January 2013 - rules-users - Jboss List Archives

by Binyala, Krishna Gopal IN BLR SISL

Hello, I am new to drools community... I want to develop an expert system for medical application using drools. can you please let me know how to use history data in drools... Because as far as i know we have to keep all the data in the working memory to access. How should i implement such system? Would be better if you can provide some reference to existing expert system implemented using drools. Thanks in advance. Krishna Gopal In three words I can sum up everything I've learned about life: it goes on... Important notice:This e-mail and any attachment thereto contains corporate proprietary information. If you have received it by mistake, please notify us immediately by reply e-mail and delete this e-mail and its attachments from your system. Thank You.

13 years, 5 months

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Capturing condition/constraint evaluation results

by katvik

Hi, We are using decision table in our application and I need to capture the results of the evaluation of every condition of a rule. Is it possible? Thank you. -- View this message in context: http://drools.46999.n3.nabble.com/Capturing-condition-constraint-evaluati... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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DSL Translation

by prashantmirajkar＠gmail.com

In my project coding standard is as follows class members names as nameWithEachWordWithFirstLetterUpperCase and related getters and setters have getNameWithEachWordWithFirstLetterUpperCase and setNameWithEachWordWithFirstLetterUpperCase respectively. While using the DSL unlike ucfirst which converts first letter to upper case and rest to lower case, I want to have only first letter converted to upper case leaving other letters as they are. How can it be achieved? I am using drools 5.3.3 thanks in advance, Prashant -- View this message in context: http://drools.46999.n3.nabble.com/DSL-Translation-tp4021842.html Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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Dedication to Wolfgang Laun - Thank You

by Reinis

I want to thank you all. You, the members of drools community, for making this platform alive by giving away your knowledge and contributing the development of drools by sharing your thought and inducing the discussion. You, the developers of drools, for having ability to make it work and for actually making it work! And this time I want to say a special thanks to you, Wolfgang Laun, for being selfless, humble and having the gift of explaining things not because you're a doctor (of math btw) but because you have it down pat. And I thank you for sacrificing a lot of your private time to help me to solve my drools problem. So cheers to you, Wolfgang - a scientist, a mentor, a friend. Reinis

13 years, 5 months

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Duration rule attribute

by starfish15

Hello, A project is trying to weigh between BLAZE & DROOLS. N am a Drools FAN personally, since w/o doubt OPEN SOURCE always ROCKS. ;-) It was mentioned that in BLAZE there is a manner in which they decide on the rules validity period. Though even i mentioned that the same definitely exists in Drools as well. Since i had read a bit about. However, i did get confused with a part of the thing. 1. It was asked that in Drools will the rules be able to be valid for up til a year. Cause it seems in Blaze it is possible to change the validity till a year as well. 2. If yes, then i would appreciate if an example is given for the same Kindly help with this. Regards, starfish -- View this message in context: http://drools.46999.n3.nabble.com/Duration-rule-attribute-tp4021843.html Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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Error selecting order decrease

by André Fróes

Hello there, i'm getting this error: ------------------- 11:26:50.394 [main] INFO o.d.p.core.solver.DefaultSolver - Solving started: time spend (187), score (null), new best score (null), random seed (0). Exception in thread "main" java.lang.IllegalStateException: The selectionOrder (DECREASING_DIFFICULTY) can not be used on a PlanningEntity (com.swa.planner.domain.CloudProcess) that has no support for difficulty sorting. Check the @PlanningEntity annotation. at org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.validate(PlanningEntitySelector.java:53) at org.drools.planner.core.heuristic.selector.entity.PlanningEntitySelector.phaseStarted(PlanningEntitySelector.java:45) at org.drools.planner.core.constructionheuristic.greedyFit.selector.GreedyPlanningEntitySelector.phaseStarted(GreedyPlanningEntitySelector.java:41) at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.phaseStarted(DefaultGreedyFitSolverPhase.java:111) at org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:57) at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190) at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155) at com.swa.planner.domain.CloudTest.main(CloudTest.java:51) ------------------------- I know why it is happening though (at least i think so), but will I have to implement the comparator to every planner I do or is there any other way to make it work? I'm reproducing the example from the guide, when it passes the drools rules it gives that message. I didn't implement CloudComputerStrengthComparator neither CloudProcessDifficultyComparator, will I have to implement those so this example works?

