Core/Cache/NullBackend.php @ 19:fa3358dc1485 tip
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author | Chris Cannam |
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date | Wed, 28 Aug 2019 13:14:47 +0100 |
parents | 4c8ae668cc8c |
children |
rev | line source |
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Chris@0 | 1 <?php |
Chris@0 | 2 |
Chris@0 | 3 namespace Drupal\Core\Cache; |
Chris@0 | 4 |
Chris@0 | 5 /** |
Chris@0 | 6 * Defines a stub cache implementation. |
Chris@0 | 7 * |
Chris@0 | 8 * The stub implementation is needed when database access is not yet available. |
Chris@0 | 9 * Because Drupal's caching system never requires that cached data be present, |
Chris@0 | 10 * these stub functions can short-circuit the process and sidestep the need for |
Chris@0 | 11 * any persistent storage. Using this cache implementation during normal |
Chris@0 | 12 * operations would have a negative impact on performance. |
Chris@0 | 13 * |
Chris@0 | 14 * This also can be used for testing purposes. |
Chris@0 | 15 * |
Chris@0 | 16 * @ingroup cache |
Chris@0 | 17 */ |
Chris@0 | 18 class NullBackend implements CacheBackendInterface { |
Chris@0 | 19 |
Chris@0 | 20 /** |
Chris@0 | 21 * Constructs a NullBackend object. |
Chris@0 | 22 * |
Chris@0 | 23 * @param string $bin |
Chris@0 | 24 * The cache bin for which the object is created. |
Chris@0 | 25 */ |
Chris@0 | 26 public function __construct($bin) {} |
Chris@0 | 27 |
Chris@0 | 28 /** |
Chris@0 | 29 * {@inheritdoc} |
Chris@0 | 30 */ |
Chris@0 | 31 public function get($cid, $allow_invalid = FALSE) { |
Chris@0 | 32 return FALSE; |
Chris@0 | 33 } |
Chris@0 | 34 |
Chris@0 | 35 /** |
Chris@0 | 36 * {@inheritdoc} |
Chris@0 | 37 */ |
Chris@0 | 38 public function getMultiple(&$cids, $allow_invalid = FALSE) { |
Chris@0 | 39 return []; |
Chris@0 | 40 } |
Chris@0 | 41 |
Chris@0 | 42 /** |
Chris@0 | 43 * {@inheritdoc} |
Chris@0 | 44 */ |
Chris@0 | 45 public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = []) {} |
Chris@0 | 46 |
Chris@0 | 47 /** |
Chris@0 | 48 * {@inheritdoc} |
Chris@0 | 49 */ |
Chris@0 | 50 public function setMultiple(array $items = []) {} |
Chris@0 | 51 |
Chris@0 | 52 /** |
Chris@0 | 53 * {@inheritdoc} |
Chris@0 | 54 */ |
Chris@0 | 55 public function delete($cid) {} |
Chris@0 | 56 |
Chris@0 | 57 /** |
Chris@0 | 58 * {@inheritdoc} |
Chris@0 | 59 */ |
Chris@0 | 60 public function deleteMultiple(array $cids) {} |
Chris@0 | 61 |
Chris@0 | 62 /** |
Chris@0 | 63 * {@inheritdoc} |
Chris@0 | 64 */ |
Chris@0 | 65 public function deleteAll() {} |
Chris@0 | 66 |
Chris@0 | 67 /** |
Chris@0 | 68 * {@inheritdoc} |
Chris@0 | 69 */ |
Chris@0 | 70 public function invalidate($cid) {} |
Chris@0 | 71 |
Chris@0 | 72 /** |
Chris@0 | 73 * {@inheritdoc} |
Chris@0 | 74 */ |
Chris@0 | 75 public function invalidateMultiple(array $cids) {} |
Chris@0 | 76 |
Chris@0 | 77 /** |
Chris@0 | 78 * {@inheritdoc} |
Chris@0 | 79 */ |
Chris@0 | 80 public function invalidateAll() {} |
Chris@0 | 81 |
Chris@0 | 82 /** |
Chris@0 | 83 * {@inheritdoc} |
Chris@0 | 84 */ |
Chris@0 | 85 public function garbageCollection() {} |
Chris@0 | 86 |
Chris@0 | 87 /** |
Chris@0 | 88 * {@inheritdoc} |
Chris@0 | 89 */ |
Chris@0 | 90 public function removeBin() {} |
Chris@0 | 91 |
Chris@0 | 92 } |