340 lines
		
	
	
		
			9.4 KiB
		
	
	
	
		
			PHP
		
	
	
			
		
		
	
	
			340 lines
		
	
	
		
			9.4 KiB
		
	
	
	
		
			PHP
		
	
	
<?php
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/*
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 * This file is part of the Symfony package.
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 *
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 * (c) Fabien Potencier <fabien@symfony.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Symfony\Component\Cache\Adapter;
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use Psr\Cache\CacheItemInterface;
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use Psr\Cache\CacheItemPoolInterface;
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use Symfony\Component\Cache\CacheItem;
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use Symfony\Component\Cache\Exception\InvalidArgumentException;
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use Symfony\Component\Cache\PruneableInterface;
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use Symfony\Component\Cache\ResettableInterface;
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use Symfony\Component\Cache\Traits\ContractsTrait;
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use Symfony\Component\Cache\Traits\PhpArrayTrait;
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use Symfony\Contracts\Cache\CacheInterface;
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/**
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 * Caches items at warm up time using a PHP array that is stored in shared memory by OPCache since PHP 7.0.
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 * Warmed up items are read-only and run-time discovered items are cached using a fallback adapter.
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 *
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 * @author Titouan Galopin <galopintitouan@gmail.com>
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 * @author Nicolas Grekas <p@tchwork.com>
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 */
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class PhpArrayAdapter implements AdapterInterface, CacheInterface, PruneableInterface, ResettableInterface
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{
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    use ContractsTrait;
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    use PhpArrayTrait;
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    private $createCacheItem;
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    /**
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     * @param string           $file         The PHP file were values are cached
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     * @param AdapterInterface $fallbackPool A pool to fallback on when an item is not hit
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     */
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    public function __construct(string $file, AdapterInterface $fallbackPool)
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    {
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        $this->file = $file;
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        $this->pool = $fallbackPool;
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        $this->createCacheItem = \Closure::bind(
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            static function ($key, $value, $isHit) {
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                $item = new CacheItem();
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                $item->key = $key;
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                $item->value = $value;
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                $item->isHit = $isHit;
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                return $item;
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            },
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            null,
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            CacheItem::class
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        );
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    }
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    /**
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     * This adapter takes advantage of how PHP stores arrays in its latest versions.
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     *
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     * @param string                 $file         The PHP file were values are cached
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     * @param CacheItemPoolInterface $fallbackPool A pool to fallback on when an item is not hit
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     *
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     * @return CacheItemPoolInterface
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     */
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    public static function create($file, CacheItemPoolInterface $fallbackPool)
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    {
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        if (!$fallbackPool instanceof AdapterInterface) {
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            $fallbackPool = new ProxyAdapter($fallbackPool);
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        }
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        return new static($file, $fallbackPool);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function get(string $key, callable $callback, float $beta = null, array &$metadata = null)
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    {
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        if (!isset($this->keys[$key])) {
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            get_from_pool:
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            if ($this->pool instanceof CacheInterface) {
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                return $this->pool->get($key, $callback, $beta, $metadata);
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            }
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            return $this->doGet($this->pool, $key, $callback, $beta, $metadata);
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        }
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        $value = $this->values[$this->keys[$key]];
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        if ('N;' === $value) {
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            return null;
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        }
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        try {
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            if ($value instanceof \Closure) {
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                return $value();
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            }
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        } catch (\Throwable $e) {
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            unset($this->keys[$key]);
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            goto get_from_pool;
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        }
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        return $value;
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getItem($key)
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    {
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        if (!\is_string($key)) {
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            throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($key)));
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        }
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        if (!isset($this->keys[$key])) {
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            return $this->pool->getItem($key);
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        }
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        $value = $this->values[$this->keys[$key]];
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        $isHit = true;
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        if ('N;' === $value) {
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            $value = null;
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        } elseif ($value instanceof \Closure) {
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            try {
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                $value = $value();
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            } catch (\Throwable $e) {
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                $value = null;
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                $isHit = false;
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            }
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        }
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        $f = $this->createCacheItem;
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        return $f($key, $value, $isHit);
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    }
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    /**
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     * {@inheritdoc}
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     */
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    public function getItems(array $keys = [])
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    {
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        foreach ($keys as $key) {
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            if (!\is_string($key)) {
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                throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($key)));
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            }
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        }
