vendor/doctrine/cache/lib/Doctrine/Common/Cache/PredisCache.php

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<?php

namespace Doctrine\Common\Cache;

use Predis\ClientInterface;

/**
 * Predis cache provider.
 *
 * @author othillo <othillo@othillo.nl>
 */
class PredisCache extends CacheProvider
{
    /**
     * @var ClientInterface
     */
    private $client;

    /**
     * @param ClientInterface $client
     *
     * @return void
     */
    public function __construct(ClientInterface $client)
    {
        $this->client = $client;
    }

    /**
     * {@inheritdoc}
     */
    protected function doFetch($id)
    {
        $result = $this->client->get($id);
        if (null === $result) {
            return false;
        }

        return unserialize($result);
    }

    /**
     * {@inheritdoc}
     */
    protected function doFetchMultiple(array $keys)
    {
        $fetchedItems = call_user_func_array(array($this->client, 'mget'), $keys);

        return array_map('unserialize', array_filter(array_combine($keys, $fetchedItems)));
    }

    /**
     * {@inheritdoc}
     */
    protected function doSaveMultiple(array $keysAndValues, $lifetime = 0)
    {
        if ($lifetime) {
            $success = true;

            // Keys have lifetime, use SETEX for each of them