Re: [rules-users] How to Capture the rule which does not get executed
You could store all rules in a global and remove those that execute in an
AgendaEventListener's activtionCreated event (re-adding those that get
retracted by Truth Maintenance in the AgendaEventListeners
activationCancelled event).
//Loads rules
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource("myrules.drl"),
ResourceType.DRL);
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
Collection<KnowledgePackage> kpackages = kbuilder.getKnowledgePackages();
kbase.addKnowledgePackages(kpackages);
//Get all rules
for(KnowledgePackage kpackage : kpackages) {
for(Rule rule : kpackage.getRules()) {
myGlobal.add(rule);
}
}
//The usual suspects
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
ksession.addEventListener(new DefaultAgendaEventListener() {
@Override
void activationCreated(ActivationCreatedEvent event) {
myGlobal.remove(event.getActivation().getRule());
}
@Override
void activationCancelled(ActivationCancelledEvent event) {
myGlobal.add(event.getActivation().getRule());
}
});
ksession.fireAllRules();
You could also use an AgendaEventListener to better manage the contents of
the Rule collection for more complex scenarios where Truth Maintenance could
retract an activation - that the simpler solution above wold
2010/10/13 Navdeep Kumar <nkumar(a)objectwave.com>
Hi All,
I am new to Drools. I am working on a project where nature of rules are
dynamic. I want to capture that rule which does not get executed. i need to
store that rule because i have to display that rule in the UI.
Here is my rule file
rule "FrontAxle:Capacity|FrontSuspension:Capacity"
when
b:Feature(featureClass.name=="FrontSuspension")
c:Feature(featureClass.name=="FrontAxle")
//eval(b.getCapacity() >= c.getCapacity())
then
System.out.println("These are compatible");
System.out.println(b.getFeatureClass().getName());
availablity.put(b.getFeatureClass().getName()+"-"+c.getFeatureClass().getName(),"12.35");
//availablity.put(b.getName()+"-"+c.getName(),new Double(b.getCapacity()));
insert(availablity);
end
rule "FrontSuspension:Type|FrontAxle:Type"
when
b:Feature(featureClass.name=="FrontSuspension")
c:Feature(featureClass.name=="FrontAxle")
not Feature(b.attributes.Type=="I Beam" &&
c.attributes.Type=="Multi Link
Air")
//NOT (FrontAxle.type = "I-Beam" AND FrontSuspension.type = "Multi-link
Air") - mounting restriction
then
System.out.println("I am in 2");
end
rule "FrontAxle:FeatureCode|FrontSuspension:Type"
when
b:Feature(featureClass.name=="FrontSuspension")
Feature(featureClass.name=="FrontAxle" && code=="002ASW")and
not
Feature(b.attributes.Type=="Multi Link Air" ||
b.attributes.Type=="Monoleaf
Spring")
//FrontAxle.featureCode = "002ASW" AND NOT (FrontSuspension.type =
"Multi-link Air" OR FrontSuspension.type = "Monoleaf Spring")
then
System.out.println("I am in 3");
end
now if these two objects named FrontAxle and FrontSuspension are compatible
then it has to meet all the 3 rules, but if any combination of these objects
does not meet one of the rule listed above then i have to store the rule for
the displaying purpose that this combination didn't meet this rule thats why
they are not compatible. any kind of help will be appreciated.
Thanks.
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