Method append

nodedb/src/wal/audit_segment.rs:58–73

Append a serialized audit entry to the audit WAL. `data_lsn` is the data WAL LSN this audit entry corresponds to. Returns the audit WAL's own LSN for the appended record. Uses `RecordType::Put` (0x01) — the record_type is not semantically meaningful for the audit WAL; it uses the same WAL format for compatibility with the existing reader/writer infrastructure.

(&self, audit_bytes: &[u8], data_lsn: u64)

    /// meaningful for the audit WAL; it uses the same WAL format for
    /// compatibility with the existing reader/writer infrastructure.
    pub fn append(&self, audit_bytes: &[u8], data_lsn: u64) -> crate::Result<u64> {
        let mut wal = self.wal.lock().map_err(|_| crate::Error::Internal {
            detail: "audit WAL lock poisoned".into(),
        })?;

        // Prefix the payload with the data_lsn for cross-reference.
        let mut payload = Vec::with_capacity(8 + audit_bytes.len());
        payload.extend_from_slice(&data_lsn.to_le_bytes());
        payload.extend_from_slice(audit_bytes);

        let lsn = wal
            .append(RecordType::Put as u32, 0, 0, 0, &payload)
            .map_err(crate::Error::Wal)?;

        Ok(lsn)
    }

    /// Sync the audit WAL to disk (fsync).
    pub fn sync(&self) -> crate::Result<()> {