Trait Persist

pub trait Persist: Send + Sync {
    // Required methods
    fn save_current<'life0, 'life1, 'async_trait>(
        &'life0 self,
        value: &'life1 CurrentValues,
    ) -> Pin<Box<dyn Future<Output = Result<(), BoxError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
    fn load_current<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Result<Option<CurrentValues>, BoxError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
    fn save_history<'life0, 'life1, 'life2, 'async_trait>(
        &'life0 self,
        key: &'life1 str,
        value: &'life2 ValueHistory,
    ) -> Pin<Box<dyn Future<Output = Result<(), BoxError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait;
    fn load_history<'life0, 'life1, 'async_trait>(
        &'life0 self,
        key: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Option<ValueHistory>, BoxError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait;
}

Responsible for storing and loading data from a permanent storage.

Async

The methods on this trait are async and can be implemented with the help of the async_trait crate:

use async_trait::async_trait;
use feattle_core::BoxError;
use feattle_core::persist::*;

struct MyPersistenceLogic;

#[async_trait]
impl Persist for MyPersistenceLogic {
    async fn save_current(&self, value: &CurrentValues) -> Result<(), BoxError> {
        unimplemented!()
    }

    async fn load_current(&self) -> Result<Option<CurrentValues>, BoxError> {
        unimplemented!()
    }

    async fn save_history(&self, key: &str, value: &ValueHistory) -> Result<(), BoxError> {
        unimplemented!()
    }

    async fn load_history(&self, key: &str) -> Result<Option<ValueHistory>, BoxError> {
        unimplemented!()
    }
}

Errors

The persistence layer can return an error, that will be bubbled up by other error types, like super::UpdateError and super::HistoryError.

Required Methods

fn save_current<'life0, 'life1, 'async_trait>( &'life0 self, value: &'life1 CurrentValues, ) -> Pin<Box<dyn Future<Output = Result<(), BoxError>> + Send + 'async_trait>>

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

Save current state of all feattles.

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

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

Load the current state of all feattles. With no previous state existed, Ok(None) should be returned.

fn save_history<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, key: &'life1 str, value: &'life2 ValueHistory, ) -> Pin<Box<dyn Future<Output = Result<(), BoxError>> + Send + 'async_trait>>

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

Save the full history of a single feattle.

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

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

Load the full history of a single feattle. With the feattle has no history, Ok(None) should be returned.

Implementors

impl Persist for NoPersistence