Struct StateBackend 

pub struct StateBackend { /* private fields */ }

Simple in-memory backend backed by a HashMap.

State is lost when the process exits. Suitable for testing, short-lived sessions, and development.

Implementations

impl StateBackend

pub fn new() -> Self

Create a new empty in-memory backend.

Trait Implementations

impl Backend for StateBackend

fn save_state<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, session_id: &'life1 str, state: &'life2 Value, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Save the state for a given session.

fn load_state<'life0, 'life1, 'async_trait>( &'life0 self, session_id: &'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 state for a given session. Returns None if no state exists.

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

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

List all known session IDs.

fn read_file<'life0, 'life1, 'async_trait>( &'life0 self, _path: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<String>> + Send + 'async_trait>>

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

Read the contents of a file at the given path.

fn write_file<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, _path: &'life1 str, _content: &'life2 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Write content to a file at the given path, creating directories as needed.

fn edit_file<'life0, 'life1, 'life2, 'life3, 'async_trait>( &'life0 self, _path: &'life1 str, _old: &'life2 str, _new: &'life3 str, ) -> Pin<Box<dyn Future<Output = Result<()>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, 'life3: 'async_trait,

Replace the first occurrence of old with new in the file at the given path.

fn list_dir<'life0, 'life1, 'async_trait>( &'life0 self, _path: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<Vec<FileInfo>>> + Send + 'async_trait>>

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

List entries in the directory at the given path.

impl Clone for StateBackend

fn clone(&self) -> StateBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for StateBackend

fn default() -> Self

Returns the “default value” for a type.