Interface IProjection
- Namespace
- Stratara.Projections.Abstractions
- Assembly
- Stratara.Projections.dll
Marker interface for a Stratara projection (a read-model writer that reacts to events flowing through
the event bundle). Implementations declare one or more HandleAsync(TEvent, CancellationToken)
methods — public or private — that the ProjectionMethodInvoker discovers via reflection.
public interface IProjection- Extension Methods
Remarks
Projections are registered as scoped services. A new instance is resolved per event bundle, so cross-bundle
state must be persisted in the read store. Handler methods may accept either the event payload type
(HandleAsync(MyEvent, CancellationToken)) or the wrapping IEvent<MyEvent> when access
to metadata (StreamId, Version, …) is required. Mark handler methods with
[JetBrains.Annotations.UsedImplicitly] to suppress unused-member warnings.