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CacheTrait.php 2.5 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\Contracts\Cache;
  11. use Psr\Cache\CacheItemPoolInterface;
  12. use Psr\Cache\InvalidArgumentException;
  13. use Psr\Log\LoggerInterface;
  14. // Help opcache.preload discover always-needed symbols
  15. class_exists(InvalidArgumentException::class);
  16. /**
  17. * An implementation of CacheInterface for PSR-6 CacheItemPoolInterface classes.
  18. *
  19. * @author Nicolas Grekas <p@tchwork.com>
  20. */
  21. trait CacheTrait
  22. {
  23. /**
  24. * {@inheritdoc}
  25. *
  26. * @return mixed
  27. */
  28. public function get(string $key, callable $callback, float $beta = null, array &$metadata = null)
  29. {
  30. return $this->doGet($this, $key, $callback, $beta, $metadata);
  31. }
  32. /**
  33. * {@inheritdoc}
  34. */
  35. public function delete(string $key): bool
  36. {
  37. return $this->deleteItem($key);
  38. }
  39. private function doGet(CacheItemPoolInterface $pool, string $key, callable $callback, ?float $beta, array &$metadata = null, LoggerInterface $logger = null)
  40. {
  41. if (0 > $beta = $beta ?? 1.0) {
  42. throw new class(sprintf('Argument "$beta" provided to "%s::get()" must be a positive number, %f given.', static::class, $beta)) extends \InvalidArgumentException implements InvalidArgumentException { };
  43. }
  44. $item = $pool->getItem($key);
  45. $recompute = !$item->isHit() || \INF === $beta;
  46. $metadata = $item instanceof ItemInterface ? $item->getMetadata() : [];
  47. if (!$recompute && $metadata) {
  48. $expiry = $metadata[ItemInterface::METADATA_EXPIRY] ?? false;
  49. $ctime = $metadata[ItemInterface::METADATA_CTIME] ?? false;
  50. if ($recompute = $ctime && $expiry && $expiry <= ($now = microtime(true)) - $ctime / 1000 * $beta * log(random_int(1, \PHP_INT_MAX) / \PHP_INT_MAX)) {
  51. // force applying defaultLifetime to expiry
  52. $item->expiresAt(null);
  53. $logger && $logger->info('Item "{key}" elected for early recomputation {delta}s before its expiration', [
  54. 'key' => $key,
  55. 'delta' => sprintf('%.1f', $expiry - $now),
  56. ]);
  57. }
  58. }
  59. if ($recompute) {
  60. $save = true;
  61. $item->set($callback($item, $save));
  62. if ($save) {
  63. $pool->save($item);
  64. }
  65. }
  66. return $item->get();
  67. }
  68. }