Struct NativeVersionedLog 

pub struct NativeVersionedLog<S: ?Sized> { /* private fields */ }

Versioned transaction log backed by a native key/value-style store.

Each transaction is written as its own create-only object keyed (name, write_version, t), so an append is a single small insert with no read and no growing buffer. The writer is the sole appender under its lease version (the fence gives each active owner its own version; a deposed writer’s stale appends land in a version the takeover cutoff discards), so tracking next_t in memory is all the append state required.

Implementations

impl<S: NativeLogStorage + ?Sized + 'static> NativeVersionedLog<S>

pub async fn open( storage: Arc<S>, name: &str, write_version: u64, ) -> Result<Self, LogError>

Opens the log for writing under write_version.

Errors

Returns an error when stored records cannot be read or decoded.

Trait Implementations

impl<S: NativeLogStorage + ?Sized + 'static> TransactionLog for NativeVersionedLog<S>

fn append(&self, record: &TxRecord) -> Result<(), LogError>

Durably appends exactly the next transaction.

fn append_async<'life0, 'life1, 'async_trait>( &'life0 self, record: &'life1 TxRecord, ) -> Pin<Box<dyn Future<Output = Result<(), LogError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Durably appends exactly the next transaction without blocking an async runtime worker. Synchronous logs use Self::append by default; storage-backed logs override this method and await their backend.

fn append_batch_async<'life0, 'life1, 'async_trait>( &'life0 self, records: &'life1 [TxRecord], ) -> Pin<Box<dyn Future<Output = Result<(), LogError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Durably appends a contiguous run of transactions under a single durability boundary where the backend supports one (one fsync, one object, one database transaction), so group commit amortizes the per-append cost across the batch. records must be contiguous in t starting at the log’s next expected t; an empty slice is a no-op. The default appends them one at a time; batching backends override this.

fn tx_range( &self, start: u64, end: Option<u64>, ) -> Result<Vec<TxRecord>, LogError>

Returns records in the half-open transaction range [start, end).

fn tx_range_async<'life0, 'async_trait>( &'life0 self, start: u64, end: Option<u64>, ) -> Pin<Box<dyn Future<Output = Result<Vec<TxRecord>, LogError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Asynchronous form of Self::tx_range.

fn replay(&self) -> Result<Vec<TxRecord>, LogError>

Replays every committed record.

fn replay_async<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<Vec<TxRecord>, LogError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Asynchronously replays every committed record.