mysql协议的processInfo命令包及解析

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mysql协议的processInfo命令包及解析

mysql协议的processInfo命令包及解析:githttps://github.com/sea-boat/mysql-protocol概况mysql客户端通过processInfo命令查询服务端活跃进程。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pa

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导读mysql协议的processInfo命令包及解析:githttps://github.com/sea-boat/mysql-protocol概况mysql客户端通过processInfo命令查询服务端活跃进程。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pa

git

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

概况

mysql客户端通过processInfo命令查询服务端活跃进程。

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

processInfo命令包

Payload

1 [0a] COM_PROCCESS_INFO

更多详情： http://dev.mysql.com/doc/internals/en/com-process-info.htm

processInfo命令包类

/**
 * 
 * <pre><b>process info command packet.</b></pre>
 * @author 
 * <pre>seaboat</pre>
 * <pre><b>email: </b>849586227@qq.com</pre>
 * <pre><b>blog: </b>http://www.gxlcms.com/;/pre>
 * @version 1.0
 * @see http://www.gxlcms.com/
 */public class ProcessInfoPacket extends MySQLPacket {

 public byte payload; @Override
 public int calcPacketSize() { return 1;
 } @Override
 protected String getPacketInfo() { return "MySQL Process Info Packet";
 } @Override
 public void read(byte[] data) {
 MySQLMessage mm = new MySQLMessage(data);
 packetLength = mm.readUB3();
 packetId = mm.read();
 payload = mm.read();
 } @Override
 public void write(ByteBuffer buffer) { int size = calcPacketSize();
 BufferUtil.writeUB3(buffer, size);
 buffer.put(packetId);
 buffer.put(COM_PROCESS_INFO);
 }

}