Package org.apache.lens.server.api.events

Interface Summary

Interface	Description
LensEventListener<T extends LensEvent>	The handler method should not block so that the event service can proceed to notifying other listeners as soon as possible.
LensEventService	Singleton which is responsible for managing the event-listener mapping as well as processing events.

Class Summary

Class	Description
AsyncEventListener<T extends LensEvent>	Event listeners should implement this class if they wish to process events asynchronously.
LensEvent	Instantiates a new lens event.
SchedulerAlarmEvent	This event is triggered by the AlarmService whenever a scheduled query needs to be scheduled.

Enum Summary

Enum	Description
SchedulerAlarmEvent.EventType	Event type to know what kind of operations we want.