Method EchoServer

example/echoServerAsync.cc:9–22

{
public:
    EchoServer(EventLoop *loop, const InetAddress &addr, const std::string &name)
        : server_(loop, addr, name)
        , loop_(loop)
    {
        // 注册回调函数
        server_.setConnectionCallback(
            std::bind(&EchoServer::onConnection, this, std::placeholders::_1));
        
        server_.setMessageCallback(
            std::bind(&EchoServer::onMessage, this, std::placeholders::_1, std::placeholders::_2, std::placeholders::_3));

        // 设置合适的subloop线程数量
        // server_.setThreadNum(3);
    }

    void start()
    {