September 2008 - rules-users - Jboss List Archives

Re: [rules-users] logging with WorkingMemoryEventListener

by Shyam, Pallav (MSCIBARRA)

You can override the toString method of InputObject to return the type information. ________________________________ From: rules-users-bounces(a)lists.jboss.org To: Rules Users List Sent: Fri Sep 05 22:31:04 2008 Subject: [rules-users] logging with WorkingMemoryEventListener Hello, I want to use WorkingMemoryEventListener and AgendaEventListener for logging. But I have a generic InputObject as fact which has a parameter "type" to disitnguish between different fact types, but all facts are instances of the class InputObject, only the type Paramater has different values. Therefore in the log using DefaultWorkingMemoryEventListener I see only that an Object of class InputObject is inserted but not which type teh Object has. Is it possible to configure the WorkingMemoryEventListener that also the type is logged? Regards Thomas -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error.

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logging with WorkingMemoryEventListener

by thomas kukofka

Hello, I want to use WorkingMemoryEventListener and AgendaEventListener for logging. But I have a generic InputObject as fact which has a parameter "type" to disitnguish between different fact types, but all facts are instances of the class InputObject, only the type Paramater has different values. Therefore in the log using DefaultWorkingMemoryEventListener I see only that an Object of class InputObject is inserted but not which type teh Object has. Is it possible to configure the WorkingMemoryEventListener that also the type is logged? Regards Thomas

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typed dsl variables

by Matt Geis

Hi Pallav, I just started a new gig, so I don't have my drools env all set up, but here are my suggestions to help you to really understand dsl's and build some powerful rules using them. Quick, dirty, but you won't become a guru: 1. Download Drools 5. 2. Use the syntax for typed variables, and use regular expressions in your mapping file. For example, [condition][]{varname:[a-zA-z0-9]+}\s+is\sa\s+Volume\s+where\s+.... 3. Keep in mind that dsl entries are expanded in a rule in the order they are declared in the DSL mapping file. How to really learn it... 1. D/L the source and build. 2. Run your app, but run it through a debugger with breakpoint in the DefaultExpander class, so you can see exactly how pattern matching is going on, and step by step how your mappings transform your rule. The rule below should have 3 mappings, the third one matching in two locations. v1 is a Volume where status is "NV" and sourceId is 2 and volume is 1000 Also, check the blog at http://blog.athico.com/2008/06/allowing-variable-masks-in-dsl-grammar.html, and on the mailing list. I've posted several times in the last couple months on how to solve this very problem using typed DSL variables. --Matt

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Can drools work in multithreaded environment?

