vendor/symfony/cache/Traits/AbstractAdapterTrait.php line 195
<?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\Traits;use Psr\Cache\CacheItemInterface;use Psr\Log\LoggerAwareTrait;use Symfony\Component\Cache\CacheItem;use Symfony\Component\Cache\Exception\InvalidArgumentException;/*** @author Nicolas Grekas <p@tchwork.com>** @internal*/trait AbstractAdapterTrait{use LoggerAwareTrait;/*** needs to be set by class, signature is function(string <key>, mixed <value>, bool <isHit>).*/private static \Closure $createCacheItem;/*** needs to be set by class, signature is function(array <deferred>, string <namespace>, array <&expiredIds>).*/private static \Closure $mergeByLifetime;private string $namespace = '';private int $defaultLifetime;private string $namespaceVersion = '';private bool $versioningIsEnabled = false;private array $deferred = [];private array $ids = [];/*** @var int|null The maximum length to enforce for identifiers or null when no limit applies*/protected $maxIdLength;/*** Fetches several cache items.** @param array $ids The cache identifiers to fetch** @return array|\Traversable*/abstract protected function doFetch(array $ids): iterable;/*** Confirms if the cache contains specified cache item.** @param string $id The identifier for which to check existence*/abstract protected function doHave(string $id): bool;/*** Deletes all items in the pool.** @param string $namespace The prefix used for all identifiers managed by this pool*/abstract protected function doClear(string $namespace): bool;/*** Removes multiple items from the pool.** @param array $ids An array of identifiers that should be removed from the pool*/abstract protected function doDelete(array $ids): bool;/*** Persists several cache items immediately.** @param array $values The values to cache, indexed by their cache identifier* @param int $lifetime The lifetime of the cached values, 0 for persisting until manual cleaning** @return array|bool The identifiers that failed to be cached or a boolean stating if caching succeeded or not*/abstract protected function doSave(array $values, int $lifetime): array|bool;public function hasItem(mixed $key): bool{$id = $this->getId($key);if (isset($this->deferred[$key])) {$this->commit();}try {return $this->doHave($id);} catch (\Exception $e) {CacheItem::log($this->logger, 'Failed to check if key "{key}" is cached: '.$e->getMessage(), ['key' => $key, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);return false;}}public function clear(string $prefix = ''): bool{$this->deferred = [];if ($cleared = $this->versioningIsEnabled) {if ('' === $namespaceVersionToClear = $this->namespaceVersion) {foreach ($this->doFetch([static::NS_SEPARATOR.$this->namespace]) as $v) {$namespaceVersionToClear = $v;}}$namespaceToClear = $this->namespace.$namespaceVersionToClear;$namespaceVersion = self::formatNamespaceVersion(mt_rand());try {$e = $this->doSave([static::NS_SEPARATOR.$this->namespace => $namespaceVersion], 0);} catch (\Exception $e) {}if (true !== $e && [] !== $e) {$cleared = false;$message = 'Failed to save the new namespace'.($e instanceof \Exception ? ': '.$e->getMessage() : '.');CacheItem::log($this->logger, $message, ['exception' => $e instanceof \Exception ? $e : null, 'cache-adapter' => get_debug_type($this)]);} else {$this->namespaceVersion = $namespaceVersion;$this->ids = [];}} else {$namespaceToClear = $this->namespace.$prefix;}try {return $this->doClear($namespaceToClear) || $cleared;} catch (\Exception $e) {CacheItem::log($this->logger, 'Failed to clear the cache: '.$e->getMessage(), ['exception' => $e, 'cache-adapter' => get_debug_type($this)]);return false;}}public function deleteItem(mixed $key): bool{return $this->deleteItems([$key]);}public function deleteItems(array $keys): bool{$ids = [];foreach ($keys as $key) {$ids[$key] = $this->getId($key);unset($this->deferred[$key]);}try {if ($this->doDelete($ids)) {return true;}} catch (\Exception) {}$ok = true;// When bulk-delete failed, retry each item individuallyforeach ($ids as $key => $id) {try {$e = null;if ($this->doDelete([$id])) {continue;}} catch (\Exception $e) {}$message = 'Failed to delete key "{key}"'.($e instanceof \Exception ? ': '.$e->getMessage() : '.');CacheItem::log($this->logger, $message, ['key' => $key, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);$ok = false;}return $ok;}public function getItem(mixed $key): CacheItem{$id = $this->getId($key);if (isset($this->deferred[$key])) {$this->commit();}$isHit = false;$value = null;try {foreach ($this->doFetch([$id]) as $value) {$isHit = true;}return (self::$createCacheItem)($key, $value, $isHit);} catch (\Exception $e) {CacheItem::log($this->logger, 'Failed to fetch key "{key}": '.