Phraseanet/lib/Alchemy/Phrasea/Cache/RedisCache.php

<?php

/*
 * This file is part of Phraseanet
 *
 * (c) 2005-2012 Alchemy
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Alchemy\Phrasea\Cache;

use Doctrine\Common\Cache\CacheProvider;

/**
 *
 * @license     http://opensource.org/licenses/gpl-3.0 GPLv3
 * @link        www.phraseanet.com
 */
class RedisCache extends CacheProvider
{
    /**
     * @var \Redis
     */
    private $_redis;

    /**
     * Sets the redis instance to use.
     *
     * @param Redis $memcache
     */
    public function setRedis(\Redis $redis)
    {
        $this->_redis = $redis;
    }

    /**
     * Gets the memcache instance used by the cache.
     *
     * @return Memcache
     */
    public function getRedis()
    {
        return $this->_redis;
    }

    /**
     * {@inheritdoc}
     */
    protected function doFetch($id)
    {
        return $this->_redis->get($id);
    }

    /**
     * {@inheritdoc}
     */
    protected function doContains($id)
    {
        return (bool) $this->_redis->get($id);
    }

    /**
     * {@inheritdoc}
     */
    protected function doSave($id, $data, $lifeTime = 0)
    {
        if (0 === $lifeTime) {
            return $this->_redis->set($id, $data);
        } else {
            return $this->_redis->setex($id, $lifeTime, $data);
        }
    }

    /**
     * {@inheritdoc}
     */
    protected function doDelete($id)
    {
        return $this->_redis->delete($id);
    }

    /**
     * {@inheritdoc}
     */
    protected function doFlush()
    {
        return $this->_redis->flushAll();
    }

    /**
     * {@inheritdoc}
     */
    protected function doGetStats()
    {
        return $this->_redis->info();
    }

    public function isServer()
    {
        return true;
    }

    public function get($key)
    {
        if ( ! $this->contains($key)) {
            throw new Exception('Unable to retrieve the value');
        }

        return $this->fetch($key);
    }

    public function deleteMulti(array $array_keys)
    {
        foreach ($array_keys as $id) {
            $this->delete($id);
        }

        return $this;
    }
}