org.thales.punch.libraries.punchlang.operator

Class LastEventOperator

java.lang.Object

org.thales.punch.libraries.punchlang.operator.LastEventOperator

public class LastEventOperator
extends Object

The LastEventOperator helps you detect that something (or nothing) happened in a time interval.

 
 class MyPunchlet extends Punchlet {
   LastEventOperator lastEvent = new LastEventOperator();;
   public void execute(Tuple root) {
     ...
     if (!lastEvent.markedSince(TimeUnit.SECONDS, 5)) {
       // the last 'mark' did not occur in the last 5 seconds
       // you may want to do something ...
     }
     ...
     {
       lastEvent.mark();
     }
   }
 }
 
 

Constructor Summary

Constructors

Constructor and Description
LastEventOperator() Create a new operator

Method Summary

Modifier and Type	Method and Description
void	mark() Signal the occurrence of an event.
boolean	markedSince(TimeUnit unit, long value) Check if the last event was marked occurred in given interval

Methods inherited from class java.lang.Object

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

Constructor Detail

LastEventOperator

public LastEventOperator()

Create a new operator

Method Detail

mark

public void mark()

Signal the occurrence of an event.

markedSince

public boolean markedSince(TimeUnit unit,
                           long value)

Check if the last event was marked occurred in given interval

Parameters:

unit - the time unit used to format the value parameter

value - the time interval, expressed according to the TimeUnit parameter

Returns:

true or false