i'm developing a java application using drools 4 for domotic control;

i ve implemented a listener on my working memory with the method afterActivationFired(...) and activationCancelled(...) .

At startup of my app i've write the following lines:

listener = new FiredRulesListener();

workingMemory.addEventListener(listener);

Each time a rule is fired the method afterActivationFired(...) is called and it is ok; but when the rule stop to be true the method activationCancelled isn't never called.

I try to be more clear:

i 've the following rule:

System.out.println("light 1 on");

When i turn on the light 1 the method afterActivationFired(...) is called, but when i turn off the light the method activationCancelled isn't called.

Can someboy help me??

public
static class FiredRulesListener extends DefaultAgendaEventListener

{

List<Rule>

firedRules = new ArrayList<Rule>();

public
List<Rule> getFiredRules()

{

return
this.firedRules;

}

@Override

public
void afterActivationFired(AfterActivationFiredEvent event, WorkingMemory workingMemory)

{

Rule rule = event.getActivation().getRule();

if
(!this.firedRules.contains(rule))

this.firedRules.add(rule);

}

@Override

public
void activationCancelled (ActivationCancelledEvent event, WorkingMemory workingMemory)

{

System.out.println("i never see this message");

Rule rule= event.getActivation().getRule();

this.firedRules.remove(rule);

}