netty9---使用編碼解碼器
阿新 • • 發佈:2018-05-20
-- 定義 work etc ddr RR ech channel urn
客戶端:
package com.client; import java.net.InetSocketAddress; import java.util.Scanner; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import org.jboss.netty.bootstrap.ClientBootstrap; import org.jboss.netty.channel.Channel; import org.jboss.netty.channel.ChannelFuture;import org.jboss.netty.channel.ChannelPipeline; import org.jboss.netty.channel.ChannelPipelineFactory; import org.jboss.netty.channel.Channels; import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory; import com.cn.codc.RequestEncoder; import com.cn.codc.ResponseDecoder; import com.cn.model.Request;import com.cn.module.fuben.request.FightRequest; /** * netty客戶端入門 */ public class Client { public static void main(String[] args) throws InterruptedException { //服務類 ClientBootstrap bootstrap = new ClientBootstrap(); //線程池 ExecutorService boss = Executors.newCachedThreadPool(); ExecutorService worker= Executors.newCachedThreadPool(); //socket工廠 bootstrap.setFactory(new NioClientSocketChannelFactory(boss, worker)); //管道工廠 bootstrap.setPipelineFactory(new ChannelPipelineFactory() { @Override public ChannelPipeline getPipeline() throws Exception { ChannelPipeline pipeline = Channels.pipeline(); pipeline.addLast("decoder", new ResponseDecoder());//Response解碼器 pipeline.addLast("encoder", new RequestEncoder());//Request編碼器 pipeline.addLast("hiHandler", new HiHandler());//通過ResponseDecoder解碼的是一個Response對象。 return pipeline; } }); //連接服務端 ChannelFuture connect = bootstrap.connect(new InetSocketAddress("127.0.0.1", 10101)); Channel channel = connect.sync().getChannel(); System.out.println("client start"); Scanner scanner = new Scanner(System.in); while(true){ System.out.println("請輸入"); int fubenId = Integer.parseInt(scanner.nextLine()); int count = Integer.parseInt(scanner.nextLine()); FightRequest fightRequest = new FightRequest(); fightRequest.setFubenId(fubenId); fightRequest.setCount(count); Request request = new Request(); request.setModule((short) 1);//請求第一個模塊的 request.setCmd((short) 1); request.setData(fightRequest.getBytes());//fightRequest是數據體data //發送請求 channel.write(request); } } }
package com.client; import org.jboss.netty.channel.ChannelHandlerContext; import org.jboss.netty.channel.ChannelStateEvent; import org.jboss.netty.channel.ExceptionEvent; import org.jboss.netty.channel.MessageEvent; import org.jboss.netty.channel.SimpleChannelHandler; import com.cn.model.Response; import com.cn.model.StateCode; import com.cn.module.fuben.request.FightRequest; import com.cn.module.fuben.response.FightResponse; /** * 消息接受處理類 */ public class HiHandler extends SimpleChannelHandler { /** * 接收消息 */ @Override public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception { Response message = (Response)e.getMessage();//解碼出來的之後是Response對象,然後進行業務處理 if(message.getModule() == 1){ if(message.getCmd() == 1){ FightResponse fightResponse = new FightResponse(); fightResponse.readFromBytes(message.getData()); System.out.println("gold:" + fightResponse.getGold()); }else if(message.getCmd() == 2){ } }else if (message.getModule() == 1){ } } /** * 捕獲異常 */ @Override public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception { System.out.println("exceptionCaught"); super.exceptionCaught(ctx, e); } /** * 新連接 */ @Override public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelConnected"); super.channelConnected(ctx, e); } /** * 必須是鏈接已經建立,關閉通道的時候才會觸發 */ @Override public void channelDisconnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelDisconnected"); super.channelDisconnected(ctx, e); } /** * channel關閉的時候觸發 */ @Override public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelClosed"); super.channelClosed(ctx, e); } }
服務端:
