Netty UDT网络通信示例

netty 网络通信示例一 ：[url]http://donald-draper.iteye.com/blog/2383326[/url]
netty 网络通信示例二：[url]http://donald-draper.iteye.com/blog/2383328[/url]
netty 网络通信示例三：[url]http://donald-draper.iteye.com/blog/2383392[/url]
netty 网络通信示例四：[url]http://donald-draper.iteye.com/blog/2383472[/url]
Netty 构建HTTP服务器示例：[url]http://donald-draper.iteye.com/blog/2383527[/url]
前面的文章我们看了Netty tcp，http协议通信实例，大部分项目用Netty一般用TCP协议，很少用UDP协议，官方文档中，UDP协议的实例都很少，我们在实例可以看到一个UDT的实例包，UDT协议是基于UDP的数据传输协议（UDP-based Data Transfer Protocol，简称UDT），是一种互联网数据传输协议。UDT的主要目的是支持高速广域网上的海量数据传输，而互联网上的标准数据传输协议TCP在高带宽长距离网络上性能很差。 顾名思义，UDT建于UDP之上，并引入新的拥塞控制和数据可靠性控制机制。UDT是面向连接的双向的应用层协议。它同时支持可靠的数据流传输和部分可靠的数据报传输。 由于UDT完全在UDP上实现，它也可以应用在除了高速数据传输之外的其它应用领域，例如点到点技术（P2P），防火墙穿透，多媒体数据传输等等。
关于UDT协议，可以参见以下这个一些的文章：
UDT协议-基于UDP的可靠数据传输协议的实现分析(1)-准备工作:[url]http://jimmee.iteye.com/blog/2037451[/url]，以后再认真研究一下UDT协议。
在netty实例中，UDT实例有UDT Byte Stream（TCP-like byte streaming mode） ,UDT Message Flow（UDP-like message delivery mode）及相关的对等Peer通信，测试结果UDT Message Flow类型的实例存在bug, see #https://github.com/netty/netty/issues/6934. Netty官方显示UDT将被丢弃，不在维护。所以我们只看下UDT Byte Stream的实例及Peer通信：
[b]服务端：[/b]

package netty.main.udt.bytes;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.udt.UdtChannel;
import io.netty.channel.udt.nio.NioUdtProvider;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.concurrent.DefaultThreadFactory;
import netty.handler.udt.bytes.ByteEchoServerHandler;

import java.net.InetSocketAddress;
import java.util.concurrent.ThreadFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * UDT Byte Stream Server
 * use UDT in TCP-like byte streaming mode
 * @author donald
 * 2017年7月1日
 * 下午4:11:20
 */
public final class ByteEchoServer {
	private static final Logger log = LoggerFactory.getLogger(ByteEchoServer.class);
	public static final String ip = System.getProperty("host", "192.168.31.153");
    static final int port = Integer.parseInt(System.getProperty("port", "10020"));
    @SuppressWarnings("deprecation")
	public static void main(String[] args) throws Exception {
        final ThreadFactory acceptFactory = new DefaultThreadFactory("accept");
        final ThreadFactory connectFactory = new DefaultThreadFactory("connect");
        final NioEventLoopGroup acceptGroup = new NioEventLoopGroup(1, acceptFactory, NioUdtProvider.BYTE_PROVIDER);
        final NioEventLoopGroup connectGroup = new NioEventLoopGroup(1, connectFactory, NioUdtProvider.BYTE_PROVIDER);

        // Configure the server.
        try {
            final ServerBootstrap boot = new ServerBootstrap();
            boot.group(acceptGroup, connectGroup)
                    .channelFactory(NioUdtProvider.BYTE_ACCEPTOR)
                    .option(ChannelOption.SO_BACKLOG, 10)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new ChannelInitializer<UdtChannel>() {
                        @Override
                        public void initChannel(final UdtChannel ch)
                                throws Exception {
                            ch.pipeline().addLast(
                                    new LoggingHandler(LogLevel.INFO),
                                    new ByteEchoServerHandler());
                        }
                    });
            InetSocketAddress inetSocketAddress = new InetSocketAddress(ip,port);
            // Start the server.
            final ChannelFuture future = boot.bind(inetSocketAddress).sync();
            log.info("=========UDT Server is start=========");
            // Wait until the server socket is closed.
            future.channel().closeFuture().sync();
        } finally {
            // Shut down all event loops to terminate all threads.
            acceptGroup.shutdownGracefully();
            connectGroup.shutdownGracefully();
        }
    }
}

