[rules-users] lock-on-active clarification needed

[Esteban Aliverti]

Hi all,
I'm dealing with a set of rules having the lock-on-active attribute and I'm
not getting the (at least what I understand as) expected results.

I've created an isolated JUnit test. I'm attaching it to this email.

Basically, I have 2 rules:


rule "init"
lock-on-active true
when
    $d: DataSample()
then
    System.out.println("Setting predefined value");
    modify($d){
        addValue(Parameter.PARAM_A, 10.0)
    }
end

rule "Rule 1"
lock-on-active true
when
    DataSample($v: values[Parameter.PARAM_A] < 20)
then
    System.out.println("Rule 1: "+$v);
end


DataSample is a Java class containing a Map<Parameter, Double> where
Parameter is an enum.
In the test I'm creating a ksession and inserting an empty DataSample
object.
I understand that as soon as the object is inserted, both rules are
evaluated and the result is going to be an activation of rule "init"; and
this is what is actually happening. So far so good.
Now, after I call fireAllRules() I expect that 'Rule 1' becomes active
because of the modification of the fact in "init". Well, this is not the
case. I don't see any activation for "Rule 1".
My understanding about lock-on-active is that a rule that WAS ACTIVATED is
not going to be re-activated until the current agenda group is switched.
The odd thing here is that I never had an activation for "Rule 1" so I
don't see why it activation after "init" is executed should be prevented.
So my question is: Is my understanding wrong? What is the expected behavior
of lock-on-active in this situation? I read the documentation but I
couldn't get any hint:

"

Whenever a ruleflow-group becomes active or an agenda-group receives the
focus, any rule within that group that has lock-on-active set to true* will
not be activated any more*; irrespective of the origin of the update, the
activation of a matching rule is discarded. This is a stronger version of
no-loop, because the change could now be caused not only by the rule
itself. It's ideal for calculation rules where you have a number of rules
that modify a fact and you don't want any rule re-matching and firing
again. Only when the ruleflow-group is no longer active or the agenda-group
loses the focus those rules with lock-on-active set to true become eligible
again for their activations to be placed onto the agenda."

Best Regards,


XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Blog @ http://ilesteban.wordpress.com
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.jboss.org/pipermail/rules-users/attachments/20121114/442a9006/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: RuleNotBeingFired.zip
Type: application/zip
Size: 6529 bytes
Desc: not available
Url : http://lists.jboss.org/pipermail/rules-users/attachments/20121114/442a9006/attachment.zip