NullAdapter.php 2.7 KB

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  1. <?php
  2. /*
  3. * This file is part of the Symfony package.
  4. *
  5. * (c) Fabien Potencier <fabien@symfony.com>
  6. *
  7. * For the full copyright and license information, please view the LICENSE
  8. * file that was distributed with this source code.
  9. */
  10. namespace Symfony\Component\Cache\Adapter;
  11. use Psr\Cache\CacheItemInterface;
  12. use Symfony\Component\Cache\CacheItem;
  13. use Symfony\Contracts\Cache\CacheInterface;
  14. /**
  15. * @author Titouan Galopin <galopintitouan@gmail.com>
  16. */
  17. class NullAdapter implements AdapterInterface, CacheInterface
  18. {
  19. private static $createCacheItem;
  20. public function __construct()
  21. {
  22. self::$createCacheItem ?? self::$createCacheItem = \Closure::bind(
  23. static function ($key) {
  24. $item = new CacheItem();
  25. $item->key = $key;
  26. $item->isHit = false;
  27. return $item;
  28. },
  29. null,
  30. CacheItem::class
  31. );
  32. }
  33. /**
  34. * {@inheritdoc}
  35. */
  36. public function get(string $key, callable $callback, float $beta = null, array &$metadata = null)
  37. {
  38. $save = true;
  39. return $callback((self::$createCacheItem)($key), $save);
  40. }
  41. /**
  42. * {@inheritdoc}
  43. */
  44. public function getItem($key)
  45. {
  46. return (self::$createCacheItem)($key);
  47. }
  48. /**
  49. * {@inheritdoc}
  50. */
  51. public function getItems(array $keys = [])
  52. {
  53. return $this->generateItems($keys);
  54. }
  55. /**
  56. * {@inheritdoc}
  57. *
  58. * @return bool
  59. */
  60. public function hasItem($key)
  61. {
  62. return false;
  63. }
  64. /**
  65. * {@inheritdoc}
  66. *
  67. * @return bool
  68. */
  69. public function clear(string $prefix = '')
  70. {
  71. return true;
  72. }
  73. /**
  74. * {@inheritdoc}
  75. *
  76. * @return bool
  77. */
  78. public function deleteItem($key)
  79. {
  80. return true;
  81. }
  82. /**
  83. * {@inheritdoc}
  84. *
  85. * @return bool
  86. */
  87. public function deleteItems(array $keys)
  88. {
  89. return true;
  90. }
  91. /**
  92. * {@inheritdoc}
  93. *
  94. * @return bool
  95. */
  96. public function save(CacheItemInterface $item)
  97. {
  98. return true;
  99. }
  100. /**
  101. * {@inheritdoc}
  102. *
  103. * @return bool
  104. */
  105. public function saveDeferred(CacheItemInterface $item)
  106. {
  107. return true;
  108. }
  109. /**
  110. * {@inheritdoc}
  111. *
  112. * @return bool
  113. */
  114. public function commit()
  115. {
  116. return true;
  117. }
  118. /**
  119. * {@inheritdoc}
  120. */
  121. public function delete(string $key): bool
  122. {
  123. return $this->deleteItem($key);
  124. }
  125. private function generateItems(array $keys): \Generator
  126. {
  127. $f = self::$createCacheItem;
  128. foreach ($keys as $key) {
  129. yield $key => $f($key);
  130. }
  131. }
  132. }