[b]服务端处理器：[/b]

package netty.handler.udt.bytes;

import io.netty.channel.ChannelHandler.Sharable;

import java.io.UnsupportedEncodingException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.udt.nio.NioUdtProvider;

/**
 * 
 * @author donald
 * 2017年7月1日
 * 下午4:53:46
 */
@Sharable
public class ByteEchoServerHandler extends ChannelInboundHandlerAdapter {
	private static final Logger log = LoggerFactory.getLogger(ByteEchoServerHandler.class);

	@SuppressWarnings("deprecation")
	@Override
	public void channelActive(final ChannelHandlerContext ctx) {
		 log.info("ECHO active " +
		 NioUdtProvider.socketUDT(ctx.channel()).toStringOptions());
	}

	@Override
	public void channelRead(final ChannelHandlerContext ctx, Object msg) {
		ByteBuf in = (ByteBuf)msg;
    	byte[] bytes = new byte[in.writerIndex()];
    	in.readBytes(bytes);
    	//针对堆buf，direct buf不支持
//    	byte[] bytes = in.array();
    	String message = null;
		try {
			message = new String(bytes,"UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
    	try{
    		log.info("===Server reciever message:" +message);
    	}
    	finally{
    		//如果msg为引用计数对象，在使用后注意释放，一般在通道handler中释放
//            ReferenceCountUtil.release(msg);
    	}
    	String ackMessage = "hello client ...";
    	in.clear();
    	try {
			in.writeBytes(ackMessage.getBytes("UTF-8"));
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
    	ctx.write(in);
	}

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

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

[b]客户端：[/b]

package netty.main.udt.bytes;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.udt.UdtChannel;
import io.netty.channel.udt.nio.NioUdtProvider;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.concurrent.DefaultThreadFactory;
import netty.handler.udt.bytes.ByteEchoClientHandler;

import java.net.InetSocketAddress;
import java.util.concurrent.ThreadFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * UDT Byte Stream Client
 * use UDT in TCP-like byte streaming mode
 * Sends one message when a connection is open and echoes back any received data
 * to the server. Simply put, the echo client initiates the ping-pong traffic
 * between the echo client and server by sending the first message to the
 * server.
 * @author donald
 * 2017年7月1日
 * 下午4:11:20
 */
public final class ByteEchoClient {
	private static final Logger log = LoggerFactory.getLogger(ByteEchoClient.class);
    public static final String ip = System.getProperty("host", "192.168.31.153");
    static final int port = Integer.parseInt(System.getProperty("port", "10020"));
    public static final int SIZE = Integer.parseInt(System.getProperty("size", "256"));

    @SuppressWarnings("deprecation")
	public static void main(String[] args) throws Exception {
        // Configure the client.
        final ThreadFactory connectFactory = new DefaultThreadFactory("connect");
        final NioEventLoopGroup connectGroup = new NioEventLoopGroup(1,
                connectFactory, NioUdtProvider.BYTE_PROVIDER);
        try {
            final Bootstrap boot = new Bootstrap();
            boot.group(connectGroup)
                    .channelFactory(NioUdtProvider.BYTE_CONNECTOR)
                    .handler(new ChannelInitializer<UdtChannel>() {
                        @Override
                        public void initChannel(final UdtChannel ch)
                                throws Exception {
                            ch.pipeline().addLast(
                                    new LoggingHandler(LogLevel.INFO),
                                    new ByteEchoClientHandler());
                        }
                    });
            InetSocketAddress inetSocketAddress = new InetSocketAddress(ip,port);
            // Start the client.
            final ChannelFuture f = boot.connect(inetSocketAddress).sync();
            log.info("=========UDT Client is start=========");
            // Wait until the connection is closed.
            f.channel().closeFuture().sync();
        } finally {
            // Shut down the event loop to terminate all threads.
            connectGroup.shutdownGracefully();
        }
    }
}

[b]客户端处理器：[/b]

package netty.handler.udt.bytes;

import java.io.UnsupportedEncodingException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.udt.nio.NioUdtProvider;
import netty.main.udt.bytes.ByteEchoClient;

