June 2011 - rules-users - Jboss List Archives

How to Access and Execute Rules from Database

by Ashish Soni

Hi All , I am able to configure oracle database in drools but now i am not able to find how can i load rules from the DB and execute them , I gone through the documentation but not able to get much information or might be i am missing something. If any one can provide me a example or some pointer ,hints then it would be helpful. Regards, Ashish

12 years, 9 months

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Drools with Spring - Need Help

by anilkapoor

my spring config file is: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:drools="http://drools.org/schema/drools-spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://drools.org/schema/drools-spring http://drools.org/schema/drools-spring.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <drools:kbase id="kBase"> <drools:resources> <drools:resource type="DRL" source="classpath:META-INF/rules/myproject-rules.drl" /> </drools:resources> </drools:kbase> <drools:ksession id="kSession" type="stateful" kbase="kBase"></drools:ksession> </beans> rule is: import..... global EligibilityResult eligibilityResult; rule "Customer State Check - ACTIVATED" when SeHolder(seHolderState.state == "ACT") then eligibilityResult = new EligibilityResult(); eligibilityResult.setEligible(true); insert(eligibilityResult); end java code @Resource StatefulKnowledgeSession kSession; @Override public SeHolder checkCustomerEligible(String seId) { EligibilityResult eligibilityResult = new EligibilityResult(); SeHolder seHolder = new SeHolder();//seHolderManagement.getSEHolder(seId); seHolder.setId("test0002"); seHolder.setSeHolderState(SeHolderState.SUSPENDED); kSession.insert(seHolder); kSession.fireAllRules(); Object objs[]= kSession.getObjects().toArray(); for (int i = 0; i < objs.length; i++) { eligibilityResult = (EligibilityResult) ((objs[i] instanceof EligibilityResult)?objs[i]:null); } System.out.println("----- EligibilityResult ----- " + eligibilityResult.isEligible()); kSession.dispose(); return seHolder; } NOW MY QUESTION IS THAT I AM GETTING THE EligibilityResult LIKE SHOWN IN ABOVE CODE.. CAN ANYBODY TELL ME IS THERE ANY OTHER SUFFICIENT WAY SO THAT I CAN GET IT BY NAME OR SOME OTHER WAY. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-with-Spring-Need-Help-tp3115948p... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 9 months

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drools - packaging creates a full snapshot...why?

by jcrowe

I have been using drools for almost a year now and build several packages a day. Things are starting to slow down a bit and I've started to wonder if it is because of all the workspace copies and the jcr overhead of them. I have implemented a deletion of old workspace copies but this made me wonder why drools is doing (in RulesRepository): this.session.getWorkspace().copy( source, newName ); its not like i need a copy, once the package is built, it doesn't seem to 'rebuild it' from this snapshot. I have no way of "recovering to" this snapshot. Anyone can help me with the reason behind the copy (perhaps why I shouldn't just delete this copy? I'm sure there are side-effects of this I'm not thinking of, etc., etc.,) Any feedback is appreciated. -- View this message in context: http://drools.46999.n3.nabble.com/drools-packaging-creates-a-full-snapsho... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 9 months

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Common Practices for warning or debug rules/messages

by wendy

Hi, I'm working on a system that has a large number of rules and we are getting to the point where we think it would be useful to have some 'debug' or 'warning' type rules (for lack of a better word). The warning rules would be rules that would signal to us that something is wrong with the underlying data and would require someone to go in and fix something. I was wondering if there are some standard practice as to how to write, maintain, format... these rules. I can think of a couple of ways to do this but I would like the communities opinion. We would also like the ability to turn on/off these debug or warning rules easily while the rest of the system keeps on processing. Thank you, Wendy -- View this message in context: http://drools.46999.n3.nabble.com/Common-Practices-for-warning-or-debug-r... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 9 months

