Struct SessionWal 

pub struct SessionWal { /* private fields */ }

Append-only write-ahead log backed by a file.

Implementations

impl SessionWal

pub fn open(path: impl AsRef<Path>) -> Result<Self>

Create or open a WAL at the given path.

pub fn append( &self, session_id: &str, transition: StateTransition, ) -> Result<u64>

Append a transition to the WAL. Returns the assigned sequence number.

pub fn read_all(&self) -> Result<Vec<WalEntry>>

Read all entries from the WAL (for replay).

pub fn truncate(&self) -> Result<()>

Truncate (clear) the WAL. Called after a successful checkpoint.

pub fn next_seq(&self) -> u64

Current next-sequence number.