mysql_binlog_connector_rust/event/
gtid_event.rs

1use crate::binlog_error::BinlogError;
2use byteorder::{LittleEndian, ReadBytesExt};
3use serde::{Deserialize, Serialize};
4use std::fmt::Write;
5use std::io::Cursor;
6
7#[derive(Debug, Deserialize, Serialize, Clone)]
8pub struct GtidEvent {
9    pub flags: u8,
10    pub gtid: String,
11}
12
13impl GtidEvent {
14    pub fn parse(cursor: &mut Cursor<&Vec<u8>>) -> Result<Self, BinlogError> {
15        // refer: https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-concepts.html
16        // refer: https://dev.mysql.com/doc/dev/mysql-server/latest/classbinary__log_1_1Gtid__event.html
17        let flags = cursor.read_u8()?;
18        let sid = Self::read_uuid(cursor)?;
19        let gno = cursor.read_u64::<LittleEndian>()?;
20
21        Ok(GtidEvent {
22            flags,
23            gtid: format!("{}:{}", sid, gno),
24        })
25    }
26
27    pub fn read_uuid(cursor: &mut Cursor<&Vec<u8>>) -> Result<String, BinlogError> {
28        Ok(format!(
29            "{}-{}-{}-{}-{}",
30            Self::bytes_to_hex_string(cursor, 4)?,
31            Self::bytes_to_hex_string(cursor, 2)?,
32            Self::bytes_to_hex_string(cursor, 2)?,
33            Self::bytes_to_hex_string(cursor, 2)?,
34            Self::bytes_to_hex_string(cursor, 6)?,
35        ))
36    }
37
38    fn bytes_to_hex_string(
39        cursor: &mut Cursor<&Vec<u8>>,
40        byte_count: u8,
41    ) -> Result<String, BinlogError> {
42        let mut res = String::new();
43        for _ in 0..byte_count {
44            write!(&mut res, "{:02x}", cursor.read_u8()?)?;
45        }
46        Ok(res)
47    }
48}
mysql_binlog_connector_rust/event/gtid_event.rs

mysql_binlog_connector_rust/event/
gtid_event.rs