by Barath

Hi, While doing a load test with jmeter,my web service application with drools works fine for few clients(5 simultaneous hits for 10 times) but when i increase my clients(120 simultanious hits for 100 times) i am gettin the following exception for few client, (out of 12,000 hits 200 throws this exception) problem encountered at node [11] 5{170,189}: unable to resolve property: null pointer exception in property: declr.identifier org.mvel.TemplateInterpreter.execute(TemplateInterpreter.java:528) org.mvel.TemplateInterpreter.parse(TemplateInterpreter.java:341) org.drools.rule.builder.dialect.java.AbstractJavaBuilder.generatTemplates(AbstractJavaBuilder.java:113) org.drools.rule.builder.dialect.java.JavaConsequenceBuilder.build(JavaConsequenceBuilder.java:95) org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:67) org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:446) org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:304) org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167) com.drools.util.RuleEngine.applyRule(RuleEngine.java:47) com.drools.util.DroolsController.getAdvertisement(DroolsController.java:94) com.drools.util.DroolsController.routeBusinessMethod(DroolsController.java:67) com.drools.util.DroolsController.getAdvertisement(DroolsController.java:43) com.drools.MyEndpoint.getAdvertisement(MyEndpoint.java:237) com.drools.MyEndpoint.process(MyEndpoint.java:144) org.apache.servicemix.common.AsyncBaseLifeCycle.doProcess(AsyncBaseLifeCycle.java:489) org.apache.servicemix.common.AsyncBaseLifeCycle.processExchange(AsyncBaseLifeCycle.java:441) org.apache.servicemix.common.BaseLifeCycle.onMessageExchange(BaseLifeCycle.java:46) org.apache.servicemix.jbi.messaging.DeliveryChannelImpl.processInBound(DeliveryChannelImpl.java:595) org.apache.servicemix.jbi.nmr.flow.AbstractFlow.doRouting(AbstractFlow.java:174) org.apache.servicemix.jbi.nmr.flow.seda.SedaFlow.doRouting(SedaFlow.java:176) org.apache.servicemix.jbi.nmr.flow.seda.SedaQueue$1.run(SedaQueue.java:134) edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:665) edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:690) java.lang.Thread.run(Thread.java:619) drl file has 6 rules, 5 rules - which retract facts which passes the rule. 1 rule(low salience) - will add the fact to java.util.List (set as global) which passes the rule. 1 . Am i getting this error bcoz of the global list? or any other reason? 2 . How to solve this problem? here the rules, <code> global java.util.List feasibleAdv; rule " percentage rule " when $adv : Advertisement( percentageLimit != 0 , percentageLimit < playedPercentage ) then System.out.println("remove this adv (failed percentage): "+$adv.getAdvertisementID()); retract($adv); end rule "per day rule" when $adv : Advertisement( limitperday != 0 , limitperday <= playedperday ) then //System.out.println("remove this adv (failed day): "+$adv.getAdvertisementID()); retract($adv); end rule "per week rule" when $adv : Advertisement( limitperweek != 0 , limitperweek <= playedperweek) then //System.out.println("remove this adv (failed week): "+$adv.getAdvertisementID()); retract($adv); end rule "per month rule" when $adv : Advertisement( limitpermonth != 0 , limitpermonth <= playedpermonth) then //System.out.println("remove this adv (failed month) : "+$adv.getAdvertisementID()); retract($adv); end rule "total played rule" when $adv : Advertisement( totallimit != 0 , totallimit <= totalplayed ) then //System.out.println("remove this adv (failed total played) : "+$adv.getAdvertisementID()); retract($adv); end rule "advertisement select rule" salience -1 when $adv : Advertisement( $playedPercentPerAdvertisement : playedPercentPerAdvertisement) not( Advertisement( playedPercentPerAdvertisement < $playedPercentPerAdvertisement ) ) $advertisementCount : Integer() then boolean status = true; if($advertisementCount-1 < 0){ //System.out.println("halted"); status = false; drools.halt(); } if(status){ feasibleAdv.add($adv); drools.update( drools.getWorkingMemory().getFactHandle($advertisementCount), new Integer($advertisementCount-1) ); retract($adv); } end </code> -- View this message in context: http://www.nabble.com/Can-drools-work-in-multithreaded-environment--tp170... Sent from the drools - user mailing list archive at Nabble.com.

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Drools Boot Camp (Oct 16-21) and Texas Rules Fest goes bigger and better (Oct 22-24)

by Mark Proctor

http://blog.athico.com/2008/09/drools-boot-camp-and-texas-rules-fest.html ------------- Due to large number of registrations the Texas Rules Fest has had to move location from the Addison to the Sheraton Dallas: http://www.rulesfest.org/OctoberRulesFest/Location.html As a reminder entire Drools team will be at the *Dallas Rules Fest*, <http://rulesfest.org/>this October 22nd to 24th. This is a *must attend* non-profit event, with $150 registration fee, for hands on rule training on a variety of products and disciplines with some top industry speakers <http://rulesfestregistration.dallasrulesgroup.org/Speakers> and a fantastic agenda <http://rulesfestregistration.dallasrulesgroup.org/Agenda> - *just stuff, not fluff* ;) Gary Riley will be there, author of the rules "bible" Expert Systems <http://www.allbookstores.com/book/9780534937447/Gary_Riley/Expert_Systems...>, talking about his rule engine the venerable Clips <http://clipsrules.sourceforge.net/>. Charles Forgy, the inventor of Rete and "father" of rule engines, will be there talking about his break through research in parallel executing rule engines. Daniel Selman from Ilog will be there giving tutorials on the ilog engine and tooling. The organisers have asked me to remind everyone thinking of going to register <http://www.rulesfest.org/OctoberRulesFest/Register.html> sooner, rather than later, as they may actually sell out if the rate of registrations continues. Come Join the Week Long Drools Boot Camp The Drools team will actually be arriving the week before, on the 15th, for our team meeting which is open to all and starts official on the the 16th in the Best Western hotel <http://book.bestwestern.com/bestwestern/productInfo.do?propertyCode=44540> conference room. So if you want to chat rules in general or specifically on your problems, or just get involved in some hard core programming, please do come along. We will be staying at the Best Western hotel <http://book.bestwestern.com/bestwestern/productInfo.do?propertyCode=44540> which has rooms from just $69USD per night :) So far we have Franklin America <https://www.franklinamerican.com/> and German Aerospace <http://www.dlr.de/en/> joining us for the team meeting and hard core Drools coding, still room for more :)