/**
 * Handler implementation for the echo client. It initiates the ping-pong
 * traffic between the echo client and server by sending the first message to
 * the server on activation.
 * @author donald
 * 2017年7月1日
 * 下午4:53:59
 */
public class ByteEchoClientHandler extends SimpleChannelInboundHandler<ByteBuf> {
	private static final Logger log = LoggerFactory.getLogger(ByteEchoClientHandler.class);
	private final ByteBuf message;
	public ByteEchoClientHandler() {
		super(false);
		String hello = "Hello peer...";
		message = Unpooled.buffer(ByteEchoClient.SIZE);//堆buffer
        try {
        	message.writeBytes(hello.getBytes("UTF-8"));
        	message.retainedDuplicate();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
	}

	@SuppressWarnings("deprecation")
	@Override
	public void channelActive(final ChannelHandlerContext ctx) {
		log.info("ECHO active " +
		 NioUdtProvider.socketUDT(ctx.channel()).toStringOptions());
		ctx.writeAndFlush(message);
	}

	@Override
	public void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {
		ByteBuf in = (ByteBuf)msg;
    	byte[] bytes = new byte[in.writerIndex()];
    	in.readBytes(bytes);
    	//针对堆buf，direct buf不支持
//    	byte[] bytes = in.array();
    	String message = null;
		try {
			message = new String(bytes,"UTF-8");
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		}
    	log.info("=== reciever ack message from peer:" +message);
	}

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

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

}

启动服务端与客户端，控制台输出：
[b]服务端：[/b]
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.SocketUDT library location : ./lib/bin
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.SocketUDT loader provider : com.barchart.udt.lib.LibraryLoaderUDT
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.lib.PluginPropsUDT ARCH/OS/LINK = amd64/Windows/gpp
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.lib.LibraryLoaderUDT Platform supported.
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.lib.LibraryLoaderUDT Loading release libraries.
[INFO ] 2017-07-06 22:50:43 com.barchart.udt.lib.LibraryLoaderUDT Release libraries loaded.
[INFO ] 2017-07-06 22:50:44 io.netty.handler.logging.LoggingHandler [id: 0xf9f14d4c] REGISTERED
[INFO ] 2017-07-06 22:50:44 io.netty.handler.logging.LoggingHandler [id: 0xf9f14d4c] BIND: /192.168.31.153:10020
[INFO ] 2017-07-06 22:50:44 netty.main.udt.bytes.ByteEchoServer =========UDT Server is start=========
[INFO ] 2017-07-06 22:50:44 io.netty.handler.logging.LoggingHandler [id: 0xf9f14d4c, L:/192.168.31.153:10020] ACTIVE
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf9f14d4c, L:/192.168.31.153:10020] READ: [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767]
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf9f14d4c, L:/192.168.31.153:10020] READ COMPLETE
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] REGISTERED
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] ACTIVE
[INFO ] 2017-07-06 22:50:54 netty.handler.udt.bytes.ByteEchoServerHandler ECHO active
[id: 0x04f589e8]
0) Maximum_Transfer_Unit = 1,500
1) Is_Send_Synchronous = false
2) Is_Receive_Synchronous = false
3) Custom_Congestion_Control = null
4) Flight_Window_Size = 25,600 (25 K)
5) Protocol_Send_Buffer_Size = 12,058,624
6) Protocol_Receive_Buffer_Size = 12,058,624
7) Time_To_Linger_On_Close = 180
8) System_Send_Buffer_Size = 65,536
9) System_Receive_Buffer_Size = 12,288,000
12) Is_Randezvous_Connect_Enabled = false
13) Send_Timeout = -1
14) Receive_Timeout = -1
15) Is_Address_Reuse_Enabled = true
16) Maximum_Bandwidth = -1
17) Status_Code = 5
18) Epoll_Event_Mask = 4
19) Send_Buffer_Consumed = 0
20) Receive_Buffer_Available = 0
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] READ: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:50:54 netty.handler.udt.bytes.ByteEchoServerHandler ===Server reciever message:Hello peer...
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] WRITE: 16B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 68 65 6c 6c 6f 20 63 6c 69 65 6e 74 20 2e 2e 2e |hello client ...|
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] READ COMPLETE
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xf515214b, L:/192.168.31.153:10020 - R:/192.168.31.153:53767] FLUSH
[b]
客户端：[/b]
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.SocketUDT library location : ./lib/bin
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.SocketUDT loader provider : com.barchart.udt.lib.LibraryLoaderUDT
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.lib.PluginPropsUDT ARCH/OS/LINK = amd64/Windows/gpp
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.lib.LibraryLoaderUDT Platform supported.
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.lib.LibraryLoaderUDT Loading release libraries.
[INFO ] 2017-07-06 22:50:53 com.barchart.udt.lib.LibraryLoaderUDT Release libraries loaded.
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55] REGISTERED
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55] CONNECT: /192.168.31.153:10020
[INFO ] 2017-07-06 22:50:54 netty.main.udt.bytes.ByteEchoClient =========UDT Client is start=========
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55, L:/192.168.31.153:53767 - R:/192.168.31.153:10020] ACTIVE
[INFO ] 2017-07-06 22:50:54 netty.handler.udt.bytes.ByteEchoClientHandler ECHO active
[id: 0x0d729ae4]
0) Maximum_Transfer_Unit = 1,500
1) Is_Send_Synchronous = false
2) Is_Receive_Synchronous = false
3) Custom_Congestion_Control = null
4) Flight_Window_Size = 25,600 (25 K)
5) Protocol_Send_Buffer_Size = 10,485,056
6) Protocol_Receive_Buffer_Size = 10,485,056
7) Time_To_Linger_On_Close = 0
8) System_Send_Buffer_Size = 1,048,576
9) System_Receive_Buffer_Size = 1,048,576
12) Is_Randezvous_Connect_Enabled = false
13) Send_Timeout = -1
14) Receive_Timeout = -1
15) Is_Address_Reuse_Enabled = true
16) Maximum_Bandwidth = -1
17) Status_Code = 5
18) Epoll_Event_Mask = 4
19) Send_Buffer_Consumed = 0
20) Receive_Buffer_Available = 0
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55, L:/192.168.31.153:53767 - R:/192.168.31.153:10020] WRITE: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55, L:/192.168.31.153:53767 - R:/192.168.31.153:10020] FLUSH
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55, L:/192.168.31.153:53767 - R:/192.168.31.153:10020] READ: 16B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 68 65 6c 6c 6f 20 63 6c 69 65 6e 74 20 2e 2e 2e |hello client ...|
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:50:54 netty.handler.udt.bytes.ByteEchoClientHandler === reciever ack message from peer:hello client ...
[INFO ] 2017-07-06 22:50:54 io.netty.handler.logging.LoggingHandler [id: 0xa43a1a55, L:/192.168.31.153:53767 - R:/192.168.31.153:10020] READ COMPLETE