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Re: [rules-users] Drools 5.0 -> 5.2 Migration Issue

by Steven Waldren

Wolfgang, The ActorType definition is here: https://github.com/openhealthdata/CCR-Validator/blob/drools5.0/src/main/j... The point of this rule (and the other rules in this package) is to "walk" through a very complex object graph and insert the objects into working memory. I do not use the rule attribute "dialect". The drl in question is here: https://github.com/openhealthdata/CCR-Validator/blob/drools5.0/src/main/r... I tried to create a simple project that caused the same error, but I create a Class with inner classes similar to ActorType and write a rule like the one in question, but it does not cause the error. Thanks, Steven -- Steven E. Waldren, MD MS Co-founder, Open Health Data On Jun 29, 2011, at 2:49 AM, rules-users-request(a)lists.jboss.org wrote: > Date: Wed, 29 Jun 2011 09:49:10 +0200 > From: Wolfgang Laun <wolfgang.laun(a)gmail.com> > Subject: Re: [rules-users] Drools 5.0 -> 5.2 Migration Issue > To: Rules Users List <rules-users(a)lists.jboss.org> > Message-ID: <BANLkTin04ytQVP6T3tdR6j8ZjUKCO9Rvyw(a)mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Please provide the type declaration for ActorType.Person, field gender and > typicial examples how gender fields are used in other rules. Ideally, if you > could reduce your rule set to this simple rule and one other rule, still > causeing the same problem. > > Also, do you use "dialect 'mvel'"? > > -W

12 years, 10 months

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Date arithmetic in when part

by rouvas＠mm.di.uoa.gr

Hi list, I feel this should be an elementary question but unfortunately I haven't been able to find a solution. I would like to perform date arithmetic in the when part of a rule. For example, I would like to express something like: rule "Date compare rule" dialect "mvel" when a : A() b : B( a.creationDate <= b.creationDate after 3 months) then ... end Apart from using eval()'s is there any other way to express these types of comparisons? Thank you for your time, -Stathis

12 years, 10 months

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Range operator in Excel Decision Table

by GrooV

Hi, Im currently trying to get a small decision table working with a range operator using a simple Person object to check if its age fits within the range. It doesn’t matter what I use and I tried almost all possibility’s I find online: • Age > $1, age < $2 • Age > $1 && < $2 • Age > $1 && age < $2 • Age > $1, < $2 None of em seem to work. But when I try age > $1 of age > $1 || < $2 it works. I can’t see what im doing wrong since most tutorials I follow use this operator to check if an age fits in the range. I attached the Excel sheet to this post. Thanks in advance, Matthijs http://drools.46999.n3.nabble.com/file/n3120750/CheckAccepted.xls CheckAccepted.xls -- View this message in context: http://drools.46999.n3.nabble.com/Range-operator-in-Excel-Decision-Table-... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 10 months

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activation dependent of rule order in drl file in 5.2.0.Final?

by Florian Beckmann

Hi, because of https://issues.jboss.org/browse/JBRULES-2942 i just migrated our (maven) project to 5.2.0.Final - we depend on salience in some of our rules. However, after the salience issue was gone I'm facing a new problem in several test cases: Rules in previously (drools 5.1.1) working rule files don't get activated anymore when I insert facts - none at all. When moving the rule expected to fire (see "rule 4" in attached file) to the first position in the drl file then suddenly several rules get activated and the expected rule fires. This shouldn't be the case, shouldn't it? Or do I miss something obvious here? Could a corrupt file somehow cause this? I attachached the rule file which causes the problem (I needed to obfuscate some names, sry). It is quite simple. I experienced a similar issue (again since 5.2.0.Final) with rules generated from templates, where I had to change the constraints order in the templates' LHS for then generated rules to get activated at all. First I would like to know if my statement that the rule position in the drl file shouldn't influence the activation (I don't mean firing or order of activations) of a rule at all, is correct. I don't use agenda groups. And second if someone experienced similar issues. I will try to build a test case which hopefully can reproduce this as soon as possible. Florian

