Struct SimWal 

pub struct SimWal { /* private fields */ }

Simulated Write-Ahead Log.

Implementations

impl SimWal

pub fn new() -> Self

pub fn append(&mut self, op: WalOp) -> u64

Append an entry to the WAL (buffered, not yet durable).

pub fn fsync(&mut self)

Fsync: mark all buffered entries as durable.

pub fn crash(&mut self)

Simulate a crash: only fsynced entries survive.

pub fn recover(&self) -> BTreeMap<Vec<u8>, Vec<u8>>

Recover: replay fsynced entries into a BTreeMap.

pub fn entries(&self) -> &[WalEntry]

Get all entries.

pub fn len(&self) -> usize

Number of entries.

pub fn is_empty(&self) -> bool

Is empty.

pub fn fsynced_up_to(&self) -> u64

LSN fsynced up to.

Trait Implementations

impl Default for SimWal

fn default() -> Self

Returns the “default value” for a type.