public function onWorkerStart(\Swoole\Server $server, int $worker_id)
    {
        // STDOUT_LOG模式，不打印 worker stop 输出
        if ( getenv('STDOUT_LOG') ) {
            echo date('Y-m-d H:i:s') . " |\033[31m ...... http worker process start[id={$worker_id} pid={$server->worker_pid}] ......\033[0m \n";
        }

        // Add event Listener
        $this->add_event_listener('onWorkerStart');
    }