再来看一个peer对等UDT Byte Stream示例：
[b]peer端：[/b]

package netty.main.udt.peer;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.udt.UdtChannel;
import io.netty.channel.udt.nio.NioUdtProvider;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.concurrent.DefaultThreadFactory;
import netty.handler.udt.peer.ByteEchoPeerHandler;
import java.net.SocketAddress;
import java.util.concurrent.ThreadFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * UDT Byte Stream Peer
 * @author donald
 * 2017年7月3日
 * 上午9:01:35
 */
public class ByteEchoPeerBase {
	private static final Logger log = LoggerFactory.getLogger(ByteEchoPeerBase.class);
	protected final String peerName;
    protected final int messageSize;
    protected final SocketAddress myAddress;
    protected final SocketAddress peerAddress;

    public ByteEchoPeerBase(String peerName,int messageSize, SocketAddress myAddress, SocketAddress peerAddress) {
        this.peerName = peerName; 
    	this.messageSize = messageSize;
        this.myAddress = myAddress;
        this.peerAddress = peerAddress;
    }

    @SuppressWarnings("deprecation")
	public void run() throws Exception {
        final ThreadFactory connectFactory = new DefaultThreadFactory("rendezvous");
        final NioEventLoopGroup connectGroup = new NioEventLoopGroup(1,
                connectFactory, NioUdtProvider.BYTE_PROVIDER);
        try {
            final Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(connectGroup)
                    .channelFactory(NioUdtProvider.BYTE_RENDEZVOUS)
                    .handler(new ChannelInitializer<UdtChannel>() {
                        @Override
                        protected void initChannel(UdtChannel ch) throws Exception {
                            ch.pipeline().addLast(
                                    new LoggingHandler(LogLevel.INFO),
                                    new ByteEchoPeerHandler(messageSize));
                        }
                    });
            final ChannelFuture future = bootstrap.connect(peerAddress, myAddress).sync();
            log.info("========="+peerName +" is start=========");
            future.channel().closeFuture().sync();
        } finally {
            connectGroup.shutdownGracefully();
        }
    }
}

