<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\Common\Cache;
use Redis;
/**
* Redis cache provider.
*
* @link www.doctrine-project.org
* @since 2.2
* @author Osman Ungur <osmanungur@gmail.com>
*/
class RedisCache extends CacheProvider
{
/**
* @var Redis|null
*/
private $redis;
/**
* Sets the redis instance to use.
*
* @param Redis $redis
*
* @return void
*/
public function setRedis(Redis $redis)
{
$redis->setOption(Redis::OPT_SERIALIZER, $this->getSerializerValue());
$this->redis = $redis;
}
/**
* Gets the redis instance used by the cache.
*
* @return Redis|null
*/
public function getRedis()
{
return $this->redis;
}
/**
* {@inheritdoc}
*/
protected function doFetch($id)
{
return $this->redis->get($id);
}
/**
* {@inheritdoc}
*/
protected function doFetchMultiple(array $keys)
{
$fetchedItems = array_combine($keys, $this->redis->mget($keys));
// Redis mget returns false for keys that do not exist. So we need to filter those out unless it's the real data.
$foundItems = array();
foreach ($fetchedItems as $key => $value) {
if (false !== $value || $this->redis->exists($key)) {
$foundItems[$key] = $value;
}
}
return $foundItems;
}
/**
* {@inheritdoc}
*/
protected function doSaveMultiple(array $keysAndValues, $lifetime = 0)
{
if ($lifetime) {
$success = true;
// Keys have lifetime, use SETEX for each of them
foreach ($keysAndValues as $key => $value) {
if (!$this->redis->setex($key, $lifetime, $value)) {
$success = false;
}
}
return $success;
}
// No lifetime, use MSET
return (bool) $this->redis->mset($keysAndValues);
}
/**
* {@inheritdoc}
*/
protected function doContains($id)
{
return $this->redis->exists($id);
}
/**
* {@inheritdoc}
*/
protected function doSave($id, $data, $lifeTime = 0)
{
if ($lifeTime > 0) {
return $this->redis->setex($id, $lifeTime, $data);
}
return $this->redis->set($id, $data);
}
/**
* {@inheritdoc}
*/
protected function doDelete($id)
{
return $this->redis->delete($id) >= 0;
}
/**
* {@inheritdoc}
*/
protected function doFlush()
{
return $this->redis->flushDB();
}
/**
* {@inheritdoc}
*/
protected function doGetStats()
{
$info = $this->redis->info();
return array(
Cache::STATS_HITS => $info['keyspace_hits'],
Cache::STATS_MISSES => $info['keyspace_misses'],
Cache::STATS_UPTIME => $info['uptime_in_seconds'],
Cache::STATS_MEMORY_USAGE => $info['used_memory'],
Cache::STATS_MEMORY_AVAILABLE => false
);
}
/**
* Returns the serializer constant to use. If Redis is compiled with
* igbinary support, that is used. Otherwise the default PHP serializer is
* used.
*
* @return integer One of the Redis::SERIALIZER_* constants
*/
protected function getSerializerValue()
{
if (defined('HHVM_VERSION')) {
return Redis::SERIALIZER_PHP;
}
if (defined('Redis::SERIALIZER_IGBINARY') && extension_loaded('igbinary')) {
return Redis::SERIALIZER_IGBINARY;
}
return Redis::SERIALIZER_PHP;
}
}