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FW: [rules-users] Variable assignment in DSL

by Shyam, Pallav (MSCIBARRA)

Hi Matt, Going by the below example I have come across a senario which seems like a bug to me. Here is my dsl [condition][]{varname} is a Volume where {constraints}={varname} : RawVolumeTs ( where {constraints} ) [condition][]where {attr} is "{value}"={attr} == "{value}" [condition][]and {attr} is {value}=, {attr} == {value} Now, v1 is a Volume where status is "NV" and sourceId is 2 Translates to v1 : RawVolumeTs (status == "NV", sourceId == 2 ) Only when I put an extra space after and. Otherwise the ending quote of "NV" get cut-off resulting in v1 : RawVolumeTs (status == "NV, sourceId == 2 ) Also v1 is a Volume where status is "NV" and sourceId is 2 and volume is 1000 Give a totally incorrect drl v1 : RawVolumeTs (status == "NV", sourceId == 2 and volume is 1000 ) Thanks Pallav -----Original Message----- From: Shyam, Pallav (MSCIBARRA) Sent: Wednesday, September 03, 2008 11:55 PM To: 'Matt Geis' Subject: RE: [rules-users] Variable assignment in DSL Great. This is really exiting. Thanks, Pallav -----Original Message----- From: Matt Geis [mailto:mgeis@yahoo.com] Sent: Wednesday, September 03, 2008 11:24 PM To: rules-users(a)lists.jboss.org Cc: Shyam, Pallav (MSCIBARRA) Subject: Re: [rules-users] Variable assignment in DSL how about changing the first line of your DSL map to... [condition][]{varname} is a Volume where {constraints} = {varname} : RawVolumeTs (where {constraints} ) That way, your DSL would read... rule "RT(2) against FT(32)" when V1 is a Volume where status is "NA" and sourceId is "ABC" V2 is a Volume where status is "NA" and sourceId is "XYZ" then end and the resulting DRL would read... rule "RT(2) against FT(32)" when V1 : RawVolumeTs (status == "NA", sourceId == "ABC") V2 : RawVolumeTs (status == "NA", sourceId == "XYZ") then End -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error.

17 years, 10 months

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Re: [rules-users] Variable assignment in DSL

by Matt Geis

how about changing the first line of your DSL map to... [condition][]{varname} is a Volume where {constraints} = {varname} : RawVolumeTs (where {constraints} ) That way, your DSL would read... rule "RT(2) against FT(32)" when V1 is a Volume where status is "NA" and sourceId is "ABC" V2 is a Volume where status is "NA" and sourceId is "XYZ" then end and the resulting DRL would read... rule "RT(2) against FT(32)" when V1 : RawVolumeTs (status == "NA", sourceId == "ABC") V2 : RawVolumeTs (status == "NA", sourceId == "XYZ") then End

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FW: [rules-users] Variable assignment in DSL

by Shyam, Pallav (MSCIBARRA)

I have a DSL [condition][]There is a Volume where {constraints}=v : RawVolumeTs ( where {constraints} ) [condition][]where {attr} is "{value}"={attr} == "{value}" [condition][]and {attr} is "{value}"=, {attr} == "{value}" And here is my business rule using the above dsl(the dslr file) dialect "java" expander volume.dsl rule "RT(2) against FT(32)" when There is a Volume where status is "NA" and sourceId is "ABC" There is a Volume where status is "NA" and sourceId is "XYZ" then end And here is the translated DRL dialect "java" rule "RT(2) against FT(32)" when v : RawVolumeTs (status == "NA", sourceId == "ABC") v : RawVolumeTs (status == "NA", sourceId == "XYZ") then End In the above example both the instances of RawVolumeTs as assigned to variable v. How do I write a dsl that each of these RawVolumeTs instances get assigned to different variables. For example: The first statement -- There is a Volume where status is "NA" and sourceId is "ABC" -- should assign it to variable V1 And the second statement -- There is a Volume where status is "NA" and sourceId is "XYZ" -- should assign it to variable V2. Pallav -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error.

