* This file is licensed under the Affero General Public License version 3 or * later. * See the COPYING-README file. */ namespace OC\Memcache; class Redis extends Cache { /** * @var \Redis $cache */ private static $cache = null; public function __construct($prefix = '') { parent::__construct($prefix); if (is_null(self::$cache)) { // TODO allow configuring a RedisArray, see https://github.com/nicolasff/phpredis/blob/master/arrays.markdown#redis-arrays self::$cache = new \Redis(); $config = \OC::$server->getSystemConfig()->getValue('redis', array()); if (isset($config['host'])) { $host = $config['host']; } else { $host = '127.0.0.1'; } if (isset($config['port'])) { $port = $config['port']; } else { $port = 6379; } if (isset($config['timeout'])) { $timeout = $config['timeout']; } else { $timeout = 0.0; // unlimited } self::$cache->connect( $host, $port, $timeout ); } } /** * entries in redis get namespaced to prevent collisions between ownCloud instances and users */ protected function getNameSpace() { return $this->prefix; } public function get($key) { $result = self::$cache->get($this->getNamespace() . $key); if ($result === false and ! self::$cache->exists($this->getNamespace() . $key)) { return null; } else { return $result; } } public function set($key, $value, $ttl = 0) { if ($ttl > 0) { return self::$cache->setex($this->getNamespace() . $key, $ttl, $value); } else { return self::$cache->set($this->getNamespace() . $key, $value); } } public function hasKey($key) { return self::$cache->exists($this->getNamespace() . $key); } public function remove($key) { if (self::$cache->delete($this->getNamespace() . $key)) { return true; } else { return false; } } public function clear($prefix = '') { $prefix = $this->getNamespace() . $prefix.'*'; $it = null; self::$cache->setOption(\Redis::OPT_SCAN, \Redis::SCAN_RETRY); while($keys = self::$cache->scan($it, $prefix)) { self::$cache->delete($keys); } return true; } static public function isAvailable() { return extension_loaded('redis'); } }