mysql 协议的shutdown命令包及解析

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git

https://github.com/sea-boat/mysql-protocol

概况

mysql客户端可以用shutdown命令来关闭服务端。

mysql通信报文结构

类型名字描述 int<3> payload长度按照the least significant byte first存储，3个字节的payload和1个字节的序列号组合成报文头 int<1> 序列号 string payload 报文体，长度即为前面指定的payload长度

shutdown命令包

Payload

1              [08] COM_SHUTDOWN  if more data {1              shutdown type  }

更多详情： http://dev.mysql.com/doc/internals/en/com-shutdown.html

shutdown命令包类

/** *  * <pre><b>ping shutdown packet.</b></pre> * @author  * <pre>seaboat</pre> * <pre><b>email: </b>849586227@qq.com</pre> * <pre><b>blog: </b>http://blog.csdn.net/wangyangzhizhou</pre> * @version 1.0 * @see http://dev.mysql.com/doc/internals/en/com-shutdown.html */public class ShutdownPacket extends MySQLPacket {    //default value    public byte type = 0;    @Override    public int calcPacketSize() {        return 2;    }    @Override    protected String getPacketInfo() {        return "MySQL Shutdown Packet";    }    @Override    public void read(byte[] data) {        MySQLMessage mm = new MySQLMessage(data);        packetLength = mm.readUB3();        packetId = mm.read();        if (packetLength == 2)            type = mm.read();    }    @Override    public void write(ByteBuffer buffer) {        int size = calcPacketSize();        BufferUtil.writeUB3(buffer, size);        buffer.put(packetId);        buffer.put(COM_SHUTDOWN);        buffer.put(type);    }}

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