package com.server; import java.net.InetSocketAddress; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import org.jboss.netty.bootstrap.ServerBootstrap; import org.jboss.netty.channel.ChannelPipeline; import org.jboss.netty.channel.ChannelPipelineFactory; import org.jboss.netty.channel.Channels; import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory; import org.jboss.netty.handler.codec.string.StringDecoder; import org.jboss.netty.handler.codec.string.StringEncoder; import com.cn.codc.RequestDecoder; import com.cn.codc.ResponseEncoder; /** * netty服務端入門 */ public class Server { public static void main(String[] args) { //服務類 ServerBootstrap bootstrap = new ServerBootstrap(); //boss線程監聽端口,worker線程負責數據讀寫 ExecutorService boss = Executors.newCachedThreadPool(); ExecutorService worker = Executors.newCachedThreadPool(); //設置niosocket工廠 bootstrap.setFactory(new NioServerSocketChannelFactory(boss, worker)); //設置管道的工廠 bootstrap.setPipelineFactory(new ChannelPipelineFactory() { @Override public ChannelPipeline getPipeline() throws Exception { ChannelPipeline pipeline = Channels.pipeline(); pipeline.addLast("decoder", new RequestDecoder());//Request的解碼器 pipeline.addLast("encoder", new ResponseEncoder());//Response的編碼器 pipeline.addLast("helloHandler", new HelloHandler()); return pipeline; } }); bootstrap.bind(new InetSocketAddress(10101)); System.out.println("start!!!"); } }
package com.server; import org.jboss.netty.channel.ChannelHandlerContext; import org.jboss.netty.channel.ChannelStateEvent; import org.jboss.netty.channel.ExceptionEvent; import org.jboss.netty.channel.MessageEvent; import org.jboss.netty.channel.SimpleChannelHandler; import com.cn.model.Request; import com.cn.model.Response; import com.cn.model.StateCode; import com.cn.module.fuben.request.FightRequest; import com.cn.module.fuben.response.FightResponse; /** * 消息接受處理類 */ public class HelloHandler extends SimpleChannelHandler { /** * 接收消息 */ @Override public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception { Request message = (Request)e.getMessage(); if(message.getModule() == 1){ if(message.getCmd() == 1){ FightRequest fightRequest = new FightRequest(); fightRequest.readFromBytes(message.getData()); System.out.println("fubenId:" +fightRequest.getFubenId() + " " + "count:" + fightRequest.getCount()); //回寫數據 FightResponse fightResponse = new FightResponse(); fightResponse.setGold(9999); Response response = new Response(); response.setModule((short) 1); response.setCmd((short) 1); response.setStateCode(StateCode.SUCCESS); response.setData(fightResponse.getBytes()); ctx.getChannel().write(response); }else if(message.getCmd() == 2){ } }else if (message.getModule() == 1){ } } /** * 捕獲異常 */ @Override public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception { System.out.println("exceptionCaught"); super.exceptionCaught(ctx, e); } /** * 新連接 */ @Override public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelConnected"); super.channelConnected(ctx, e); } /** * 必須是鏈接已經建立,關閉通道的時候才會觸發 */ @Override public void channelDisconnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelDisconnected"); super.channelDisconnected(ctx, e); } /** * channel關閉的時候觸發 */ @Override public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception { System.out.println("channelClosed"); super.channelClosed(ctx, e); } }
網絡傳的是字節數據不是字符。
Netty之自定義數據包協議:
give me a coffee give me a tea (2條信息)
give me a coffeegive me a tea 粘包現象(2條信息粘在一起)
give me
a coffeegive me a tea 分包現象(第一條消息分開了,第一條後部分又粘到了第二條消息)
粘包和分包出現的原因是:沒有一個穩定數據結構(沒有確定一個請求傳遞哪些數據)
分割符:
give me a coffee|give me a tea|
give me a coffee|
give me a tea|
長度 + 數據:
16give me a coffee13give me a tea(讀取16個就封裝成一個請求,投遞到業務層去)
16give me a coffee
13give me a tea
netty9---使用編碼解碼器