Reto,
I think this is because you don't notify the engine when the DroolsTimer
object has been changed (using update). You should always notify the engine
of any state changes (using update(..) if your rules depend on this state).
Otherwise the engine will assume the state is still the same and won't
re-evaluate the rules.
Kris
----- Original Message -----
From: "retoy" <reto.lamprecht(a)allianz-suisse.ch>
To: <rules-users(a)lists.jboss.org>
Sent: Monday, July 26, 2010 2:26 PM
Subject: Re: [rules-users] how to access process variables within wait
statenode timers?
Kris,
Thanks a lot!
It's true that I do have access to process variables if I assign them
already when I'm starting the process (passing the value as a parameter of
the startProcess() method).
In my first code sample above, I assigned the timer variable only in an
OnEntry action of the wait state node, which had no effect... (Maybe this
is
only true for version 5.0 (?))
But anyway my timer with a variable delay still doesn't work as I
expected:
The process stays in the wait state until my application terminates,
although the constraint condition is met after 3 seconds (I print it out
each time the timer fires). So it looks as if the constraint condition is
not continuously evaluated... although I'm calling
context.getProcessInstance().getWorkingMemory().fireAllRules() after every
update... do you see a reason for that in this updated small code sample?
http://drools-java-rules-engine.46999.n3.nabble.com/file/n996108/demo.var...
demo.variableTimer.v2.zip
It's interesting that if I don't insert the timer variable into the
working
memory, the timer even continues firing after my application terminated
(since the constraint is never true and the process stays in the wait
state)... So inserting it does have some kind of effect on the evaluation
of
the constraint, simply not immediately.
Reto
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