Netty4 Tcp长连接、断开重连、心跳监测、Msgpack编码解码

Netty4 Tcp长连接、断开重连、心跳监测、Msgpack编码解码

结构：

---

目录：

1. 导入Msgpack
2. 创建对象，命名DeviceValue
3. 创建type标记，命名TypeData
4. 创建msgpack编码器
5. 创建msgpack解码器
6. 创建相同Server端和Client端共有的消息处理类
7. 创建Client端消息处理类
8. 创建Server端消息处理类
9. 创建Client
10. 创建Server
11. 运行
12. 结果

---

• 导入Msgpack

compile 'org.msgpack:msgpack:0.6.12'

• 创建对象，命名DeviceValue（注意：需要在对象头上注入@Message）

package com.zmm.netty4msgpacktest.domain;

import org.msgpack.annotation.Message;

@Message
public class DeviceValue {

    private int type;

    private int seatId;

    private int speed;

    private int angle;

    public int getType() {
        return type;
    }

    public DeviceValue() {
    }

    public void setType(int type) {
        this.type = type;
    }

    public int getSeatId() {
        return seatId;
    }

    public void setSeatId(int seatId) {
        this.seatId = seatId;
    }

    public int getSpeed() {
        return speed;
    }

    public void setSpeed(int speed) {
        this.speed = speed;
    }

    public int getAngle() {
        return angle;
    }

    public void setAngle(int angle) {
        this.angle = angle;
    }


    @Override
    public String toString() {
        return "DeviceValue{" +
                "type=" + type +
                ", seatId=" + seatId +
                ", speed=" + speed +
                ", angle=" + angle +
                '}';
    }
}

• 创建type标记，命名TypeData（目的：通过DeviceValue中的不同type来区分数据类型）

package com.zmm.netty4msgpacktest.domain;

public interface TypeData {


    //模式
    byte PING = 1;

    byte PONG = 2;

    byte CUSTOME = 3;

    //*******************************
    byte PING_SEAT = 100;

    byte PONG_SEAT = 101;

    byte SERVER_RESPONSE = 102;

    byte SERVER_RESISTANT = 103;
}

• 创建msgpack编码器(Msgpack的具体用法可以去查一下，网上很多，其传输效率真的很高，很适合大量数据传递的情况)

package com.zmm.netty4msgpacktest.code;

import org.msgpack.MessagePack;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

public class MsgPackEncode extends MessageToByteEncoder<Object> {


    @Override
    protected void encode(ChannelHandlerContext ctx, Object msg, ByteBuf out) throws Exception {
        MessagePack msgPack = new MessagePack();
        byte[] raw = msgPack.write(msg);
        out.writeBytes(raw);
    }
}

• 创建msgpack解码器

package com.zmm.netty4msgpacktest.code;

import com.zmm.netty4msgpacktest.domain.DeviceValue;

import org.msgpack.MessagePack;

import java.util.List;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;

public class MsgPackDecode extends MessageToMessageDecoder {


    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf msg, List