[b]peer one：[/b]

package netty.main.udt.peer;

import io.netty.util.internal.SocketUtils;
import netty.constant.udt.Config;

import java.net.InetSocketAddress;
import java.net.SocketAddress;

/**
 * UDT Byte Stream Peer one
 * @author donald
 * 2017年7月3日
 * 上午9:01:58
 */
public class ByteEchoPeerOne extends ByteEchoPeerBase {
    private static final String PEER_NAME = "peerOne";
    public ByteEchoPeerOne(int messageSize, SocketAddress myAddress, SocketAddress peerAddress) {
        super(PEER_NAME,messageSize, myAddress, peerAddress);
    }

    public static void main(String[] args) throws Exception {
        final int messageSize = 64 * 1024;
        final InetSocketAddress myAddress = SocketUtils.socketAddress(Config.hostOne, Config.portOne);
        final InetSocketAddress peerAddress = SocketUtils.socketAddress(Config.hostTwo, Config.portTwo);
        new ByteEchoPeerOne(messageSize, myAddress, peerAddress).run();
    }
}

[b]peer two：[/b]

package netty.main.udt.peer;

import io.netty.util.internal.SocketUtils;
import netty.constant.udt.Config;

import java.net.InetSocketAddress;
import java.net.SocketAddress;

/**
 * UDT Byte Stream Peer two
 * @author donald
 * 2017年7月3日
 * 上午9:02:14
 */
public class ByteEchoPeerTwo extends ByteEchoPeerBase {
	 private static final String PEER_NAME = "peerTwo";
    public ByteEchoPeerTwo(int messageSize, SocketAddress myAddress, SocketAddress peerAddress) {
        super(PEER_NAME,messageSize, myAddress, peerAddress);
    }
    public static void main(String[] args) throws Exception {
        final int messageSize = 64 * 1024;
        final InetSocketAddress myAddress = SocketUtils.socketAddress(Config.hostTwo, Config.portTwo);
        final InetSocketAddress peerAddress = SocketUtils.socketAddress(Config.hostOne, Config.portOne);
        new ByteEchoPeerTwo(messageSize, myAddress, peerAddress).run();
    }
}

[b]peer ip和port配置：[/b]

package netty.constant.udt;

/**
 * Peer to Peer Config
 * @author donald
 * 2017年7月3日
 * 上午9:22:01
 */
public final class Config {
    private Config() {
    }
    public static final String hostOne = "192.168.31.153";
    public static final int portOne = 10010;
    public static final String hostTwo = "192.168.31.153";
    public static final int portTwo = 10011;

}

启动peer one&two,控制台输出：
[b]peer one：[/b]
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.SocketUDT library location : ./lib/bin
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.SocketUDT loader provider : com.barchart.udt.lib.LibraryLoaderUDT
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.lib.PluginPropsUDT ARCH/OS/LINK = amd64/Windows/gpp
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.lib.LibraryLoaderUDT Platform supported.
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.lib.LibraryLoaderUDT Loading release libraries.
[INFO ] 2017-07-06 22:54:56 com.barchart.udt.lib.LibraryLoaderUDT Release libraries loaded.
[INFO ] 2017-07-06 22:54:56 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89] REGISTERED
[INFO ] 2017-07-06 22:54:56 io.netty.handler.logging.LoggingHandler 17CONNECT218218[id: 0xbd0fcb89] CONNECT: /192.168.31.153:10011, /192.168.31.153:10010
[INFO ] 2017-07-06 22:55:03 netty.main.udt.peer.ByteEchoPeerBase =========peerOne is start=========
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89, L:/192.168.31.153:10010 - R:/192.168.31.153:10011] ACTIVE
[INFO ] 2017-07-06 22:55:03 netty.handler.udt.peer.ByteEchoPeerHandler ECHO active
[id: 0x1c7738ed]
0) Maximum_Transfer_Unit = 1,500
1) Is_Send_Synchronous = false
2) Is_Receive_Synchronous = false
3) Custom_Congestion_Control = null
4) Flight_Window_Size = 25,600 (25 K)
5) Protocol_Send_Buffer_Size = 10,485,056
6) Protocol_Receive_Buffer_Size = 10,485,056
7) Time_To_Linger_On_Close = 0
8) System_Send_Buffer_Size = 1,048,576
9) System_Receive_Buffer_Size = 1,048,576
12) Is_Randezvous_Connect_Enabled = true
13) Send_Timeout = -1
14) Receive_Timeout = -1
15) Is_Address_Reuse_Enabled = true
16) Maximum_Bandwidth = -1
17) Status_Code = 5
18) Epoll_Event_Mask = 4
19) Send_Buffer_Consumed = 0
20) Receive_Buffer_Available = 0
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89, L:/192.168.31.153:10010 - R:/192.168.31.153:10011] WRITE: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89, L:/192.168.31.153:10010 - R:/192.168.31.153:10011] FLUSH
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89, L:/192.168.31.153:10010 - R:/192.168.31.153:10011] READ: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:55:03 netty.handler.udt.peer.ByteEchoPeerHandler ===reciever message from UDT Byte Stream Peer:Hello peer...
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0xbd0fcb89, L:/192.168.31.153:10010 - R:/192.168.31.153:10011] READ COMPLETE

