com.espertech.esper.pattern.observer

Class TimerIntervalObserverFactory

java.lang.Object

com.espertech.esper.pattern.observer.TimerIntervalObserverFactory

All Implemented Interfaces:

ObserverFactory, MetaDefItem, Serializable

public class TimerIntervalObserverFactory
extends Object
implements ObserverFactory, MetaDefItem, Serializable

Factory for making observer instances.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected MatchedEventConvertor	convertor Convertor to events-per-stream.
protected ExprNode	parameter Parameters.

Constructor Summary

Constructors

Constructor and Description
TimerIntervalObserverFactory()

Method Summary

Modifier and Type	Method and Description
long	computeDelta(MatchedEventMap beginState, PatternAgentInstanceContext context)
boolean	isNonRestarting()
EventObserver	makeObserver(PatternAgentInstanceContext context, MatchedEventMap beginState, ObserverEventEvaluator observerEventEvaluator, EvalStateNodeNumber stateNodeId, Object observerState, boolean isFilterChildNonQuitting) Make an observer instance.
void	setObserverParameters(List<ExprNode> parameters, MatchedEventConvertor convertor, ExprValidationContext validationContext) Sets the observer object parameters.

Methods inherited from class java.lang.Object

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

Field Detail

parameter

protected ExprNode parameter

Parameters.

convertor

protected transient MatchedEventConvertor convertor

Convertor to events-per-stream.

Constructor Detail

TimerIntervalObserverFactory

public TimerIntervalObserverFactory()

Method Detail

setObserverParameters

public void setObserverParameters(List<ExprNode> parameters,
                                  MatchedEventConvertor convertor,
                                  ExprValidationContext validationContext)
                           throws ObserverParameterException

Description copied from interface: ObserverFactory

Sets the observer object parameters.

Specified by:

setObserverParameters in interface ObserverFactory

Parameters:

parameters - is a list of parameters

convertor - for converting partial pattern matches to event-per-stream for expressions

validationContext - context

Throws:

ObserverParameterException - thrown to indicate a parameter problem

computeDelta

public long computeDelta(MatchedEventMap beginState,
                         PatternAgentInstanceContext context)

makeObserver

public EventObserver makeObserver(PatternAgentInstanceContext context,
                                  MatchedEventMap beginState,
                                  ObserverEventEvaluator observerEventEvaluator,
                                  EvalStateNodeNumber stateNodeId,
                                  Object observerState,
                                  boolean isFilterChildNonQuitting)

Description copied from interface: ObserverFactory

Make an observer instance.

Specified by:

makeObserver in interface ObserverFactory

Parameters:

context - - services that may be required by observer implementation

beginState - - start state for observer

observerEventEvaluator - - receiver for events observed

stateNodeId - - optional id for the associated pattern state node

observerState - - state node for observer

isFilterChildNonQuitting - true for non-quitting filter

Returns:

observer instance

isNonRestarting

public boolean isNonRestarting()

Specified by:

isNonRestarting in interface ObserverFactory