com.espertech.esper.pattern.observer
Class TimerAtObserver

java.lang.Object
  com.espertech.esper.pattern.observer.TimerAtObserver

All Implemented Interfaces:

EventObserver, ScheduleHandleCallback

public class TimerAtObserver
extends java.lang.Object
implements EventObserver, ScheduleHandleCallback

Observer implementation for indicating that a certain time arrived, similar to "crontab".

Constructor Summary

TimerAtObserver(ScheduleSpec scheduleSpec, MatchedEventMap beginState, ObserverEventEvaluator observerEventEvaluator)
Ctor.

Method Summary

void	accept(EventObserverVisitor visitor)
MatchedEventMap	getBeginState()
void	scheduledTrigger(ExtensionServicesContext extensionServicesContext) Callback that is invoked as indicated by a schedule added to the scheduling service.
void	startObserve() Start observing.
void	stopObserve() Stop observing.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimerAtObserver

public TimerAtObserver(ScheduleSpec scheduleSpec,
                       MatchedEventMap beginState,
                       ObserverEventEvaluator observerEventEvaluator)

Ctor.

Parameters:

scheduleSpec - - specification containing the crontab schedule

beginState - - start state

observerEventEvaluator - - receiver for events

Method Detail

getBeginState

public MatchedEventMap getBeginState()

Specified by:

getBeginState in interface EventObserver

scheduledTrigger

public final void scheduledTrigger(ExtensionServicesContext extensionServicesContext)

Description copied from interface: ScheduleHandleCallback

Callback that is invoked as indicated by a schedule added to the scheduling service.

Specified by:

scheduledTrigger in interface ScheduleHandleCallback

Parameters:

extensionServicesContext - is a marker interface for providing custom extension services passed to the triggered class

startObserve

public void startObserve()

Description copied from interface: EventObserver

Start observing.

Specified by:

startObserve in interface EventObserver

stopObserve

public void stopObserve()

Description copied from interface: EventObserver

Stop observing.

Specified by:

stopObserve in interface EventObserver

accept

public void accept(EventObserverVisitor visitor)

Specified by:

accept in interface EventObserver