$e->getMessage(), ['key' => $key, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);}return (self::$createCacheItem)($key, null, false);}public function getItems(array $keys = []): iterable{$ids = [];$commit = false;foreach ($keys as $key) {$ids[] = $this->getId($key);$commit = $commit || isset($this->deferred[$key]);}if ($commit) {$this->commit();}try {$items = $this->doFetch($ids);} catch (\Exception $e) {CacheItem::log($this->logger, 'Failed to fetch items: '.$e->getMessage(), ['keys' => $keys, 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);$items = [];}$ids = array_combine($ids, $keys);return $this->generateItems($items, $ids);}public function save(CacheItemInterface $item): bool{if (!$item instanceof CacheItem) {return false;}$this->deferred[$item->getKey()] = $item;return $this->commit();}public function saveDeferred(CacheItemInterface $item): bool{if (!$item instanceof CacheItem) {return false;}$this->deferred[$item->getKey()] = $item;return true;}/*** Enables/disables versioning of items.** When versioning is enabled, clearing the cache is atomic and doesn't require listing existing keys to proceed,* but old keys may need garbage collection and extra round-trips to the back-end are required.** Calling this method also clears the memoized namespace version and thus forces a resynchronization of it.** @return bool the previous state of versioning*/public function enableVersioning(bool $enable = true): bool{$wasEnabled = $this->versioningIsEnabled;$this->versioningIsEnabled = $enable;$this->namespaceVersion = '';$this->ids = [];return $wasEnabled;}public function reset(){if ($this->deferred) {$this->commit();}$this->namespaceVersion = '';$this->ids = [];}public function __sleep(): array{throw new \BadMethodCallException('Cannot serialize '.__CLASS__);}public function __wakeup(){throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);}public function __destruct(){if ($this->deferred) {$this->commit();}}private function generateItems(iterable $items, array &$keys): \Generator{$f = self::$createCacheItem;try {foreach ($items as $id => $value) {if (!isset($keys[$id])) {throw new InvalidArgumentException(sprintf('Could not match value id "%s" to keys "%s".', $id, implode('", "', $keys)));}$key = $keys[$id];unset($keys[$id]);yield $key => $f($key, $value, true);}} catch (\Exception $e) {CacheItem::log($this->logger, 'Failed to fetch items: '.$e->getMessage(), ['keys' => array_values($keys), 'exception' => $e, 'cache-adapter' => get_debug_type($this)]);}foreach ($keys as $key) {yield $key => $f($key, null, false);}}/*** @internal*/protected function getId(mixed $key){if ($this->versioningIsEnabled && '' === $this->namespaceVersion) {$this->ids = [];$this->namespaceVersion = '1'.static::NS_SEPARATOR;try {foreach ($this->doFetch([static::NS_SEPARATOR.$this->namespace]) as $v) {$this->namespaceVersion = $v;}$e = true;if ('1'.static::NS_SEPARATOR === $this->namespaceVersion) {$this->namespaceVersion = self::formatNamespaceVersion(time());$e = $this->doSave([static::NS_SEPARATOR.$this->namespace => $this->namespaceVersion], 0);}} catch (\Exception $e) {}if (true !== $e && [] !== $e) {$message = 'Failed to save the new namespace'.($e instanceof \Exception ? ': '.$e->getMessage() : '.');CacheItem::log($this->logger, $message, ['exception' => $e instanceof \Exception ? $e : null, 'cache-adapter' => get_debug_type($this)]);}}if (\is_string($key) && isset($this->ids[$key])) {return $this->namespace.$this->namespaceVersion.$this->ids[$key];}\assert('' !== CacheItem::validateKey($key));$this->ids[$key] = $key;if (\count($this->ids) > 1000) {$this->ids = \array_slice($this->ids, 500, null, true); // stop memory leak if there are many keys}if (null === $this->maxIdLength) {return $this->namespace.$this->namespaceVersion.$key;}if (\strlen($id = $this->namespace.$this->namespaceVersion.$key) > $this->maxIdLength) {// Use MD5 to favor speed over security, which is not an issue here$this->ids[$key] = $id = substr_replace(base64_encode(hash('md5', $key, true)), static::NS_SEPARATOR, -(\strlen($this->namespaceVersion) + 2));$id = $this->namespace.$this->namespaceVersion.$id;}return $id;}/*** @internal*/public static function handleUnserializeCallback(string $class){throw new \DomainException('Class not found: '.$class);}private static function formatNamespaceVersion(int $value): string{return strtr(substr_replace(base64_encode(pack('V', $value)), static::NS_SEPARATOR, 5), '/', '_');}}