Netty5+Jboss(Marshalling)完成对象序列化传输

  TCP在网络通讯的时候,通常在解决TCP粘包、拆包问题的时候,一般会用以下几种方式:

  1、 消息定长 例如每个报文的大小固定为200个字节,如果不够,空位补空格;

  2、 在消息尾部添加特殊字符进行分割,如添加回车;

  3、 将消息分为消息体和消息头,在消息头里面包含表示消息长度的字段,然后进行业务逻辑的处理。

  在Netty中我们主要利用对象的序列化进行对象的传输,虽然Java本身的序列化也能完成,但是Java序列化有很多问题,如后字节码流太大,以及序列化程度太低等。Jboss的序列化有程度较高、序列化后码流较小。这里利用Jboss的Marshalling测试一个简单的对象序列化。

  新建Maven工程,引入Netty5和Jboss的Marshalling。

  注:这里的Marshalling的版本,如果版本太低,可能会出现消息发送失败的问题。我在测试的时候起先用的是1.3.9,结果就是消息发送失败,打印异常信息发现是空指针的问题。

        <dependency>
            <groupId>io.netty</groupId>
            <artifactId>netty-all</artifactId>
            <version>5.0.0.Alpha2</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.marshalling</groupId>
            <artifactId>jboss-marshalling-serial</artifactId>
            <version>2.0.0.Beta2</version>
        </dependency>        

 

  1、服务端

package com.netty.parry.ende4;

import com.netty.parry.ende3.MarshallingCodeCFactory;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
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 Server {

    public void start(int port) throws Exception {
        // 配置NIO线程组
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workGroup = new NioEventLoopGroup();
        try {
            // 服务器辅助启动类配置
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_BACKLOG, 128)
            .option(ChannelOption.SO_RCVBUF, 32 * 1024)
            .option(ChannelOption.SO_SNDBUF, 32 * 1024)
            .option(ChannelOption.SO_KEEPALIVE, true)
            .childHandler(new ChildChannelHandler());
            // 绑定端口 同步等待绑定成功
            ChannelFuture f = b.bind(port).sync(); 
            // 等到服务端监听端口关闭
            f.channel().closeFuture().sync();
        } finally {
            // 优雅释放线程资源
            workGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

    /**
     * 网络事件处理器
     */
    private class ChildChannelHandler extends ChannelInitializer<SocketChannel> {
        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            // 添加Jboss的序列化,编解码工具
            ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
            ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
            // 处理网络IO
            ch.pipeline().addLast(new ServerHandler());
        }
    }

    public static void main(String[] args) throws Exception {
        new Server().start(8765);
    }
}

 

  2、服务端IO处理类

package com.netty.parry.ende4;

import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;

public class ServerHandler extends ChannelHandlerAdapter {
    
    // 用于获取客户端发送的信息
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // 用于获取客户端发来的数据信息
        Message body = (Message) msg;
        System.out.println("Server接受的客户端的信息 :" + body.toString());

        // 写数据给客户端
        Message response = new Message("欢迎您,与服务端连接成功");
        // 当服务端完成写操作后,关闭与客户端的连接
        ctx.writeAndFlush(response);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}

 

  3、客户端

package com.netty.parry.ende4;

import com.netty.parry.ende3.MarshallingCodeCFactory;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

public class Client {
    /**
     * 连接服务器
     * 
     * @param port
     * @param host
     * @throws Exception
     */
    public void connect(int port, String host) throws Exception {
        // 配置客户端NIO线程组
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            // 客户端辅助启动类 对客户端配置
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
            .option(ChannelOption.TCP_NODELAY, true)
                    .handler(new MyChannelHandler());
            // 异步链接服务器 同步等待链接成功
            ChannelFuture f = b.connect(host, port).sync();
            // 等待链接关闭
            f.channel().closeFuture().sync();

        } finally {
            group.shutdownGracefully();
            System.out.println("客户端优雅的释放了线程资源...");
        }

    }

    /**
     * 网络事件处理器
     */
    private class MyChannelHandler extends ChannelInitializer<SocketChannel> {
        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            System.out.println("MyChannelHandler");
            // 添加Jboss的序列化,编解码工具
            ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
            ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
            // 处理网络IO
            ch.pipeline().addLast(new ClientHandler());
        }
    }

    public static void main(String[] args) throws Exception {
        new Client().connect(8765, "127.0.0.1");
    }
}

 

  4、客户端IO处理类

package com.netty.parry.ende4;

import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.ReferenceCountUtil;

public class ClientHandler extends ChannelHandlerAdapter {

    // 客户端与服务端,连接成功的售后
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // 发送消息
        Message request1 = new Message("666");
        ctx.writeAndFlush(request1).addListener(new ChannelFutureListener() {
            
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    System.out.println("成功发送到服务端消息");
                } else {
                    System.out.println("失败服务端消息失败:"+future.cause().getMessage());
                    future.cause().printStackTrace();
                }
            }
        });
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        try {
            Message response = (Message) msg;
            System.out.println(response);
        } finally {
            ReferenceCountUtil.release(msg);
        }
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        cause.printStackTrace();
        ctx.close();
    }
}

 

  5、消息体

package com.netty.parry.ende4;

import java.io.Serializable;

public class Message implements Serializable{

    /**
     * 
     */
    private static final long serialVersionUID = -5296315429304117678L;
    
    private String body;

    public String getBody() {
        return body;
    }

    public void setBody(String body) {
        this.body = body;
    }

    public Message(String body) {
        super();
        this.body = body;
    }

    public Message() {
        super();
    }

    @Override
    public String toString() {
        return "Message [body=" + body + "]";
    }
}

 

  

posted @ 2017-12-19 10:38  星星满天  阅读(1925)  评论(0编辑  收藏  举报