com.espertech.esper.pattern.observer

Class TimerScheduleObserver

java.lang.Object

com.espertech.esper.pattern.observer.TimerScheduleObserver

All Implemented Interfaces:

EventObserver, ScheduleHandleCallback

public class TimerScheduleObserver
extends Object
implements EventObserver, ScheduleHandleCallback

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

Field Summary

Fields

Modifier and Type	Field and Description
protected long	anchorRemainder
protected Calendar	anchorTime
protected MatchedEventMap	beginState
protected boolean	isTimerActive
protected ObserverEventEvaluator	observerEventEvaluator
protected EPStatementHandleCallback	scheduleHandle
protected long	scheduleSlot

Constructor Summary

Constructors

Constructor and Description
TimerScheduleObserver(TimerScheduleSpec spec, MatchedEventMap beginState, ObserverEventEvaluator observerEventEvaluator, boolean isFilterChildNonQuitting)

Method Summary

Modifier and Type	Method and Description
void	accept(EventObserverVisitor visitor)
MatchedEventMap	getBeginState()
void	scheduledTrigger(EngineLevelExtensionServicesContext engineLevelExtensionServicesContext) 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

Field Detail

scheduleSlot

protected final long scheduleSlot

beginState

protected MatchedEventMap beginState

observerEventEvaluator

protected final ObserverEventEvaluator observerEventEvaluator

anchorTime

protected Calendar anchorTime

anchorRemainder

protected long anchorRemainder

isTimerActive

protected boolean isTimerActive

scheduleHandle

protected EPStatementHandleCallback scheduleHandle

Constructor Detail

TimerScheduleObserver

public TimerScheduleObserver(TimerScheduleSpec spec,
                             MatchedEventMap beginState,
                             ObserverEventEvaluator observerEventEvaluator,
                             boolean isFilterChildNonQuitting)

Method Detail

getBeginState

public MatchedEventMap getBeginState()

Specified by:

getBeginState in interface EventObserver

scheduledTrigger

public final void scheduledTrigger(EngineLevelExtensionServicesContext engineLevelExtensionServicesContext)

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:

engineLevelExtensionServicesContext - 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