Netty中Marshalling编解码应用

项目结构图:

SubscribeReq.java文件内容如下:

package com.shihuan.netty.codec.marshalling.pojo;

import java.io.Serializable;

public class SubscribeReq implements Serializable {

	private int subReqID;

    private String userName;

    private String productName;

    private String phoneNumber;

    private String address;

	public final int getSubReqID() {
		return subReqID;
	}

	public final void setSubReqID(int subReqID) {
		this.subReqID = subReqID;
	}

	public final String getUserName() {
		return userName;
	}

	public final void setUserName(String userName) {
		this.userName = userName;
	}

	public final String getProductName() {
		return productName;
	}

	public final void setProductName(String productName) {
		this.productName = productName;
	}

	public final String getPhoneNumber() {
		return phoneNumber;
	}

	public final void setPhoneNumber(String phoneNumber) {
		this.phoneNumber = phoneNumber;
	}

	public final String getAddress() {
		return address;
	}

	public final void setAddress(String address) {
		this.address = address;
	}

	/*
     * (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
	return "SubscribeReq [subReqID=" + subReqID + ", userName=" + userName
		+ ", productName=" + productName + ", phoneNumber="
		+ phoneNumber + ", address=" + address + "]";
    }
	
}

SubscribeResp.java文件内容如下:

package com.shihuan.netty.codec.marshalling.pojo;

import java.io.Serializable;

public class SubscribeResp implements Serializable {

	private int subReqID;

    private int respCode;

    private String desc;

	public final int getSubReqID() {
		return subReqID;
	}

	public final void setSubReqID(int subReqID) {
		this.subReqID = subReqID;
	}

	public final int getRespCode() {
		return respCode;
	}

	public final void setRespCode(int respCode) {
		this.respCode = respCode;
	}

	public final String getDesc() {
		return desc;
	}

	public final void setDesc(String desc) {
		this.desc = desc;
	}
	
	/*
     * (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
	return "SubscribeResp [subReqID=" + subReqID + ", respCode=" + respCode
		+ ", desc=" + desc + "]";
    }
	
}

MarshallingCodeCFactory.java文件内容如下:

package com.shihuan.netty.codec.marshalling.server;

import org.jboss.marshalling.MarshallerFactory;
import org.jboss.marshalling.Marshalling;
import org.jboss.marshalling.MarshallingConfiguration;

import io.netty.handler.codec.marshalling.DefaultMarshallerProvider;
import io.netty.handler.codec.marshalling.DefaultUnmarshallerProvider;
import io.netty.handler.codec.marshalling.MarshallerProvider;
import io.netty.handler.codec.marshalling.MarshallingDecoder;
import io.netty.handler.codec.marshalling.MarshallingEncoder;
import io.netty.handler.codec.marshalling.UnmarshallerProvider;

public final class MarshallingCodeCFactory {

	/**
	 * 创建Jboss Marshalling解码器MarshallingDecoder
	 */
	public static MarshallingDecoder buildMarshallingDecoder() {
		final MarshallerFactory marshallerFactory = Marshalling.getProvidedMarshallerFactory("serial");
		final MarshallingConfiguration configuration = new MarshallingConfiguration();
		configuration.setVersion(5);
		UnmarshallerProvider provider = new DefaultUnmarshallerProvider(marshallerFactory, configuration);
		MarshallingDecoder decoder = new MarshallingDecoder(provider, 1024);
		return decoder;
	}

	/**
	 * 创建Jboss Marshalling编码器MarshallingEncoder
	 */
	public static MarshallingEncoder buildMarshallingEncoder() {
		final MarshallerFactory marshallerFactory = Marshalling.getProvidedMarshallerFactory("serial");
		final MarshallingConfiguration configuration = new MarshallingConfiguration();
		configuration.setVersion(5);
		MarshallerProvider provider = new DefaultMarshallerProvider(marshallerFactory, configuration);
		MarshallingEncoder encoder = new MarshallingEncoder(provider);
		return encoder;
	}
	
}

SubReqServerHandler.java文件内容如下:

package com.shihuan.netty.codec.marshalling.server;

import com.shihuan.netty.codec.marshalling.pojo.SubscribeReq;
import com.shihuan.netty.codec.marshalling.pojo.SubscribeResp;

