CacheEngineRedis::setNotExists

public function setNotExists($key, $ttl, $value)
{
	$ttl = (int) $ttl;
	if (self::$engine->setnx($key, $value))
	{
		if ($ttl > 0)
		{
			self::$engine->expire($key, $ttl);
		}

		return true;
	}

	return false;
}