owncloud / core

			$new = json_encode($new);

		}

		self::$cache->watch($this->getNamespace() . $key);

		if ($this->get($key) === $old) {

			$result = self::$cache->multi()

				->set($this->getNamespace() . $key, $new)

				->exec();

			return ($result === false) ? false : true;

		}

		self::$cache->unwatch();

		return false;

	}

	 */

	public function cad($key, $old) {

		self::$cache->watch($this->getNamespace() . $key);

		if ($this->get($key) === $old) {

			$result = self::$cache->multi()

				->del($this->getNamespace() . $key)

				->exec();

			return ($result === false) ? false : true;

		}

		self::$cache->unwatch();

		return false;

	}