# Package org.activiti.engine.delegate.event

- Interface Summary
  Interface | Description
  --- | ---
  ActivitiActivityCancelledEvent | An `ActivitiEvent` related to cancel event being sent to an activity.
  ActivitiActivityEvent | An `ActivitiEvent` related to an activity within an execution;
  ActivitiCancelledEvent | An `ActivitiEvent` related to cancel event being sent when activiti object is cancelled.
  ActivitiEntityEvent | An `ActivitiEvent` related to a single entity.
  ActivitiEntityWithVariablesEvent | An `ActivitiEntityEvent` related to a single entity.
  ActivitiErrorEvent | An `ActivitiEvent` related to an error being sent to an activity.
  ActivitiEvent | Describes an event that occurred in the Activiti Engine which is dispatched to external listeners, if any.
  ActivitiEventDispatcher | Dispatcher which allows for adding and removing `ActivitiEventListener`s to the Activiti Engine as well as dispatching `ActivitiEvent` to all the listeners registered.
  ActivitiEventListener | Describes a class that listens for `ActivitiEvent`s dispatched by the engine.
  ActivitiExceptionEvent | Indicates the `ActivitiEvent` also contains information about a `Throwable` that occurred, triggering the event.
  ActivitiMembershipEvent | An event related to group memberships.
  ActivitiMessageEvent | An `ActivitiEvent` related to an message being sent to an activity.
  ActivitiProcessStartedEvent | An `ActivitiEvent` related to start event being sent when activiti process instance is started.
  ActivitiSequenceFlowTakenEvent | An `ActivitiEvent` that indicates a certain sequence flow has been taken.
  ActivitiSignalEvent | An `ActivitiEvent` related to a signal being sent to an activity.
  ActivitiVariableEvent | An `ActivitiEvent` related to a single variable.

- Class Summary
  Class | Description
  --- | ---
  BaseEntityEventListener | Base event listener that can be used when implementing an `ActivitiEventListener` to get notified when an entity is created, updated, deleted or if another entity-related event occurs.

- Enum Summary
  Enum | Description
  --- | ---
  ActivitiEventType | Enumeration containing all possible types of `ActivitiEvent`s.

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