Struct InMemoryStore 

pub struct InMemoryStore { /* private fields */ }

Non-durable StateStore backed by an in-memory map.

This is the default the framework uses when no store is configured: it keeps snapshots only for the lifetime of the process, so it does not survive a restart. It is useful as an explicit default, in tests, and as a reference implementation. For real restart durability, wire a disk- or database-backed store via Bot::with_state_store.

Cheaply cloneable — clones share the same underlying map (an Arc), so two handles to the same InMemoryStore see each other’s writes.

Implementations

impl InMemoryStore

pub fn new() -> InMemoryStore

Create an empty in-memory store.

pub fn len(&self) -> usize

Number of keys currently held.

pub fn is_empty(&self) -> bool

true when no keys are held.

Trait Implementations

impl Clone for InMemoryStore

fn clone(&self) -> InMemoryStore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for InMemoryStore

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

Formats the value using the given formatter.

impl Default for InMemoryStore

fn default() -> InMemoryStore

Returns the “default value” for a type.

impl StateStore for InMemoryStore

fn load<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Option<Value>, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, InMemoryStore: 'async_trait,

Load the snapshot stored under key, or None if there is none.

fn save<'life0, 'life1, 'async_trait>( &'life0 self, key: &'life1 str, value: Value, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, InMemoryStore: 'async_trait,

Persist value under key, overwriting any previous snapshot.

fn flush<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

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

Flush any buffered writes to durable storage.