網路編程 -- RPC實現原理 -- Netty -- 迭代版本V2 -- 對象傳輸

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　網路編程 -- RPC實現原理 -- 目錄

　　啦啦啦

V2——Netty -- 使用序列化和還原序列化在網路上傳輸對象

　只能傳輸（　ByteBuf, FileRegion　）兩種類型，因此必須將對象在發送之前進行序列化，放進ByteBuf中，用戶端接收到ByteBuf時，將位元組碼取出，還原序列化成對象。

　

　　Class ： Server

package lime.pri.limeNio.netty.netty02.exercise;import java.net.InetSocketAddress;import java.util.Date;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.SerializerFeature;import io.netty.bootstrap.ServerBootstrap;import io.netty.buffer.ByteBuf;import io.netty.channel.ChannelFuture;import io.netty.channel.ChannelFutureListener;import io.netty.channel.ChannelHandlerAdapter;import io.netty.channel.ChannelHandlerContext;import io.netty.channel.ChannelInitializer;import io.netty.channel.ChannelPipeline;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.util.CharsetUtil;import lime.pri.limeNio.netty.netty03.entity.User;public class Server {    public static void main(String[] args) throws Exception {        ServerBootstrap serverBootstrap = new ServerBootstrap();        EventLoopGroup boss = new NioEventLoopGroup();        EventLoopGroup worker = new NioEventLoopGroup();        serverBootstrap.group(boss, worker);        serverBootstrap.channel(NioServerSocketChannel.class);        serverBootstrap.childHandler(new ChannelInitializer<SocketChannel>() {            @Override            protected void initChannel(SocketChannel ch) throws Exception {                ChannelPipeline pipeline = ch.pipeline();                pipeline.addLast(new ChannelHandlerAdapter(){                    @Override                    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {                        ByteBuf byteBuf = (ByteBuf) msg;                        String request = byteBuf.toString(CharsetUtil.UTF_8);                        System.out.println("用戶端請求資料：" + request);                                                String response = JSON.toJSONString("請求參數不正確",SerializerFeature.WriteClassName);                        if("Query Date".equalsIgnoreCase(request)){                            response = JSON.toJSONString("當前系統時間：" + new Date().toString(),SerializerFeature.WriteClassName);                        }else if("Query User".equalsIgnoreCase(request)){                            response = JSON.toJSONString(new User(1,"lime",new Date()), SerializerFeature.WriteClassName);                        }                                                byteBuf.clear();                        byteBuf.writeBytes(response.getBytes(CharsetUtil.UTF_8));                        ChannelFuture channelFuture = ctx.writeAndFlush(byteBuf);                        channelFuture.addListener(ChannelFutureListener.CLOSE);                    }                                    });            }        });        ChannelFuture channelFuture = serverBootstrap.bind(new InetSocketAddress(9999)).sync();        channelFuture.channel().closeFuture().sync();        boss.close();        worker.close();    }}

　　Class ： Client

package lime.pri.limeNio.netty.netty02.exercise;import java.net.InetSocketAddress;import com.alibaba.fastjson.JSON;import io.netty.bootstrap.Bootstrap;import io.netty.buffer.ByteBuf;import io.netty.buffer.Unpooled;import io.netty.channel.ChannelFuture;import io.netty.channel.ChannelHandlerAdapter;import io.netty.channel.ChannelHandlerContext;import io.netty.channel.ChannelInitializer;import io.netty.channel.ChannelPipeline;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 io.netty.util.CharsetUtil;public class Client {    public static void main(String[] args) throws Exception {        for (int i = 0; i < 10; i++) {            new Thread() {                {                    setDaemon(false);                }                public void run() {                    try {                        client();                    } catch (Exception e) {                        e.printStackTrace();                    }                };            }.start();        }    }    private static void client() throws Exception {        Bootstrap bootstrap = new Bootstrap();        EventLoopGroup worker = new NioEventLoopGroup();        bootstrap.group(worker);        bootstrap.channel(NioSocketChannel.class);        bootstrap.handler(new ChannelInitializer<SocketChannel>() {            @Override            protected void initChannel(SocketChannel ch) throws Exception {                ChannelPipeline pipeline = ch.pipeline();                pipeline.addLast(new ChannelHandlerAdapter() {                    /**                     * 預設只捕獲網路連接異常                     */                    @Override                    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {                        System.out.println(cause);                    }                    @Override                    public void channelActive(ChannelHandlerContext ctx) throws Exception {                        String request = null;                        switch ((int) (Math.random() * 10) % 3) {                        case 0:                            request = "Query Date";                            break;                        case 1:                            request = "Query User";                            break;                        default:                            request = "Query What?";                            break;                        }                        ctx.writeAndFlush(Unpooled.buffer().writeBytes(request.getBytes(CharsetUtil.UTF_8)));                    }                    @Override                    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {                        ByteBuf byteBuf = (ByteBuf) msg;                        System.out.println("服務端響應資料 --> " + JSON.parse(byteBuf.toString(CharsetUtil.UTF_8)));                    }                });            }        });        ChannelFuture channelFuture;        channelFuture = bootstrap.connect(new InetSocketAddress(9999)).sync();        channelFuture.channel().closeFuture().sync();        worker.close();    }}

　　Console ： Server

用戶端請求資料：Query What?用戶端請求資料：Query User用戶端請求資料：Query User用戶端請求資料：Query Date用戶端請求資料：Query Date用戶端請求資料：Query What?用戶端請求資料：Query Date用戶端請求資料：Query Date用戶端請求資料：Query User用戶端請求資料：Query User

　　Console ： Client

服務端響應資料 --> 當前系統時間：Sat Jun 24 18:21:40 CST 2017服務端響應資料 --> 請求參數不正確服務端響應資料 --> 當前系統時間：Sat Jun 24 18:21:40 CST 2017服務端響應資料 --> 請求參數不正確服務端響應資料 --> 當前系統時間：Sat Jun 24 18:21:40 CST 2017服務端響應資料 --> 當前系統時間：Sat Jun 24 18:21:40 CST 2017服務端響應資料 --> User [id=1, name=lime, birth=Sat Jun 24 18:21:40 CST 2017]服務端響應資料 --> User [id=1, name=lime, birth=Sat Jun 24 18:21:40 CST 2017]服務端響應資料 --> User [id=1, name=lime, birth=Sat Jun 24 18:21:40 CST 2017]服務端響應資料 --> User [id=1, name=lime, birth=Sat Jun 24 18:21:40 CST 2017]

啦啦啦

網路編程 -- RPC實現原理 -- Netty -- 迭代版本V2 -- 對象傳輸