12 years, 10 months

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NullPointerException in RightTupleIndexHashTable.remove()

by Weiss, Wolfgang

Hi all! I encountered that null pointer exceptions occur when retracting an object from the working memory. Sometimes the problem occurs sooner sometimes later but it certainly happens. I think it also depends on the workload on the machine. Sometimes the NPE is thrown in 'LeftTupleIndexHashTable' but mainly in 'RightTupleIndexHashTable'. After the exception is thrown, the object to retract is still in the working memory. When I remove the line 'retract($obj)' in my rule, I don't get an exception. The problem occurs mainly in this rule, but also in other rules: rule "remove a cross talk" agenda-group "evaluation" activation-group "ag-crossTalk" lock-on-active true salience 40 when $ctf : CrossTalkFact($persID : uniquePersonID, $ctfTimestamp : timestamp) $pers : AnalysisCue(cueType == AnalysisCue.ACTION_STOP_TALKING, uniquePersonID == $persID, timestamp > $ctfTimestamp) from entry-point "LowLevelCueStream" then retract($ctf); //the suspicious line //... do some other things end My configuration: drools.dialect.java.compiler = JANINO EventProcessingOption = STREAM I was able to reproduce the problem with following versions: 5.1.1 5.2.0.M1 5.2.0.CR1 Stack trace from the version: 5.2.0.CR1 org.drools.runtime.rule.ConsequenceException: rule: remove a cross talk at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:915) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:844) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1055) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:699) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) ... Caused by: java.lang.NullPointerException at org.drools.core.util.RightTupleIndexHashTable.remove(RightTupleIndexHashTable.java:351) at org.drools.reteoo.NotNode.retractRightTuple(NotNode.java:178) at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:235) at org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:229) at org.drools.common.NamedEntryPoint.retract(NamedEntryPoint.java:529) at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:226) at eu.ta2.orchestration.engine.cueLifter.Rule_remove_a_cross_talk_0.defaultConsequence(Unknown Source) at eu.ta2.orchestration.engine.cueLifter.Rule_remove_a_cross_talk_0DefaultConsequenceInvoker.evaluate(Unknown Source) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:905) ... 31 more Sometimes the exception occurs in the LeftTupleIndexHashTable: org.drools.runtime.rule.ConsequenceException: rule: remove a cross talk at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:915) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:844) at org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1055) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:733) at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:699) at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:218) ... Caused by: java.lang.NullPointerException at org.drools.core.util.LeftTupleIndexHashTable.remove(LeftTupleIndexHashTable.java:275) at org.drools.reteoo.NotNode.retractLeftTuple(NotNode.java:231) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:212) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:86) at org.drools.reteoo.JoinNode.retractLeftTuple(JoinNode.java:210) at org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateRetractLeftTuple(SingleLeftTupleSinkAdapter.java:212) at org.drools.reteoo.SingleLeftTupleSinkAdapter.propagateRetractRightTuple(SingleLeftTupleSinkAdapter.java:119) at org.drools.reteoo.JoinNode.retractRightTuple(JoinNode.java:192) at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:235) at org.drools.reteoo.EntryPointNode.retractObject(EntryPointNode.java:229) at org.drools.common.NamedEntryPoint.retract(NamedEntryPoint.java:529) at org.drools.base.DefaultKnowledgeHelper.retract(DefaultKnowledgeHelper.java:226) at eu.ta2.orchestration.engine.cueLifter.Rule_remove_a_cross_talk_0.defaultConsequence(Unknown Source) at eu.ta2.orchestration.engine.cueLifter.Rule_remove_a_cross_talk_0DefaultConsequenceInvoker.evaluate(Unknown Source) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:905) ... 31 more Any help is appreciated. Best regards, Wolfgang

12 years, 10 months

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Guvnor guided editor problem - "add more options"

by capeja

Hi all, I'm completely new to Drools and Guvnor and I'm following the "JBoss Drools Business Rules" book's instructions for getting familiar with Drools. When adding action to rule I cannot get the "add more options" feature working in Guided Editor - "U->" like icon is missing and the "pen" icon does not work either. For those who have the book, I'm talking about the example in page 102. The data model is exactly as described in the sample case. Any idea of what's the problem? BR, Pekka -- View this message in context: http://drools.46999.n3.nabble.com/Guvnor-guided-editor-problem-add-more-o... Sent from the Drools: User forum mailing list archive at Nabble.com.

12 years, 10 months

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rules-users June 2011