Trait DataProvider 

pub trait DataProvider<M>
where
    M: KeyedDataMarker,
{
    // Required method
    fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>;
}

A data provider that loads data for a specific DataKey.

Required Methods

fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

Query the provider for data, returning the result.

Returns Ok if the request successfully loaded data. If data failed to load, returns an Error with more information.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<'a, M, P> DataProvider<M> for &'a P

where M: KeyedDataMarker, P: DataProvider<M> + ?Sized,

fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

impl<M, P> DataProvider<M> for Arc<P>

where M: KeyedDataMarker, P: DataProvider<M> + ?Sized,

Available on target_has_atomic=ptr only.

fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

impl<M, P> DataProvider<M> for Box<P>

where M: KeyedDataMarker, P: DataProvider<M> + ?Sized,

fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

impl<M, P> DataProvider<M> for Rc<P>

where M: KeyedDataMarker, P: DataProvider<M> + ?Sized,

fn load(&self, req: DataRequest<'_>) -> Result<DataResponse<M>, DataError>

Implementors

impl DataProvider<HelloWorldV1Marker> for HelloWorldProvider

impl<M, P> DataProvider<M> for DowncastingAnyProvider<'_, P>

where P: AnyProvider + ?Sized, M: KeyedDataMarker, for<'a> YokeTraitHack<<M::Yokeable as Yokeable<'a>>::Output>: Clone, M::Yokeable: ZeroFrom<'static, M::Yokeable> + MaybeSendSync,