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

@Sharable
public class SubReqServerHandler extends ChannelHandlerAdapter {

	@Override
	public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
		SubscribeReq req = (SubscribeReq) msg;
		if ("Lilinfeng".equalsIgnoreCase(req.getUserName())) {
			System.out.println("Service accept client subscrib req : [" + req.toString() + "]");
			ctx.writeAndFlush(resp(req.getSubReqID()));
		}
	}

	private SubscribeResp resp(int subReqID) {
		SubscribeResp resp = new SubscribeResp();
		resp.setSubReqID(subReqID);
		resp.setRespCode(0);
		resp.setDesc("Netty book order succeed, 3 days later, sent to the designated address");
		return resp;
	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
		cause.printStackTrace();
		ctx.close();// 发生异常，关闭链路
	}
	
}

SubReqServer.java文件内容如下:

package com.shihuan.netty.codec.marshalling.server;

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;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;

public class SubReqServer {

	public void bind(int port) throws Exception {
		// 配置服务端的NIO线程组
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workerGroup = new NioEventLoopGroup();
		try {
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 100).handler(new LoggingHandler(LogLevel.INFO)).childHandler(new ChannelInitializer<SocketChannel>() {
				@Override
				public void initChannel(SocketChannel ch) {
					ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
					ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
					ch.pipeline().addLast(new SubReqServerHandler());
				}
			});

			// 绑定端口，同步等待成功
			ChannelFuture f = b.bind(port).sync();

			// 等待服务端监听端口关闭
			f.channel().closeFuture().sync();
		} finally {
			// 优雅退出，释放线程池资源
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}
	
	public static void main(String[] args) throws Exception {
		int port = 8080;
		if (args!=null && args.length>0) {
		    try {
		    	port = Integer.valueOf(args[0]);
		    } catch (NumberFormatException e) {
		    	// 采用默认值
		    }
		}
		new SubReqServer().bind(port);
	}
	
}

SubReqClientHandler.java文件内容如下:

package com.shihuan.netty.codec.marshalling.client;

import com.shihuan.netty.codec.marshalling.pojo.SubscribeReq;

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

public class SubReqClientHandler extends ChannelHandlerAdapter {

	/**
	 * Creates a client-side handler.
	 */
	public SubReqClientHandler() {
		
	}

	@Override
	public void channelActive(ChannelHandlerContext ctx) {
		for (int i=0; i<10; i++) {
			ctx.write(subReq(i));
		}
		ctx.flush();
	}

	private SubscribeReq subReq(int i) {
		SubscribeReq req = new SubscribeReq();
		req.setAddress("NanJing YuHuaTai");
		req.setPhoneNumber("136xxxxxxxxx");
		req.setProductName("Netty Book For Marshalling");
		req.setSubReqID(i);
		req.setUserName("Lilinfeng");
		return req;
	}

	@Override
	public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
		System.out.println("Receive server response : [" + msg + "]");
	}

	@Override
	public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
		ctx.flush();
	}

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

SubReqClient.java文件内容如下:

package com.shihuan.netty.codec.marshalling.client;

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;

import com.shihuan.netty.codec.marshalling.server.MarshallingCodeCFactory;

public class SubReqClient {

	public void connect(int port, String host) throws Exception {
		// 配置客户端NIO线程组
		EventLoopGroup group = new NioEventLoopGroup();
		try {
			Bootstrap b = new Bootstrap();
			b.group(group).channel(NioSocketChannel.class).option(ChannelOption.TCP_NODELAY, true).handler(new ChannelInitializer<SocketChannel>() {
				@Override
				public void initChannel(SocketChannel ch) throws Exception {
					ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingDecoder());
					ch.pipeline().addLast(MarshallingCodeCFactory.buildMarshallingEncoder());
					ch.pipeline().addLast(new SubReqClientHandler());
				}
			});

			// 发起异步连接操作
			ChannelFuture f = b.connect(host, port).sync();

			// 当代客户端链路关闭
			f.channel().closeFuture().sync();
		} finally {
			// 优雅退出，释放NIO线程组
			group.shutdownGracefully();
		}
	}
	
	public static void main(String[] args) throws Exception {
		int port = 8080;
		if (args!=null && args.length>0) {
		    try {
		    	port = Integer.valueOf(args[0]);
		    } catch (NumberFormatException e) {
		    	// 采用默认值
		    }
		}
		new SubReqClient().connect(port, "127.0.0.1");
	}
	
}

【注】:marshalling.rar文件是可运行的源代码。在Netty中通过应用Jboss Marshalling的编解码后既压缩了传输对象的体积大小又解决了传输过程中半包粘包的问题。

Netty中Marshalling编解码应用

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