Struct JsonFileStore 

pub struct JsonFileStore { /* private fields */ }

A StateStore that persists snapshots to a JSON file on disk.

Open one with JsonFileStore::open (which loads any existing file), then hand it to Bot::with_state_store:

use std::sync::Arc;
use rustrade::JsonFileStore;
let store = Arc::new(JsonFileStore::open("/var/lib/fks/bot-risk.json").await?);
// Bot::builder()...build()?.with_state_store(store)

Implementations

impl JsonFileStore

pub async fn open(path: impl Into<PathBuf>) -> Result<Self>

Open (or create) a store at path, loading any existing snapshot map.

A missing file starts empty (first boot). The parent directory is created if needed.

Errors

Error::Storage if the parent dir can’t be created, the file can’t be read, or an existing file is corrupt (not valid JSON object) — corruption is surfaced rather than silently dropping persisted state.

pub fn path(&self) -> &Path

The file path this store persists to.

Trait Implementations

impl StateStore for JsonFileStore

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

where Self: 'async_trait, 'life0: 'async_trait, 'life1: '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<()>> + Send + 'async_trait>>

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

Persist value under key, overwriting any previous snapshot.

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

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

Flush any buffered writes to durable storage.