NettyServerBootstrap.java

package com.lyncc.netty.heartbeat2;

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;
import io.netty.handler.codec.serialization.ClassResolvers;
import io.netty.handler.codec.serialization.ObjectDecoder;
import io.netty.handler.codec.serialization.ObjectEncoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

import java.util.concurrent.TimeUnit;

public class NettyServerBootstrap {

    private int port;

    private SocketChannel socketChannel;

    public NettyServerBootstrap(int port) throws InterruptedException {
        this.port = port;
        bind();
    }

    private void bind() throws InterruptedException {

        EventLoopGroup boss = new NioEventLoopGroup();
        EventLoopGroup worker = new NioEventLoopGroup();
            ServerBootstrap bootstrap = new ServerBootstrap();
            // 通过NoDelay禁用Nagle,使消息立即发出去，不用等待到一定的数据量才发出去
            bootstrap.group(boss, worker).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 128)
                    .handler(new LoggingHandler(LogLevel.INFO)).option(ChannelOption.TCP_NODELAY, true)
                    .childOption(ChannelOption.SO_KEEPALIVE, true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {

                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ChannelPipeline p = socketChannel.pipeline();
                            p.addLast(new ObjectEncoder());
                            p.addLast(new ObjectDecoder(ClassResolvers.cacheDisabled(null)));
                            p.addLast(new NettyServerHandler());
                        }

                    });

            ChannelFuture f = bootstrap.bind(port).sync();
            if (f.isSuccess()) {
                System.out.println("server start---------------");
            }
    }
    
    public static void main(String []args) throws InterruptedException {
        new NettyServerBootstrap(18080);
        while (true){
            SocketChannel channel=(SocketChannel)NettyChannelMap.get("001");
            if(channel!=null){
                AskMsg askMsg=new AskMsg();
                channel.writeAndFlush(askMsg);
            }
            TimeUnit.SECONDS.sleep(5);
        }
    }

}