Struct StateMachine 

pub struct StateMachine { /* private fields */ }

A redb-backed replicated state machine.

Implementations

impl StateMachine

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

Open (or create) a redb-backed state machine, creating the required tables up front.

pub fn apply(&self, cmd: &Cmd) -> Result<CmdResult, StateMachineError>

Apply a single command deterministically (called by every node once Raft has committed it).

pub fn get(&self, key: &[u8]) -> Result<Option<Vec<u8>>, StateMachineError>

Read a KV pair (a local read; linearizability is guaranteed by the Raft read-index above).

pub fn dump(&self) -> Result<Vec<u8>, StateMachineError>

For snapshots: serialize the entire business state (kv + locks) into bytes.

pub fn restore(&self, bytes: &[u8]) -> Result<(), StateMachineError>

Restore from a snapshot: clear kv / locks, then load the contents.

Trait Implementations

impl Clone for StateMachine

fn clone(&self) -> StateMachine

Returns a duplicate of the value.

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

Performs copy-assignment from source.