* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Contracts\Cache; use Psr\Cache\CacheItemPoolInterface; use Psr\Cache\InvalidArgumentException; use Psr\Log\LoggerInterface; // Help opcache.preload discover always-needed symbols class_exists(InvalidArgumentException::class); /** * An implementation of CacheInterface for PSR-6 CacheItemPoolInterface classes. * * @author Nicolas Grekas */ trait CacheTrait { /** * {@inheritdoc} * * @return mixed */ public function get(string $key, callable $callback, ?float $beta = null, ?array &$metadata = null) { return $this->doGet($this, $key, $callback, $beta, $metadata); } /** * {@inheritdoc} */ public function delete(string $key): bool { return $this->deleteItem($key); } private function doGet(CacheItemPoolInterface $pool, string $key, callable $callback, ?float $beta, ?array &$metadata = null, ?LoggerInterface $logger = null) { if (0 > $beta = $beta ?? 1.0) { throw new class(sprintf('Argument "$beta" provided to "%s::get()" must be a positive number, %f given.', static::class, $beta)) extends \InvalidArgumentException implements InvalidArgumentException { }; } $item = $pool->getItem($key); $recompute = !$item->isHit() || \INF === $beta; $metadata = $item instanceof ItemInterface ? $item->getMetadata() : []; if (!$recompute && $metadata) { $expiry = $metadata[ItemInterface::METADATA_EXPIRY] ?? false; $ctime = $metadata[ItemInterface::METADATA_CTIME] ?? false; if ($recompute = $ctime && $expiry && $expiry <= ($now = microtime(true)) - $ctime / 1000 * $beta * log(random_int(1, \PHP_INT_MAX) / \PHP_INT_MAX)) { // force applying defaultLifetime to expiry $item->expiresAt(null); $logger && $logger->info('Item "{key}" elected for early recomputation {delta}s before its expiration', [ 'key' => $key, 'delta' => sprintf('%.1f', $expiry - $now), ]); } } if ($recompute) { $save = true; $item->set($callback($item, $save)); if ($save) { $pool->save($item); } } return $item->get(); } }