Struct WalEntry 

pub struct WalEntry {
    pub sequence: u64,
    pub entry_type: WalEntryType,
    pub key: String,
    pub value: Option<Vec<u8>>,
    pub transaction_id: Option<u64>,
    pub checksum: u32,
}

A single record in the write-ahead log.

Fields

sequence: u64

Monotonically increasing, globally unique sequence number.

entry_type: WalEntryType

Semantic type of this entry.

key: String

Key this entry addresses (empty for Begin/Commit/Rollback).

value: Option<Vec<u8>>

Optional payload for Put operations; None for Delete / control entries.

transaction_id: Option<u64>

Transaction this entry belongs to, if any.

checksum: u32

FNV-1a 32-bit checksum over (sequence, key, value).

Implementations

impl WalEntry

pub fn compute_checksum(seq: u64, key: &str, value: &Option<Vec<u8>>) -> u32

Computes FNV-1a 32-bit checksum over sequence || key || value.

pub fn is_valid(&self) -> bool

Returns true iff the stored checksum matches the recomputed one.

Trait Implementations

impl Clone for WalEntry

fn clone(&self) -> WalEntry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WalEntry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.