Package com.opencqrs.framework.eventhandler

Interface EventHandler<E>

Type Parameters:

E - the generic Java type of the Event being handled

All Known Subinterfaces:

EventHandler.ForObject<E>, EventHandler.ForObjectAndMetaData<E>, EventHandler.ForObjectAndMetaDataAndRawEvent<E>

public sealed interface EventHandler<E>
permits EventHandler.ForObject<E>, EventHandler.ForObjectAndMetaData<E>, EventHandler.ForObjectAndMetaDataAndRawEvent<E>

Sealed base interface for inherited FunctionalInterface variants encapsulating encapsulating Event handling logic.

Implementations of this will be called after the raw Event retrieved from the event stream has been successfully upcasted and converted to their appropriate Java object type.This implies that implemented FunctionalInterface methods may be called multiple times or not at all for the same raw event, depending on the configured EventUpcasters.

See Also:

• EventUpcasters.upcast(Event)
• EventTypeResolver.getJavaClass(String)
• EventDataMarshaller.deserialize(Map, Class)

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	EventHandler.ForObject<E>	FunctionalInterface to be implemented, if only the Java event is needed for processing.
static interface	EventHandler.ForObjectAndMetaData<E>	FunctionalInterface to be implemented, if the Java event and its meta-data is needed for processing.
static interface	EventHandler.ForObjectAndMetaDataAndRawEvent<E>	FunctionalInterface to be implemented, if the Java event, its meta-data, and the raw event is needed for processing.