state_resolver

Trait StateResolver

Source 
pub trait StateResolver {
    type Error: 'static + Send + StateResolverError + Sync + Error;

    // Required method
    fn get_state<'life0, 'async_trait>(
        &'life0 self,
        use_case: String,
    ) -> Pin<Box<dyn Future<Output = Result<State, Self::Error>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}
Expand description

Defines how a state resolver looks like in general.

Required Associated Types§

Source

type Error: 'static + Send + StateResolverError + Sync + Error

The error type emitted by this trait’s functions.

Note that the error is supposed to implement StateResolverError to communicate standard errors.

Required Methods§

Source

fn get_state<'life0, 'async_trait>( &'life0 self, use_case: String, ) -> Pin<Box<dyn Future<Output = Result<State, Self::Error>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Retrieves the current reasoner state necessary for resolving policies.

Note that this state is agnostic to the specific reasoner connector used (and therefore policy language).

§Arguments
  • use_case: Some identifier that allows the state resolver to assume a different state depending on the use-case used.
§Returns

A new State struct that encodes the current state.

§Errors

This function may error whenever it likes. However, it’s recommended to trigger the errors specified in the StateResolverError trait if applicable.

Implementors§