101 lines
3.4 KiB
Java
101 lines
3.4 KiB
Java
package com.example.demo.Service;
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import io.netty.bootstrap.ServerBootstrap;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.*;
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import io.netty.channel.nio.NioEventLoopGroup;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.channel.socket.nio.NioServerSocketChannel;
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import io.netty.handler.timeout.IdleStateEvent;
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import io.netty.handler.timeout.IdleStateHandler;
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import lombok.extern.slf4j.Slf4j;
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import java.util.concurrent.TimeUnit;
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@Slf4j
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public class nettyServerHeart {
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private final int port;
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public nettyServerHeart(int port) {
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this.port = port;
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}
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public void start() throws InterruptedException {
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EventLoopGroup bossGroup = new NioEventLoopGroup(1);//线程
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EventLoopGroup workerGroup = new NioEventLoopGroup();//8
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try {
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ServerBootstrap b = new ServerBootstrap();
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b.group(bossGroup, workerGroup)
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.channel(NioServerSocketChannel.class)
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.option(ChannelOption.SO_BACKLOG,128)
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.childOption(ChannelOption.SO_KEEPALIVE,true)
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.childHandler(new ChannelInitializer<SocketChannel>() {
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@Override
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public void initChannel(SocketChannel ch) {
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ChannelPipeline p = ch.pipeline();
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log.info("客户端channel初始化");
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p.addLast(new IdleStateHandler(4,0,0, TimeUnit.SECONDS));
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p.addLast(new nettyServerHandler2());
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}
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});
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ChannelFuture f = b.bind(port).sync();//成功之后在执行
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log.info("服务启动成功！");
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f.addListener((ChannelFutureListener)future -> log.info("监听端口：{}",future.isSuccess()));
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f.channel().closeFuture().sync();
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} finally {
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bossGroup.shutdownGracefully();
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workerGroup.shutdownGracefully();
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}
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}
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public static void main(String[] args) throws InterruptedException {
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new nettyServerHeart(8888).start();
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}
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}
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@Slf4j
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class nettyServerHandler2 extends ChannelInboundHandlerAdapter {
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int i = 0;
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@Override
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public void channelRead(ChannelHandlerContext ctx, Object msg) {
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i++;
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ByteBuf in = (ByteBuf)msg;
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System.out.println("Received message: " +in.toString(io.netty.util.CharsetUtil.UTF_8));
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System.out.println();
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//ctx.channel().writeAndFlush(Unpooled.copiedBuffer("Hello from Netty Server",CharsetUtil.UTF_8));
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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cause.printStackTrace();
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ctx.close();
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}
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@Override
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public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
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if(evt instanceof IdleStateEvent){
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IdleStateEvent idleStateEvent = (IdleStateEvent)evt;
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switch (idleStateEvent.state()){
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case ALL_IDLE:
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log.error("读写都空闲");
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break;
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case READER_IDLE:
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log.error("读空闲");
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break;
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case WRITER_IDLE:
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log.error("写空闲");
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break;
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default:
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System.out.println("default!");
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}
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}
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}
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}
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