Struct LogStore 

pub struct LogStore { /* private fields */ }

In-memory Raft log store.

Entries live in a BTreeMap<u64, Entry> behind an Arc<Mutex<>>. Sufficient for single-node and small clusters; for durable setups, swap in a redb-backed implementation.

Implementations

impl LogStore

pub fn new() -> Self

Trait Implementations

impl Clone for LogStore

fn clone(&self) -> LogStore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for LogStore

fn default() -> Self

Returns the “default value” for a type.

impl RaftLogReader<OrcaTypeConfig> for LogStore

async fn try_get_log_entries<RB: RangeBounds<u64> + Clone + Debug + Send>( &mut self, range: RB, ) -> Result<Vec<Entry<OrcaTypeConfig>>, StorageError<u64>>

Get a series of log entries from storage.

fn limited_get_log_entries( &mut self, start: u64, end: u64, ) -> impl Future<Output = Result<Vec<<C as RaftTypeConfig>::Entry>, StorageError<<C as RaftTypeConfig>::NodeId>>> + Send

Returns log entries within range [start, end), end is exclusive, potentially limited by implementation-defined constraints.

impl RaftLogStorage<OrcaTypeConfig> for LogStore

type LogReader = LogStore

Log reader type.

async fn get_log_state( &mut self, ) -> Result<LogState<OrcaTypeConfig>, StorageError<u64>>

Returns the last deleted log id and the last log id.

async fn get_log_reader(&mut self) -> Self::LogReader

Get the log reader.

async fn save_vote(&mut self, vote: &Vote<u64>) -> Result<(), StorageError<u64>>

Save vote to storage.

async fn read_vote(&mut self) -> Result<Option<Vote<u64>>, StorageError<u64>>

Return the last saved vote by Self::save_vote.

async fn append<I>( &mut self, entries: I, callback: LogFlushed<OrcaTypeConfig>, ) -> Result<(), StorageError<u64>>

where I: IntoIterator<Item = Entry<OrcaTypeConfig>> + Send, I::IntoIter: Send,

Append log entries and call the callback once logs are persisted on disk.

async fn truncate( &mut self, log_id: LogId<u64>, ) -> Result<(), StorageError<u64>>

Truncate logs since log_id, inclusive

async fn purge(&mut self, log_id: LogId<u64>) -> Result<(), StorageError<u64>>

Purge logs upto log_id, inclusive

fn save_committed( &mut self, _committed: Option<LogId<<C as RaftTypeConfig>::NodeId>>, ) -> impl Future<Output = Result<(), StorageError<<C as RaftTypeConfig>::NodeId>>> + Send

Saves the last committed log id to storage.

fn read_committed( &mut self, ) -> impl Future<Output = Result<Option<LogId<<C as RaftTypeConfig>::NodeId>>, StorageError<<C as RaftTypeConfig>::NodeId>>> + Send

Return the last saved committed log id by Self::save_committed.