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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Cache\Simple; use Psr\SimpleCache\CacheInterface as Psr16CacheInterface; use Symfony\Component\Cache\Adapter\ChainAdapter; use Symfony\Component\Cache\Exception\InvalidArgumentException; use Symfony\Component\Cache\PruneableInterface; use Symfony\Component\Cache\ResettableInterface; use Symfony\Contracts\Cache\CacheInterface; use Symfony\Contracts\Service\ResetInterface; @trigger_error(sprintf('The "%s" class is deprecated since Symfony 4.3, use "%s" and type-hint for "%s" instead.', ChainCache::class, ChainAdapter::class, CacheInterface::class), E_USER_DEPRECATED); /** * Chains several caches together. * * Cached items are fetched from the first cache having them in its data store. * They are saved and deleted in all caches at once. * * @deprecated since Symfony 4.3, use ChainAdapter and type-hint for CacheInterface instead. */ class ChainCache implements Psr16CacheInterface, PruneableInterface, ResettableInterface { private $miss; private $caches = []; private $defaultLifetime; private $cacheCount; /** * @param Psr16CacheInterface[] $caches The ordered list of caches used to fetch cached items * @param int $defaultLifetime The lifetime of items propagated from lower caches to upper ones */ public function __construct(array $caches, int $defaultLifetime = 0) { if (!$caches) { throw new InvalidArgumentException('At least one cache must be specified.'); } foreach ($caches as $cache) { if (!$cache instanceof Psr16CacheInterface) { throw new InvalidArgumentException(sprintf('The class "%s" does not implement the "%s" interface.', \get_class($cache), Psr16CacheInterface::class)); } } $this->miss = new \stdClass(); $this->caches = array_values($caches); $this->cacheCount = \count($this->caches); $this->defaultLifetime = 0 < $defaultLifetime ? $defaultLifetime : null; } /** * {@inheritdoc} */ public function get($key, $default = null) { $miss = null !== $default && \is_object($default) ? $default : $this->miss; foreach ($this->caches as $i => $cache) { $value = $cache->get($key, $miss); if ($miss !== $value) { while (0 <= --$i) { $this->caches[$i]->set($key, $value, $this->defaultLifetime); } return $value; } } return $default; } /** * {@inheritdoc} */ public function getMultiple($keys, $default = null) { $miss = null !== $default && \is_object($default) ? $default : $this->miss; return $this->generateItems($this->caches[0]->getMultiple($keys, $miss), 0, $miss, $default); } private function generateItems($values, $cacheIndex, $miss, $default) { $missing = []; $nextCacheIndex = $cacheIndex + 1; $nextCache = isset($this->caches[$nextCacheIndex]) ? $this->caches[$nextCacheIndex] : null; foreach ($values as $k => $value) { if ($miss !== $value) { yield $k => $value; } elseif (!$nextCache) { yield $k => $default; } else { $missing[] = $k; } } if ($missing) { $cache = $this->caches[$cacheIndex]; $values = $this->generateItems($nextCache->getMultiple($missing, $miss), $nextCacheIndex, $miss, $default); foreach ($values as $k => $value) { if ($miss !== $value) { $cache->set($k, $value, $this->defaultLifetime); yield $k => $value; } else { yield $k => $default; } } } } /** * {@inheritdoc} */ public function has($key) { foreach ($this->caches as $cache) { if ($cache->has($key)) { return true; } } return false; } /** * {@inheritdoc} */ public function clear() { $cleared = true; $i = $this->cacheCount; while ($i--) { $cleared = $this->caches[$i]->clear() && $cleared; } return $cleared; } /** * {@inheritdoc} */ public function delete($key) { $deleted = true; $i = $this->cacheCount; while ($i--) { $deleted = $this->caches[$i]->delete($key) && $deleted; } return $deleted; } /** * {@inheritdoc} */ public function deleteMultiple($keys) { if ($keys instanceof \Traversable) { $keys = iterator_to_array($keys, false); } $deleted = true; $i = $this->cacheCount; while ($i--) { $deleted = $this->caches[$i]->deleteMultiple($keys) && $deleted; } return $deleted; } /** * {@inheritdoc} */ public function set($key, $value, $ttl = null) { $saved = true; $i = $this->cacheCount; while ($i--) { $saved = $this->caches[$i]->set($key, $value, $ttl) && $saved; } return $saved; } /** * {@inheritdoc} */ public function setMultiple($values, $ttl = null) { if ($values instanceof \Traversable) { $valuesIterator = $values; $values = function () use ($valuesIterator, &$values) { $generatedValues = []; foreach ($valuesIterator as $key => $value) { yield $key => $value; $generatedValues[$key] = $value; } $values = $generatedValues; }; $values = $values(); } $saved = true; $i = $this->cacheCount; while ($i--) { $saved = $this->caches[$i]->setMultiple($values, $ttl) && $saved; } return $saved; } /** * {@inheritdoc} */ public function prune() { $pruned = true; foreach ($this->caches as $cache) { if ($cache instanceof PruneableInterface) { $pruned = $cache->prune() && $pruned; } } return $pruned; } /** * {@inheritdoc} */ public function reset() { foreach ($this->caches as $cache) { if ($cache instanceof ResetInterface) { $cache->reset(); } } } }
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