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        return $this->generateItems($keys);
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function hasItem($key)
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    {
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        if (!\is_string($key)) {
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            throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($key)));
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        }
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        return isset($this->keys[$key]) || $this->pool->hasItem($key);
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function deleteItem($key)
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    {
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        if (!\is_string($key)) {
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            throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($key)));
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        }
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        return !isset($this->keys[$key]) && $this->pool->deleteItem($key);
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function deleteItems(array $keys)
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    {
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        $deleted = true;
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        $fallbackKeys = [];
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        foreach ($keys as $key) {
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            if (!\is_string($key)) {
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                throw new InvalidArgumentException(sprintf('Cache key must be string, "%s" given.', \is_object($key) ? \get_class($key) : \gettype($key)));
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            }
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            if (isset($this->keys[$key])) {
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                $deleted = false;
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            } else {
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                $fallbackKeys[] = $key;
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            }
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        }
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        if ($fallbackKeys) {
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            $deleted = $this->pool->deleteItems($fallbackKeys) && $deleted;
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        }
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        return $deleted;
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function save(CacheItemInterface $item)
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    {
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        return !isset($this->keys[$item->getKey()]) && $this->pool->save($item);
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function saveDeferred(CacheItemInterface $item)
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    {
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        if (null === $this->values) {
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            $this->initialize();
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        }
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        return !isset($this->keys[$item->getKey()]) && $this->pool->saveDeferred($item);
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    }
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    /**
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     * {@inheritdoc}
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     *
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     * @return bool
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     */
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    public function commit()
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    {
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        return $this->pool->commit();
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    }
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    private function generateItems(array $keys): \Generator
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    {
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        $f = $this->createCacheItem;
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        $fallbackKeys = [];
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        foreach ($keys as $key) {
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            if (isset($this->keys[$key])) {
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                $value = $this->values[$this->keys[$key]];
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                if ('N;' === $value) {
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                    yield $key => $f($key, null, true);
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                } elseif ($value instanceof \Closure) {
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                    try {
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                        yield $key => $f($key, $value(), true);
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                    } catch (\Throwable $e) {
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                        yield $key => $f($key, null, false);
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                    }
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                } else {
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                    yield $key => $f($key, $value, true);
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                }
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            } else {
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                $fallbackKeys[] = $key;
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            }
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        }
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        if ($fallbackKeys) {
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            yield from $this->pool->getItems($fallbackKeys);
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        }
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    }
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    /**
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     * @throws \ReflectionException When $class is not found and is required
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     *
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     * @internal to be removed in Symfony 5.0
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     */
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    public static function throwOnRequiredClass($class)
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    {
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        $e = new \ReflectionException("Class $class does not exist");
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        $trace = debug_backtrace();
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        $autoloadFrame = [
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            'function' => 'spl_autoload_call',
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            'args' => [$class],
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        ];
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        if (\PHP_VERSION_ID >= 80000 && isset($trace[1])) {
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            $callerFrame = $trace[1];
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        } elseif (false !== $i = array_search($autoloadFrame, $trace, true)) {
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            $callerFrame = $trace[++$i];
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        } else {
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            throw $e;
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        }
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        if (isset($callerFrame['function']) && !isset($callerFrame['class'])) {
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            switch ($callerFrame['function']) {
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                case 'get_class_methods':
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                case 'get_class_vars':
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                case 'get_parent_class':
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                case 'is_a':
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                case 'is_subclass_of':
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                case 'class_exists':
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                case 'class_implements':
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                case 'class_parents':
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                case 'trait_exists':
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                case 'defined':
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                case 'interface_exists':
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                case 'method_exists':
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                case 'property_exists':
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                case 'is_callable':
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                    return;
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            }
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        }
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        throw $e;
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    }
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}
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