Package com.opencqrs.framework.eventhandler.partitioning

Interface EventSequenceResolver<E>

Type Parameters:

E - the generic Java event type

All Known Subinterfaces:

EventSequenceResolver.ForObjectAndMetaDataAndRawEvent<E>, EventSequenceResolver.ForRawEvent

All Known Implementing Classes:

NoEventSequenceResolver, PerConfigurableLevelSubjectEventSequenceResolver, PerSubjectEventSequenceResolver

public sealed interface EventSequenceResolver<E>
permits EventSequenceResolver.ForRawEvent, EventSequenceResolver.ForObjectAndMetaDataAndRawEvent<E>

Sealed base interface for inherited FunctionalInterface variants encapsulating the logic to derive a sequence identifier for an event.

An event's sequence identifier is a String determining, if two consecutive events must be handled in order. Two events with the same sequence identifier will be handled with respect to their order within the event stream, while events with different sequence identifiers may be handled in parallel with no ordering constraints.

See Also:

• EventHandlingProcessor.run()

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	EventSequenceResolver.ForObjectAndMetaDataAndRawEvent<E>	FunctionalInterface to be implemented, if an event's sequence identifier can only be derived from a fully upcasted and deserialized Java event object.
static interface	EventSequenceResolver.ForRawEvent	FunctionalInterface to be implemented, if an event's sequence identifier can be derived from a raw Event, that is without any upcasting or Java object deserialization.