Hello, I am fairly new to Drools and tried my first steps with Drools Fusion and was running into the following problem: According to the Drools Fusion User Guide Version 5.4.0.Final on page 32 the following pattern should work and select events in between the last 10 minutes: ... StockTick() over window:time( 2m ) ... I tried the following example, simulating RHQ EventComposite Events with a simple Junit test: ... KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(new ClassPathResource("rhqrules.drl", getClass()), ResourceType.DRL); KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); config.setOption(EventProcessingOption.STREAM); nowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); KnowledgeSessionConfiguration conf = KnowledgeBaseFactory.newKnowledgeSessionConfiguration(); conf.setOption(ClockTypeOption.get("pseudo")); ksession = kbase.newStatefulKnowledgeSession(conf, null); ... inside the test method: ... For-Loop inserts new Events and increases the pseudo clock in one minute steps: ... for (int i = 0; i < 100; i++) { timestamp = clock.advanceTime(1, TimeUnit.MINUTES); ksession.insert(new EventComposite("EventDetail" + i, resourceId, "resourceName" + i, "resourceAncestry" + i, resourceTypeId, eventId, severity, "sourceLocation" + i, timestamp)); } ... ksession.fireAllRules(); ... The .drl definition should fire only events of the last 10 minutes, however all inserted 100 events are fired: declare EventComposite @role( event ) end rule "Rule1 events in between last 10 minutes" when $event : EventComposite() over window:time( 10m ) then System.out.println("Event in between the last 10 minutes:: " + $event); end On the other hand this rule works as expected and selects only events older than 10 minutes: rule "Rule2 events not in between the last 10 minutes" when $eventA : EventComposite( ) not EventComposite( this.resourceId == $eventA.resourceId ) over window:time( 10m ) then System.out.println("Event not in between the last 10 minutes: " + $eventA); end My question is: What did I wrong in the definition of Rule-1, what is the correct statement for finding the last 10 minutes events? Background information: I am doing some research on implementing using the drools framework inside the RHQ framework for complex event processing. I would like to show that this is possible and could be uses reasonable for RHQ event processing. Any help is highly appreceated! Thanks and kind regards Bernhard _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hello Wolfgang, thanks for the answer. Does that mean the description on page 32 of the Drools Fusion User Guide is not correct?

"... 2.6.1. Sliding Time Windows Sliding Time Windows allow the user to write rules that will only match events occurring in the last X time units. For instance, if the user wants to consider only the Stock Ticks that happened in the last 2 minutes, the pattern would look like this: StockTick() over window:time( 2m ) Drools uses the "over" keyword to associate windows to patterns. ..."

Do you know a way for my simulation to get only the latest events in between 10 minutes? Do I need an additional constraint for the rule?

Thanks, Bernhard -----Ursprüngliche Nachricht----- Von: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] Im Auftrag von Wolfgang Laun Gesendet: Montag, 28. Mai 2012 15:11 An: Rules Users List Betreff: Re: [rules-users] Time Sliding Window Question Whenever you insert an event, a simple rule like ruel x when Event() over window:time(x) then...end immediately results in an activation. Your for loop merely postpones firings. A selection of an event due to a window:time() is different from a selection due to a constraint. The latter may result in cancelling the activation if the fact is modified accordingly. But there's no reevaluation due to the passage of time. -W On 28/05/2012, Bernhard Unger <mail(a)bernhardunger.de&gt; wrote: > Hello, > > I am fairly new to Drools and tried my first steps with Drools Fusion and > was running into the following problem: > > According to the Drools Fusion User Guide Version 5.4.0.Final on page 32 > the > following pattern should work and select events in between the last 10 > minutes: > ... > StockTick() over window:time( 2m ) > ... > I tried the following example, simulating RHQ EventComposite Events with a > simple Junit test: > > ... > KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); > kbuilder.add(new ClassPathResource("rhqrules.drl", getClass()), > ResourceType.DRL); > KnowledgeBaseConfiguration config = > KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); > config.setOption(EventProcessingOption.STREAM); > nowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(config); > kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); > KnowledgeSessionConfiguration conf = > KnowledgeBaseFactory.newKnowledgeSessionConfiguration(); > conf.setOption(ClockTypeOption.get("pseudo")); > ksession = kbase.newStatefulKnowledgeSession(conf, null); > ... > inside the test method: > ... > For-Loop inserts new Events and increases the pseudo clock in one minute > steps: > ... > for (int i = 0; i < 100; i++) { > timestamp = clock.advanceTime(1, TimeUnit.MINUTES); > ksession.insert(new EventComposite("EventDetail" + i, resourceId, > "resourceName" + i, "resourceAncestry" + i, resourceTypeId, > eventId, severity, "sourceLocation" + i, timestamp)); > } > ... > ksession.fireAllRules(); > ... > > The .drl definition should fire only events of the last 10 minutes, however > all inserted 100 events are fired: > declare EventComposite > @role( event ) > end > rule "Rule1 events in between last 10 minutes" > when > $event : EventComposite() over window:time( 10m ) > then > System.out.println("Event in between the last 10 minutes:: " + $event); > end > > On the other hand this rule works as expected and selects only events older > than 10 minutes: > > rule "Rule2 events not in between the last 10 minutes" > when > $eventA : EventComposite( ) > not EventComposite( this.resourceId == $eventA.resourceId ) over > window:time( 10m ) > > then > System.out.println("Event not in between the last 10 minutes: " + > $eventA); > end > > > My question is: > What did I wrong in the definition of Rule-1, what is the correct statement > for finding the last 10 minutes events? > > Background information: > I am doing some research on implementing using the drools framework inside > the RHQ framework for complex event processing. I would like to show that > this is possible and could be uses reasonable for RHQ event processing. > > Any help is highly appreceated! > > Thanks and kind regards > > Bernhard > > > > > > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users