Package org.axonframework.eventhandling

Classes related to event handling and dispatching, such as Event Listeners and the Event Bus.

See: Description

Interface Summary

Interface	Description
DomainEventData<T>	Interface describing the properties of serialized Domain Event Messages.
DomainEventMessage<T>	Represents a Message that wraps a DomainEvent and an Event representing an important change in the Domain.
DomainEventSequenceAware	Contract describing a component which is aware of DomainEventMessage their sequences and is capable of providing the last known sequence number for a given Aggregate identifier.
ErrorHandler	Interface of the error handler that will be invoked if event processing fails.
EventBus	Specification of the mechanism on which the Event Listeners can subscribe for events and event publishers can publish their events.
EventData<T>	Interface describing the properties of serialized Event Messages.
EventHandlerInvoker	Interface for an event message handler that defers handling to one or more other handlers.
EventMessage<T>	Represents a Message wrapping an Event, which is represented by its payload.
EventMessageHandler	Interface to be implemented by classes that can handle events.
EventProcessingStrategy	Interface describing a strategy for the processing of a batch of events.
EventProcessor	An Event Processor processes event messages from an event queue or event bus.
EventTrackerStatus	Interface describing the status of a Segment of a TrackingEventProcessor.
EventTrackerStatusChangeListener	Represent a listener that is notified whenever the Map of EventTrackerStatus' in the TrackingEventProcessor this component is registered to has changed.
ListenerInvocationErrorHandler	Interface of an error handler that is invoked when an exception is triggered as result of an EventMessageHandler handling an event.
StreamingEventProcessor	An EventProcessor which processes an event stream in segments.
TrackedEventData<T>	Interface describing the properties of serialized Event Messages containing a TrackingToken.
TrackedEventMessage<T>	Represents an EventMessage containing a TrackingToken.
TrackingEventStream	Describes a stream of TrackedEventMessages.
TrackingToken	Tag interface identifying a token that is used to identify the position of an event in an event stream.
WrappedToken	Interface marking a token that wraps another token.

