Trait ExternalStateStore 

pub trait ExternalStateStore: Send + Sync {
    // Required methods
    fn resolve<'a>(
        &'a self,
        reference: &'a ExternalStateReference,
    ) -> impl Future<Output = Result<Vec<u8>, ExternalStateError>> + Send + 'a;
    fn store<'a>(
        &'a self,
        bytes: &'a [u8],
    ) -> impl Future<Output = Result<ExternalStateReference, ExternalStateError>> + Send + 'a;
}

A capability an adapter may implement to resolve and store external component state.

ADR-0008-shaped: a generic trait with an explicit call lifetime and an opaque future return, matching the item-component contract’s conventions. No concrete adapter ships with #144.

Required Methods

fn resolve<'a>( &'a self, reference: &'a ExternalStateReference, ) -> impl Future<Output = Result<Vec<u8>, ExternalStateError>> + Send + 'a

Resolves the bytes a reference identifies.

Errors

Returns ExternalStateError::ContentMissing when the referenced content cannot be found, or ExternalStateError::ContentMismatch when the resolved bytes do not match the declared content identity.

fn store<'a>( &'a self, bytes: &'a [u8], ) -> impl Future<Output = Result<ExternalStateReference, ExternalStateError>> + Send + 'a

Stores bytes and returns their bounded, content-identified reference.

Errors

Returns ExternalStateError::StoreFailed when the adapter cannot durably retain the bytes.

Dyn Compatibility

This trait is not dyn compatible.

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

Implementors