crabka_replicator/mm2/
offset_sync.rs

1use crate::error::ReplicatorError;
2
3use super::{Reader, Writer};
4
5#[derive(Debug, Clone, PartialEq, Eq)]
6pub struct OffsetSync {
7    pub topic: String,
8    pub partition: i32,
9    pub upstream: i64,
10    pub downstream: i64,
11}
12
13impl OffsetSync {
14    #[must_use]
15    pub fn topic_name(source_alias: &str) -> String {
16        format!("mm2-offset-syncs.{source_alias}.internal")
17    }
18
19    #[must_use]
20    pub fn key_bytes(&self) -> Vec<u8> {
21        Writer::keyless()
22            .string(&self.topic)
23            .i32(self.partition)
24            .finish()
25    }
26
27    #[must_use]
28    pub fn value_bytes(&self) -> Vec<u8> {
29        // OffsetSync has no HEADER_SCHEMA / version field at all in the JVM MM2
30        // codec — both key and value are versionless (unlike Heartbeat and
31        // Checkpoint, whose *value* carries a version header).
32        Writer::keyless()
33            .i64(self.upstream)
34            .i64(self.downstream)
35            .finish()
36    }
37
38    pub fn from_bytes(key: &[u8], val: &[u8]) -> Result<Self, ReplicatorError> {
39        let mut k = Reader::keyless(key);
40        let mut v = Reader::keyless(val);
41        Ok(Self {
42            topic: k.string()?,
43            partition: k.i32()?,
44            upstream: v.i64()?,
45            downstream: v.i64()?,
46        })
47    }
48}
crabka_replicator/mm2/offset_sync.rs

crabka_replicator/mm2/
offset_sync.rs