Class Summary

Class	Description
AbstractDomainEventEntry<T>	Abstract base class of a serialized domain event.
AbstractEventBus	Base class for the Event Bus.
AbstractEventBus.Builder	Abstract Builder class to instantiate AbstractEventBus implementations.
AbstractEventEntry<T>	Abstract base class of a serialized event.
AbstractEventProcessor	Abstract implementation of an EventProcessor.
AbstractEventProcessor.Builder	Abstract Builder class to instantiate a AbstractEventProcessor.
AbstractSequencedDomainEventEntry<T>	Abstract base class of a serialized domain event.
AddedTrackerStatus	References a new EventTrackerStatus which work just has started on.
AnnotationEventHandlerAdapter	Adapter that turns any bean with EventHandler annotated methods into an EventMessageHandler.
ConcludesBatchParameterResolverFactory	Paramater resolver factory for boolean event handler parameters annotated with ConcludesBatch.
ErrorContext	Describes the context of an error.
EventUtils	Utility class for dealing with events.
GapAwareTrackingToken	Implementation of a TrackingToken that uses the global insertion sequence number of the event to determine tracking order and additionally stores a set of possible gaps that have been detected while tracking the event store.
GenericDomainEventEntry<T>	Generic implementation of a serialized domain event entry.
GenericDomainEventMessage<T>	Generic implementation of a DomainEventMessage.
GenericEventMessage<T>	Generic implementation of the EventMessage interface.
GenericTrackedDomainEventMessage<T>	Generic implementation of a DomainEventMessage that is also a TrackedEventMessage.
GenericTrackedEventMessage<T>	Generic implementation of a TrackedEventMessage.
GlobalSequenceTrackingToken	Tracking token based on the global sequence number of an event.
LoggingErrorHandler	Implementation of a ListenerInvocationErrorHandler that logs exceptions as errors but otherwise does nothing to prevent event handling from continuing.
MergedTrackingToken	Special Wrapped Token implementation that keeps track of two separate tokens, of which the streams have been merged into a single one.
MultiEventHandlerInvoker	Implementation of EventHandlerInvoker with capabilities to invoke several different invokers.
MultiSourceTrackingToken	A TrackingToken implementation combining several TrackingTokens into one.
MultiStreamableMessageSource	Implementation which allows for tracking processors to process messages from an arbitrary number of sources.
MultiStreamableMessageSource.Builder	Builder class to instantiate a MultiStreamableMessageSource.
RemovedTrackerStatus	References an EventTrackerStatus which no active work is occurring on.
ReplayToken	Token keeping track of the position before a reset was triggered.
Segment	A representation of a segment and corresponding mask with various capabilities.
SequenceNumberParameterResolverFactory	An extension of the AbstractAnnotatedParameterResolverFactory that accepts parameters of a Long type annotated with the SequenceNumber annotation and assigns the sequenceNumber of the DomainEventMessage.
SequenceNumberParameterResolverFactory.SequenceNumberParameterResolver	ParameterResolver that resolves SequenceNumber parameters
SimpleEventBus	Implementation of the EventBus that dispatches events in the thread the publishes them.
SimpleEventBus.Builder	Builder class to instantiate a SimpleEventBus.
SimpleEventHandlerInvoker	Implementation of an EventHandlerInvoker that forwards events to a list of registered EventMessageHandler.
SimpleEventHandlerInvoker.Builder<B extends SimpleEventHandlerInvoker.Builder<?>>	Builder class to instantiate a SimpleEventHandlerInvoker.
SubscribingEventProcessor	Event processor implementation that subscribes to the EventBus for events.
SubscribingEventProcessor.Builder	Builder class to instantiate a SubscribingEventProcessor.
TimestampParameterResolverFactory	AbstractAnnotatedParameterResolverFactory that accepts parameters with type Instant that are annotated with the Timestamp annotation and assigns the timestamp of the EventMessage.
TrackedDomainEventData<T>	Specialization of the DomainEventData class that includes the Token representing the position of this event in a stream.
TrackerStatus	Implementation of the EventTrackerStatus, providing simply modification methods to switch from one EventTrackerStatus value object to another.
TrackingEventProcessor	EventProcessor implementation that tracks events from a StreamableMessageSource.
TrackingEventProcessor.Builder	Builder class to instantiate a TrackingEventProcessor.
TrackingEventProcessorConfiguration	Configuration object for the TrackingEventProcessor.
TrackingTokenParameterResolverFactory	Implementation of a ParameterResolverFactory that resolves the TrackingToken of an event message if that message is a TrackedEventMessage.
WrappedTrackerStatus	Wrapper around an EventTrackerStatus, delegating all calls to a delegate.

Enum Summary

Enum	Description
DirectEventProcessingStrategy	Event processing strategy that directly initiates event processing.
PropagatingErrorHandler	Singleton ErrorHandler implementation that does not do anything.
ReplayStatus	Type that can be used as parameter of Event Handler methods that indicates whether a message is delivered as part of a replay, or in regular operations.
TrackingEventProcessor.State	Enum representing the possible states of the Processor

Exception Summary

Exception	Description
EventProcessingException	Exception thrown when an EventProcessor failed to handle a batch of events.
ResetNotSupportedException	Exception indicating that a reset is not supported by a component.
TransactionMethodExecutionException	Wrapper for exceptions that occurred while calling an @BeforeTransaction or @AfterTransaction annotated method.

Annotation Types Summary

Annotation Type	Description
AllowReplay	Annotation marking a Handler (or class) as being capable of handling replays, or not, depending on the value passed.
ConcludesBatch	Annotation indication that a parameter on an EventHandler method should be injected with a value that informs whether the event is the last event of a processed batch of events.
DisallowReplay	Annotation marking a Handler (or class) as not being able to handle replays
EventHandler	Annotation to be placed on methods that can handle events.
ResetHandler	Annotation that can be placed on a method that is to be invoked when a reset is being prepared.
SequenceNumber	Annotation indicating that a parameter on an Event Handler method should be injected with the SequenceNumber of a DomainEventMessage.
Timestamp	Annotation indication that a parameter on an Event Handler method should be injected with the Timestamp of an Event Message.

Package org.axonframework.eventhandling Description

Classes related to event handling and dispatching, such as Event Listeners and the Event Bus.