Chris@0: <?php
Chris@0: 
Chris@0: namespace Doctrine\Common\Cache;
Chris@0: 
Chris@0: use Predis\ClientInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Predis cache provider.
Chris@0:  *
Chris@0:  * @author othillo <othillo@othillo.nl>
Chris@0:  */
Chris@0: class PredisCache extends CacheProvider
Chris@0: {
Chris@0:     /**
Chris@0:      * @var ClientInterface
Chris@0:      */
Chris@0:     private $client;
Chris@0: 
Chris@0:     /**
Chris@0:      * @param ClientInterface $client
Chris@0:      *
Chris@0:      * @return void
Chris@0:      */
Chris@0:     public function __construct(ClientInterface $client)
Chris@0:     {
Chris@0:         $this->client = $client;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doFetch($id)
Chris@0:     {
Chris@0:         $result = $this->client->get($id);
Chris@0:         if (null === $result) {
Chris@0:             return false;
Chris@0:         }
Chris@0: 
Chris@0:         return unserialize($result);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doFetchMultiple(array $keys)
Chris@0:     {
Chris@0:         $fetchedItems = call_user_func_array(array($this->client, 'mget'), $keys);
Chris@0: 
Chris@0:         return array_map('unserialize', array_filter(array_combine($keys, $fetchedItems)));
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doSaveMultiple(array $keysAndValues, $lifetime = 0)
Chris@0:     {
Chris@0:         if ($lifetime) {
Chris@0:             $success = true;
Chris@0: 
Chris@0:             // Keys have lifetime, use SETEX for each of them
Chris@0:             foreach ($keysAndValues as $key => $value) {
Chris@0:                 $response = $this->client->setex($key, $lifetime, serialize($value));
Chris@0: 
Chris@0:                 if ((string) $response != 'OK') {
Chris@0:                     $success = false;
Chris@0:                 }
Chris@0:             }
Chris@0: 
Chris@0:             return $success;
Chris@0:         }
Chris@0: 
Chris@0:         // No lifetime, use MSET
Chris@0:         $response = $this->client->mset(array_map(function ($value) {
Chris@0:             return serialize($value);
Chris@0:         }, $keysAndValues));
Chris@0: 
Chris@0:         return (string) $response == 'OK';
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doContains($id)
Chris@0:     {
Chris@0:         return (bool) $this->client->exists($id);
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doSave($id, $data, $lifeTime = 0)
Chris@0:     {
Chris@0:         $data = serialize($data);
Chris@0:         if ($lifeTime > 0) {
Chris@0:             $response = $this->client->setex($id, $lifeTime, $data);
Chris@0:         } else {
Chris@0:             $response = $this->client->set($id, $data);
Chris@0:         }
Chris@0: 
Chris@0:         return $response === true || $response == 'OK';
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doDelete($id)
Chris@0:     {
Chris@0:         return $this->client->del($id) >= 0;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doFlush()
Chris@0:     {
Chris@0:         $response = $this->client->flushdb();
Chris@0: 
Chris@0:         return $response === true || $response == 'OK';
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     protected function doGetStats()
Chris@0:     {
Chris@0:         $info = $this->client->info();
Chris@0: 
Chris@0:         return array(
Chris@0:             Cache::STATS_HITS              => $info['Stats']['keyspace_hits'],
Chris@0:             Cache::STATS_MISSES            => $info['Stats']['keyspace_misses'],
Chris@0:             Cache::STATS_UPTIME            => $info['Server']['uptime_in_seconds'],
Chris@0:             Cache::STATS_MEMORY_USAGE      => $info['Memory']['used_memory'],
Chris@0:             Cache::STATS_MEMORY_AVAILABLE  => false
Chris@0:         );
Chris@0:     }
Chris@0: }