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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\Traits; use Psr\Cache\CacheItemInterface; use Symfony\Component\Cache\CacheItem; /** * @author Nicolas Grekas <p@tchwork.com> * * @internal */ trait AbstractAdapterTrait { use AbstractTrait; /** * @var \Closure needs to be set by class, signature is function(string <key>, mixed <value>, bool <isHit>) */ private $createCacheItem; /** * @var \Closure needs to be set by class, signature is function(array <deferred>, string <namespace>, array <&expiredIds>) */ private $mergeByLifetime; /** * {@inheritdoc} */ public function getItem($key) { if ($this->deferred) { $this->commit(); } $id = $this->getId($key); $f = $this->createCacheItem; $isHit = false; $value = null; try { foreach ($this->doFetch([$id]) as $value) { $isHit = true; } } catch (\Exception $e) { CacheItem::log($this->logger, 'Failed to fetch key "{key}": '.$e->getMessage(), ['key' => $key, 'exception' => $e]); } return $f($key, $value, $isHit); } /** * {@inheritdoc} */ public function getItems(array $keys = []) { if ($this->deferred) { $this->commit(); } $ids = []; foreach ($keys as $key) { $ids[] = $this->getId($key); } try { $items = $this->doFetch($ids); } catch (\Exception $e) { CacheItem::log($this->logger, 'Failed to fetch items: '.$e->getMessage(), ['keys' => $keys, 'exception' => $e]); $items = []; } $ids = array_combine($ids, $keys); return $this->generateItems($items, $ids); } /** * {@inheritdoc} */ public function save(CacheItemInterface $item) { if (!$item instanceof CacheItem) { return false; } $this->deferred[$item->getKey()] = $item; return $this->commit(); } /** * {@inheritdoc} */ public function saveDeferred(CacheItemInterface $item) { if (!$item instanceof CacheItem) { return false; } $this->deferred[$item->getKey()] = $item; return true; } public function __sleep() { throw new \BadMethodCallException('Cannot serialize '.__CLASS__); } public function __wakeup() { throw new \BadMethodCallException('Cannot unserialize '.__CLASS__); } public function __destruct() { if ($this->deferred) { $this->commit(); } } private function generateItems($items, &$keys) { $f = $this->createCacheItem; try { foreach ($items as $id => $value) { if (!isset($keys[$id])) { $id = key($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' => $e]); } foreach ($keys as $key) { yield $key => $f($key, null, false); } } }
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