Netty(九) Netty会话清除
netty学习目录
一、Netty(一) NIO例子
二、Netty(二) netty服务端
三、Netty(三) Netty客户端+服务端
四、Netty(四) 简化版Netty源码
五、Netty(五)Netty5.x服务端
六、Netty(六) Netty Http 服务器例子
七、Netty(七) Netty服务端+客户端代码
八、Netty(八) Netty多客户端连接例子
九、Netty(九) Netty会话清除
十、Netty(十) Netty自定义编码器解码器
package com.zqw.netty5x.heart;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import io.netty.handler.timeout.IdleStateHandler;
public class Server {
public static void main(String[] args) {
ServerBootstrap bootstrap = new ServerBootstrap();
EventLoopGroup boss = new NioEventLoopGroup();
EventLoopGroup worker = new NioEventLoopGroup();
try{
bootstrap.group(boss, worker);
bootstrap.channel(NioServerSocketChannel.class);
bootstrap.childHandler(new ChannelInitializer<Channel>() {
@Override
protected void initChannel(Channel ch) throws Exception {
ch.pipeline().addLast(new StringEncoder());
ch.pipeline().addLast(new StringDecoder());
ch.pipeline().addLast(new IdleStateHandler(5,5,10));
ch.pipeline().addLast(new ServerHandler());
}
});
bootstrap.option(ChannelOption.SO_BACKLOG,1024);
bootstrap.childOption(ChannelOption.TCP_NODELAY, true);
bootstrap.childOption(ChannelOption.SO_KEEPALIVE, true);
ChannelFuture future = bootstrap.bind(7777);
System.out.println("服务启动!");
future.channel().closeFuture().sync();
}catch (Exception e){
e.printStackTrace();
}finally {
boss.shutdownGracefully();
worker.shutdownGracefully();
}
}
}
package com.zqw.netty5x.heart;
import io.netty.channel.*;
import io.netty.handler.timeout.IdleState;
import io.netty.handler.timeout.IdleStateEvent;
import io.netty.util.concurrent.EventExecutorGroup;
public class ServerHandler extends SimpleChannelInboundHandler<String> {
@Override
protected void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
System.out.println(msg);
ctx.writeAndFlush("回话");
}
@Override
public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
if(evt instanceof IdleStateEvent){
IdleStateEvent event = (IdleStateEvent) evt;
if(event.state() == IdleState.ALL_IDLE){
ChannelFuture future = ctx.writeAndFlush("我要把你清除掉了");
future.addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future) throws Exception {
future.channel().close();
}
});
return;
}
}
super.userEventTriggered(ctx, evt);
}
}
package com.zqw.netty5x.heart;
import com.zqw.netty5x.ClientHandler1;
import com.zqw.netty5x.MutiClient1;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.atomic.AtomicInteger;
public class MultiClient {
private Bootstrap bootstrap = new Bootstrap();
private List<Channel> channels = new ArrayList<>();
private AtomicInteger integer = new AtomicInteger();
public void init(int count){
EventLoopGroup worker = new NioEventLoopGroup();
bootstrap.group(worker);
bootstrap.channel(NioSocketChannel.class);
bootstrap.handler(new ChannelInitializer<io.netty.channel.Channel>() {
@Override
protected void initChannel(io.netty.channel.Channel ch) throws Exception {
ch.pipeline().addLast(new StringEncoder());
ch.pipeline().addLast(new StringDecoder());
ch.pipeline().addLast(new ClientHandler1());
}
});
for (int i = 0; i < count ; i++) {
ChannelFuture future = bootstrap.connect("192.168.1.4",7777);
channels.add(future.channel());
}
}
public Channel next(){
return getChannel(0);
}
private Channel getChannel(int count) {
Channel channel = channels.get(Math.abs(integer.getAndIncrement() % channels.size()));
if(!channel.isActive()){
if(count >= channels.size()){
throw new RuntimeException("没有可用的channel");
}
reconnect(channel);
return getChannel(++count);
}
return channel;
}
private void reconnect(Channel channel) {
synchronized (channel){
System.out.println("重连。。。。。");
int index = channels.indexOf(channel);
channel = bootstrap.connect("192.168.1.4",7777).channel();
channels.set(index, channel);
}
}
public static void main(String[] args) {
MultiClient mutiClient = new MultiClient();
mutiClient.init(10);
Scanner scanner = new Scanner(System.in);
while(true){
System.out.println("请输入:");
String str = scanner.next();
try{
Channel channel = mutiClient.next();
channel.writeAndFlush(str);
}catch (Exception e){
e.printStackTrace();
}
}
}
}
package com.zqw.netty5x;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelHandlerInvoker;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.concurrent.EventExecutorGroup;
public class ClientHandler1 extends SimpleChannelInboundHandler<String> {
@Override
protected void messageReceived(ChannelHandlerContext ctx, String msg) throws Exception {
System.out.println(msg);
}
}