Package com.opencqrs.framework.command

Interface StateRebuildingHandler<I,E>

Type Parameters:

I - the instance type

E - the event type to be sourced

All Known Subinterfaces:

StateRebuildingHandler.FromObject<I,E>, StateRebuildingHandler.FromObjectAndMetaData<I,E>, StateRebuildingHandler.FromObjectAndMetaDataAndSubject<I,E>, StateRebuildingHandler.FromObjectAndMetaDataAndSubjectAndRawEvent<I,E>, StateRebuildingHandler.FromObjectAndRawEvent<I,E>

public sealed interface StateRebuildingHandler<I,E>
permits StateRebuildingHandler.FromObject<I,E>, StateRebuildingHandler.FromObjectAndRawEvent<I,E>, StateRebuildingHandler.FromObjectAndMetaData<I,E>, StateRebuildingHandler.FromObjectAndMetaDataAndSubject<I,E>, StateRebuildingHandler.FromObjectAndMetaDataAndSubjectAndRawEvent<I,E>

Sealed base interface for inherited FunctionalInterface variants encapsulating the event-sourcing logic needed to reconstruct instance state from an event stream.

Implementations of this will be used during Command execution as follows:

1. The instance state will be reconstructed based on the Events sourced for the Command.getSubject() before the CommandHandler execution, after they have been successfully upcasted and converted to their appropriate Java object type. This phase allows access to the raw Event read from the event store.
2. Any event published during command execution via CommandEventPublisher will be applied to update the instance state before the events will be written to the event store. Hence, this phase does not have access to the raw Event.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	StateRebuildingHandler.FromObject<I,E>	FunctionalInterface to be implemented, if only the Java event is needed to reconstruct the instance state.
static interface	StateRebuildingHandler.FromObjectAndMetaData<I,E>	FunctionalInterface to be implemented, if the Java event and its meta-data is needed to reconstruct the instance state.
static interface	StateRebuildingHandler.FromObjectAndMetaDataAndSubject<I,E>	FunctionalInterface to be implemented, if the Java event, its meta-data, and subject is needed to reconstruct the instance state.
static interface	StateRebuildingHandler.FromObjectAndMetaDataAndSubjectAndRawEvent<I,E>	FunctionalInterface to be implemented, if the Java event, its meta-data, subject, and optional raw event is needed to reconstruct the instance state.
static interface	StateRebuildingHandler.FromObjectAndRawEvent<I,E>	FunctionalInterface to be implemented, if the Java event and the raw Event is needed to reconstruct the instance state.