netty学习记录2
昨天晚上在看到7.2章MessagePack编码器和解码器开发这一章时，书里面没有贴出全部的代码，然后我按照我自己的想法把代码补全后，发现死活没有把代码跑通。
然后花了挺多时间在网上找，很多博客都贴出了这一节的代码，但是基本上都是把书上有的给贴出来了，严重怀疑他们敲完代码后有没有跑一遍。
不过最后还是找到了一个博客里面贴全了代码，发现是UserInfo类里面缺了一个注解@Message导致代码没跑通的。
下面贴上全部代码
UserInfo.java
package MessagePack; import org.msgpack.annotation.Message; @Message public class UserInfo { private int age; private String name; public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } @Override public String toString() { return "age = " + age + "; name = " + name; } }
MsgpackDecoder.java
package MessagePack; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.handler.codec.MessageToMessageDecoder; import org.msgpack.MessagePack; import java.util.List; public class MsgpackDecoder extends MessageToMessageDecoder<ByteBuf> { protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf byteBuf, List<Object> list) throws Exception { final byte[] array; final int length = byteBuf.readableBytes(); array = new byte[length]; byteBuf.getBytes(byteBuf.readerIndex(), array, 0, length); MessagePack msgpack = new MessagePack(); list.add(msgpack.read(array)); } }
MsgpackEncoder.java
package MessagePack; import io.netty.buffer.ByteBuf; import io.netty.channel.ChannelHandlerContext; import io.netty.handler.codec.MessageToByteEncoder; import org.msgpack.MessagePack; public class MsgpackEncoder extends MessageToByteEncoder<Object> { protected void encode(ChannelHandlerContext channelHandlerContext, Object o, ByteBuf byteBuf) throws Exception { MessagePack msgpack = new MessagePack(); byte[] raw = msgpack.write(o); byteBuf.writeBytes(raw); } }
EchoServer.java
package MessagePack; 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 EchoServer { private final int port; public EchoServer(int port) { this.port = port; } public void bind() throws Exception { //配置服务端的NIO线程 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 protected void initChannel(SocketChannel socketChannel) throws Exception { socketChannel.pipeline().addLast("msgpack decoder", new MsgpackDecoder()); socketChannel.pipeline().addLast("msgpack encoder", new MsgpackEncoder()); socketChannel.pipeline().addLast(new EchoServerHandler()); } }); //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 System.out.println("bind"); f.channel().closeFuture().sync(); System.out.println("close"); } 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 = 22233; if (null != args && args.length > 0) { try { port = Integer.parseInt(args[0]); } catch (Exception e) { port = 22233; } } new EchoServer(port).bind(); } }
EchoServerHandler.java
package MessagePack; import io.netty.channel.ChannelHandlerAdapter; import io.netty.channel.ChannelHandlerContext; public class EchoServerHandler extends ChannelHandlerAdapter { @Override public void channelActive(ChannelHandlerContext ctx) { System.out.println("channelActive"); } @Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { System.out.println("Server receive the mspack message : " + msg); ctx.writeAndFlush(msg); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { System.out.println(cause.getMessage()); ctx.close(); } }
EchoClient.java
package MessagePack; 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 EchoClient { private final String host; private final int port; private final int sendNumber; public EchoClient(String host, int port, int sendNumber) { this.host = host; this.port = port; this.sendNumber = sendNumber; } public void connect() 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>() { protected void initChannel(SocketChannel socketChannel) throws Exception { socketChannel.pipeline().addLast("msgpack decoder", new MsgpackDecoder()); socketChannel.pipeline().addLast("msgpack encoder", new MsgpackEncoder()); socketChannel.pipeline().addLast(new EchoClientHandler(sendNumber)); } }); //发起异步连接操作 ChannelFuture f = b.connect(host, port).sync(); System.out.println("connect"); //等待客户端链路关闭 f.channel().closeFuture().sync(); System.out.println("close"); } finally { //优雅退出，释放NIO线程组 group.shutdownGracefully(); } } public static void main(String[] args) throws Exception { int port = 22233; if (null != args && args.length > 0) { try { port = Integer.parseInt(args[0]); } catch (Exception e) { port = 22233; } } new EchoClient("127.0.0.1", 22233, 100).connect(); } }
EchoClientHandler.java
package MessagePack; import io.netty.channel.ChannelHandlerAdapter; import io.netty.channel.ChannelHandlerContext; public class EchoClientHandler extends ChannelHandlerAdapter { private final int sendNumber; public EchoClientHandler(int sendNumber) { this.sendNumber = sendNumber; } @Override public void channelActive(ChannelHandlerContext ctx) { System.out.println("channelActive"); // ByteBuf byteBuf = Unpooled.copiedBuffer("asdf".getBytes()); // ctx.writeAndFlush(byteBuf); UserInfo[] infos = UserInfo(); for (UserInfo infoE : infos) { ctx.write(infoE); } ctx.flush(); } private UserInfo[] UserInfo() { UserInfo[] userInfos = new UserInfo[sendNumber]; UserInfo userInfo = null; for (int i=0; i < sendNumber; i++) { userInfo = new UserInfo(); userInfo.setAge(i); userInfo.setName("ABCDEFG --->" + i); userInfos[i] = userInfo; } return userInfos; } @Override public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception { System.out.println("Client receive the msgpack message : " + msg); //ctx.write(msg); } @Override public void channelReadComplete(ChannelHandlerContext ctx) throws Exception { ctx.flush(); } }
