Rumah >pangkalan data >tutorial mysql >mysql 协议的processInfo命令包及解析
https://github.com/sea-boat/mysql-protocol
mysql客户端通过processInfo命令查询服务端活跃进程。
类型 | 名字 | 描述 |
---|---|---|
int5bdf4c78156c7953567bb5a0aef2fc53 | 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 |
intf35d6e602fd7d0f0edfa6f7d103c1b57 | 序列号 | |
string | payload | 报文体,长度即为前面指定的payload长度 |
Payload
1 [0a] COM_PROCCESS_INFO
更多详情 : http://dev.mysql.com/doc/internals/en/com-process-info.htm
/** * * <pre class="brush:php;toolbar:false"><b>process info command packet.</b>* @author *
seaboat*
<b>email: </b>849586227@qq.com*
<b>blog: </b>http://www.php.cn/;/pre> * @version 1.0 * @see http://www.php.cn/ */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); } }
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