mysql 协议的删除DB命令包及解析

git

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

概况

mysql客户端通过删除DB命令包告诉服务端删除某个schema。

mysql通信报文结构

删除DB命令包

Payload

1              [06] COM_DROP_DB
string[EOF]    schema name

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

删除DB命令包操作

1. 删除DB命令包类

/**
 *
 * <pre><b>mysql drop db 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-drop-db.html
 */
public class DropDBPacket extends MySQLPacket {
    public byte flag;
    public byte[] schema;

    @Override
    public void read(byte[] data) {
        MySQLMessage mm = new MySQLMessage(data);
        packetLength = mm.readUB3();
        packetId = mm.read();
        flag = mm.read();
        this.schema = mm.readBytes();
    }

    @Override
    public void write(ByteBuffer buffer) {
        BufferUtil.writeUB3(buffer, calcPacketSize());
        buffer.put(packetId);
        buffer.put(COM_DROP_DB);
        buffer.put(schema);
    }

    @Override
    public int calcPacketSize() {
        int i = 1;
        i += schema.length;
        return i;
    }

    @Override
    protected String getPacketInfo() {
        return "MySQL Drop DB Packet";
    }

}

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