It's been a while since I had time to investigate this problem.

I followed your advice and hooked up the DebugAgendaEventListener to my
workingMemory instance.

This clearly shows, that my activations are created but never canceled. So
at least it is consistent with what I'm observing in my application.

But before I start even considering it being a bug (I'm quite sure it is
not), maybe it's better to understand what is happening in my code:

I think that I nailed my problem down to an issue with my fact IDs:

If I have, for example, a real world value (lets say a temperature) that is
connected to a java bean, my understanding is, that the fact ID of this
value inside the workingMemory should not change, even if I change the real
world value (temperature rises)(and thus the java beans value).
In fact the change is propagated to the working memory (as I call
"firePropertyChange" inside my bean), but a NEW rule is activated by the
changed fact, having a DIFFERENT fact ID!

I'm quite sure that this is the reason for my problem with the missing
cancellations. I'd assume that for a rule to be canceled the fact with the
CORRECT fact ID would have to be changed.

Now, in my application, it seems that every modification creates a NEW fact
inside the working memory (which is of course not, what I want).

I had the hope, that calling the firePropertyChange from inside the beans
"setters" would notify the working memory automatically about the correct
fact-ID.

I checked my "equals()" and "hashCode()" methods but the hash code is always
constant and equals is correspondingly true. I also checked that I don't
accidentally re-assert the fact on modification.

So what I don't understand is WHY the working memory thinks that the fact ID
has changed...

See you,

fermion
--
View this message in context: http://www.nabble.com/activationCancelled%28%29-not-being-executed--tf4348054.html#a13158335
Sent from the drools - user mailing list archive at Nabble.com.

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users