public void start(){

        if(this.isStarted.get()){
            return;
        }

        this.serverBootstrap
                .group(this.bossGroup, this.workGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_REUSEADDR, true)
                .option(ChannelOption.SO_BACKLOG, serverConfig.getSoBacklog())
                .childOption(ChannelOption.SO_KEEPALIVE, serverConfig.isSoKeepalive())
                .childOption(ChannelOption.TCP_NODELAY, serverConfig.isTcpNoDelay())
                .childOption(ChannelOption.SO_SNDBUF, serverConfig.getSendBufferSize())
                .childOption(ChannelOption.SO_RCVBUF, serverConfig.getReceiveBufferSize())
                .childHandler(new ChannelInitializer<NioSocketChannel>() {

                    @Override
                    protected void initChannel(NioSocketChannel ch) throws Exception {
                        initNettyChannel(ch);
                    }
                });

        ChannelFuture future;
        try {
            future = serverBootstrap.bind(serverConfig.getListenPort()).sync();
        } catch (Exception e) {
            logger.error("NettyRemotingServer bind fail {}, exit",e.getMessage(), e);
            throw new RuntimeException(String.format("NettyRemotingServer bind %s fail", serverConfig.getListenPort()));
        }
        if (future.isSuccess()) {
            logger.info("NettyRemotingServer bind success at port : {}", serverConfig.getListenPort());
        } else if (future.cause() != null) {
            throw new RuntimeException(String.format("NettyRemotingServer bind %s fail", serverConfig.getListenPort()), future.cause());
        } else {
            throw new RuntimeException(String.format("NettyRemotingServer bind %s fail", serverConfig.getListenPort()));
        }
        //
        isStarted.compareAndSet(false, true);
    }