package com.zhgd.netty.tcp.server;

import com.zhgd.netty.tcp.handler.TcpNettyHandler;
import com.zhgd.netty.tcp.listener.BindListener;
import com.zhgd.netty.tcp.listener.CloseListener;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;

/**
 * @author chenws
 * @date 2020/03/17 15:45:35
 */
@Component
@Slf4j
public class TcpNettyServer {
    @Autowired
    private TcpNettyHandler tcpNettyHandler;

    @Value("${high_formwork.netty.port:15333}")
    int port;

    @PostConstruct
    private void startTcpServer() {
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup(6);
        try {
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 1024)
                    .childOption(ChannelOption.SO_KEEPALIVE, true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            //添加自定义处理器
                            socketChannel.pipeline()
                                    //.addLast(new StringEncoder(StandardCharsets.UTF_8))
                                    //.addLast(new StringDecoder(Charset.forName("GBK")))
                                    .addLast(tcpNettyHandler);
                        }
                    });
            //监听器，当服务绑定成功后执行
            ChannelFuture channelFuture = serverBootstrap.bind(port).addListener(new BindListener());
            //监听器，当停止服务后执行。
            channelFuture.channel().closeFuture().addListener(new CloseListener());
        } catch (Exception e) {
            log.error("err：", e);
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

}