[b]peer two：[/b]
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.SocketUDT library location : ./lib/bin
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.SocketUDT loader provider : com.barchart.udt.lib.LibraryLoaderUDT
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.lib.PluginPropsUDT ARCH/OS/LINK = amd64/Windows/gpp
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.lib.LibraryLoaderUDT Platform supported.
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.lib.LibraryLoaderUDT Loading release libraries.
[INFO ] 2017-07-06 22:55:02 com.barchart.udt.lib.LibraryLoaderUDT Release libraries loaded.
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe] REGISTERED
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler 17CONNECT218218[id: 0x703f93fe] CONNECT: /192.168.31.153:10010, /192.168.31.153:10011
[INFO ] 2017-07-06 22:55:03 netty.main.udt.peer.ByteEchoPeerBase =========peerTwo is start=========
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe, L:/192.168.31.153:10011 - R:/192.168.31.153:10010] ACTIVE
[INFO ] 2017-07-06 22:55:03 netty.handler.udt.peer.ByteEchoPeerHandler ECHO active
[id: 0x02f505e9]
0) Maximum_Transfer_Unit = 1,500
1) Is_Send_Synchronous = false
2) Is_Receive_Synchronous = false
3) Custom_Congestion_Control = null
4) Flight_Window_Size = 25,600 (25 K)
5) Protocol_Send_Buffer_Size = 10,485,056
6) Protocol_Receive_Buffer_Size = 10,485,056
7) Time_To_Linger_On_Close = 0
8) System_Send_Buffer_Size = 1,048,576
9) System_Receive_Buffer_Size = 1,048,576
12) Is_Randezvous_Connect_Enabled = true
13) Send_Timeout = -1
14) Receive_Timeout = -1
15) Is_Address_Reuse_Enabled = true
16) Maximum_Bandwidth = -1
17) Status_Code = 5
18) Epoll_Event_Mask = 4
19) Send_Buffer_Consumed = 0
20) Receive_Buffer_Available = 0
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe, L:/192.168.31.153:10011 - R:/192.168.31.153:10010] WRITE: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe, L:/192.168.31.153:10011 - R:/192.168.31.153:10010] FLUSH
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe, L:/192.168.31.153:10011 - R:/192.168.31.153:10010] READ: 13B
+-------------------------------------------------+
| 0 1 2 3 4 5 6 7 8 9 a b c d e f |
+--------+-------------------------------------------------+----------------+
|00000000| 48 65 6c 6c 6f 20 70 65 65 72 2e 2e 2e |Hello peer... |
+--------+-------------------------------------------------+----------------+
[INFO ] 2017-07-06 22:55:03 netty.handler.udt.peer.ByteEchoPeerHandler ===reciever message from UDT Byte Stream Peer:Hello peer...
[INFO ] 2017-07-06 22:55:03 io.netty.handler.logging.LoggingHandler [id: 0x703f93fe, L:/192.168.31.153:10011 - R:/192.168.31.153:10010] READ COMPLETE