--- /dev/null
+<?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;
+ }
+}