17 years, 10 months

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Re: Ruleflow-group attribute causing rule to not fire

by Roger Tanuatmadja

> From: "Roger Tanuatmadja" <rogerst(a)gmail.com> > To: rules-users(a)lists.jboss.org > Date: Mon, 19 May 2008 11:55:19 -0700 > Subject: Ruleflow-group attribute causing rule to not fire > Hi, > > I am new to both rules engine and Drools. I am currently evaluating Drools > 4.0.7 for use in our new project. > Basically I have been writing a bunch of individual rules and things have > been fine, the rules that I expected to fire were fired, etc, etc. I then > proceeded to investigate rule flows. I started innocently enough i.e. adding > the ruleflow-group attribute to some of my rules. I also defined a ruleflow > mapping (.rfm). > > I then reran my unit-tests (WITHOUT reading the rules in as rule flows) and > some of my rules were no longer firing!!. I added an Agenda Listener to my > code and > 1. without the ruleflow-group attribute, activations were created, and > fired. > 2. with the ruleflow-group attribute, activations were created but not > fired. > > Using the debugger yielded the same logical outcomes i.e. without the > ruleflow-group attribute, my breakpoints were hit, but with the attribute > specified, none of my breakpoints were hit. > > My question is: Is this behavior expected? And why? Especially since some > other rules (with the attribute specified) continued to work. I've read the > documentations as much as possible, but I am really new to this field so I > might not even know what questions to ask either. > > Any help would be greatly appreciated. > > Thanks, > > Roger > > > >

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Update property

by tommmyknocker

I have a basic problem that I don't understand, it's obviously an error from me. I use drools 4.0.7. My application creates bills and makes reduces on it. I use a ruleflow that executes rules named "REMISE_IMMEDIATE" first and "REMISE_TICKET" after. Example of 2 rules : rule "ID_150_TEST" ruleflow-group "REMISE_IMMEDIATE" when r : Regle (numRegle == "1"); a : Article (regles contains r); t : TicketCaisse( ); l : LigneTicket($n : numeroLigne, $q : quantiteTotal,ticket == t && quantiteTotal > 0 && article==a && remiseChoisie == true); then System.out.println("test 1 : " + t.getTotalTicket()); t.setTotalTicket( 80 ); end rule "ID_150_TEST_C" ruleflow-group "REMISE_DIFFEREE" when t : TicketCaisse(totalTicket >= (new Double(100.0)) && totalTicket <= (new Double(200.0))); then System.out.println("test 2 : " + t.getTotalTicket()); IAvantageTicket newAvtgTicket = t.addAvantageTicket("BAT", 2, 20.0, t.getNumeroMagasin()); end Here is my case : A bill (ticket in french) has an amount of 100. A reduction should set this amount at 80 with the first rule An advantage shouldn't be given on the Object Ticket because of the condition totalTicket >= (new Double(100.0)) && totalTicket <= (new Double(200.0)) Result : The second rule give the advantage on the Object Ticket and the System.out.println"test 2 : " + t.getTotalTicket()); give 80 !!! I run my JUNIT test with the Debug mode in Eclipse and the object TicketCaisse in the working memory has an amount of 80. So I don't understand why the second rule has been executed... I try to do update(t); in the first rule but it doesn't work. Has someone any idea ? I join the pojo TicketCaisse. http://www.nabble.com/file/p19290828/TicketCaisse.java TicketCaisse.java -- View this message in context: http://www.nabble.com/Update-property-tp19290828p19290828.html Sent from the drools - user mailing list archive at Nabble.com.

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rules-users September 2008