Struct KeyValueStateMachine 

pub struct KeyValueStateMachine { /* private fields */ }

A key-value store state machine for testing and examples.

Implementations

impl KeyValueStateMachine

pub fn new() -> Self

pub fn get(&self, key: &str) -> Option<&Vec<u8>>

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

Trait Implementations

impl Clone for KeyValueStateMachine

fn clone(&self) -> KeyValueStateMachine

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KeyValueStateMachine

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for KeyValueStateMachine

fn default() -> Self

Returns the “default value” for a type.

impl StateMachine for KeyValueStateMachine

type Command = KvCommand

The command type that modifies the state machine.

type Output = KvOutput

The output produced when applying a command.

type SnapshotData = HashMap<String, Vec<u8>>

The snapshot data format.

fn apply(&mut self, command: Self::Command) -> Self::Output

Applies a command to the state machine, returning the result.

fn snapshot(&self) -> Self::SnapshotData

Creates a snapshot of the current state.

fn restore(&mut self, snapshot: Self::SnapshotData)

Restores the state machine from a snapshot.

fn name(&self) -> &str

Returns the name of this state machine (for logging/metrics).