DoubleEchoServer.java

package com.github.nettybook.ch0;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public class DoubleEchoServer {
	public static void main(String[] args) throws Exception  {
	    // TODO Oio를 쓰면 readCompl이 계속 호출됨.
		EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
             .channel(NioServerSocketChannel.class)
             .childHandler(new ChannelInitializer<SocketChannel>() {
                 @Override
                 public void initChannel(SocketChannel ch) {
                     ChannelPipeline p = ch.pipeline();
                     p.addLast(new FirstHandler());
                     p.addLast(new SecondHandler());
                 }
             });

            ChannelFuture f = b.bind(8888).sync();
            
            Integer linger = f.channel().config().getOption(ChannelOption.SO_LINGER);

            f.channel().closeFuture().sync();
        } finally {
            workerGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
	}
}