Namespace Opossum.Projections
Classes
- ProjectionDefinitionAttribute
Marks a class as a projection definition for automatic discovery
- ProjectionInitializationService
Background service that initializes projections on startup
- ProjectionMetadata
Metadata tracked for each projection instance. Enables intelligent features like cache warming, retention policies, and archiving.
- ProjectionOptions
Configuration options for the projection system
- ProjectionOptionsValidator
Validates ProjectionOptions configuration using IValidateOptions pattern. This runs at startup when options are first accessed.
- ProjectionRebuildDetail
Details of a single projection rebuild.
- ProjectionRebuildResult
Result of a projection rebuild operation.
- ProjectionRebuildStatus
Current status of projection rebuilding.
- ProjectionServiceCollectionExtensions
Extension methods for configuring projection services
- ProjectionTagsAttribute
Specifies the tag provider for a projection, enabling tag-based indexing and efficient queries. The tag provider will be automatically discovered and registered during assembly scanning.
Interfaces
- IProjectionDefinition<TState>
Defines how events are projected into a materialized view state
- IProjectionManager
Manages projection lifecycle, registration, and updates
- IProjectionRebuilder
Manages projection rebuild operations, including full rebuilds, selective rebuilds, and crash recovery. This interface is the single entry point for all rebuild-related functionality, cleanly separated from the live event processing managed by IProjectionManager.
- IProjectionStore<TState>
Storage interface for reading projection state
- IProjectionTagProvider<TState>
Defines how to extract indexable tags from a projection state. Tag providers enable efficient querying of projections without loading all data into memory.
- IProjectionWithRelatedEvents<TState>
Defines a projection that fetches related events from the event store to build its state. The framework will automatically load related events before calling Apply.
Enums
- AutoRebuildMode
Controls how the projection daemon handles missing or stale projections at startup.