gateway worker 分离部署，gateway服务如何分配连接问题

// 使用轮询负载均衡确保连接均匀分布
        $gateway->router = function($worker_connections, $client_connection, $cmd, $buffer) {
            if (empty($worker_connections)) {
                return 0;
            }

            static $counter = 0;
            $worker_ids = array_keys($worker_connections);
            $index = $counter % count($worker_ids);
            $counter++;
            return $worker_connections[$worker_ids[$index]];
        };