13 years, 5 months

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applyChangeSet slow

by rjr201

Hi, I've created a rule package in Guvnor which I have been accessing using a changeset.xml file. When calling applyChangeSet() on the KnowledgeAgent, it is taking roughly 5 seconds to complete. Is this normal? I don't have a large amount of rules. I have tried downloading the package file and having the changeset.xml read it locally, but it is still taking a long time to apply. Does anyone know of a way to speed this up? I'm very grateful for any help/advice anyone can give me on this. Cheers, Rich. -- View this message in context: http://drools.46999.n3.nabble.com/applyChangeSet-slow-tp4021861.html Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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Stateful Session giving major issues

by starfish15

Hello, I am using Drools 5.2. I am not sure why not able to find the result here. I am supposed to get the value from the Action in this rule as shown below. But its never found. Kindly assist me with what is it that i have'nt included. First the rules //generated from Decision Table import boa.poc.java.SSI; import boa.poc.java.CMPG_REF; import boa.poc.java.Result_Rules; // rule values at C12, header at C7 rule "Access sql table_12" when ssi : SSI(CD == "ES", EOC_IN == "Y", IN == "N") cmpgRef : CMPG_REF(CMPG == 123, 01_NO == "12") result : Result_Rules(dummyCond == "result") then result.setDummyAction("Access I"); end Second the code @SuppressWarnings("rawtypes") public HashMap<String, List> retrievRuleResult(HashMap hm) { try { // load up the knowledge base KnowledgeBase kbase = readKnowledgeBase(); SSI ssi = (SSI)hm.get("pa_cycle_ssi"); CMPG_REF cmpRef = (CMPG_REF)hm.get("pa_cmpg_ref"); Result_Rules rulesResult = (Result_Rules)hm.get("dummyCond"); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); ksession.insert(ssi); ksession.insert(cmpRef); ksession.insert(rulesResult); ksession.fireAllRules(); ksession.dispose(); System.out.println("Result 1 : "+rulesResult.getDummyAction()); return ; } public KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("poc/rules/rules.pkg"), ResourceType.PKG); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error: errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = kbuilder.newKnowledgeBase(); return kbase; } -- View this message in context: http://drools.46999.n3.nabble.com/Stateful-Session-giving-major-issues-tp... Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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Drools with DB based rule

by starfish15

Hello, I need to write a rule in a spreadsheet DT according to the below condition *Fact1.key1 == Fact3.key2* where the Facts have been designed on the basis of DB Tables and respective columns. It is mentioned that these tables would be joined on the basis of these columns i.e. key1and key2. and further the Action should be the value of these keys. If the condition satisfies, the action wud be *key1.getId();* Let me mention that my DB funda are a little STALE, hence probably am not able to write this rule. It doesn't seem to be complex, but m absolutely not sure how should i b writing the same. Kindly assist ASAP. Regards, starfish -- View this message in context: http://drools.46999.n3.nabble.com/Drools-with-DB-based-rule-tp4021857.html Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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Drools locking threads

by nalvesp

I need some support with Drools. I'm using Drools 5.2 in a multi-threaded environment. Basicaly, every login into a website is calling an execute method in a StatelessKnowledgeSession. After some time, threads start to lock as below: "[ACTIVE] ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'" id=18 idx=0xc0 tid=7267 prio=5 alive, in native, blocked, daemon -- Blocked trying to get lock: org/drools/event/RuleBaseEventSupport@0x2aab52d6f518[fat lock] at jrockit/vm/Threads.waitForUnblockSignal()V(Native Method) at jrockit/vm/Locks.fatLockBlockOrSpin(Locks.java:1679)[optimized] at jrockit/vm/Locks.lockFat(Locks.java:1780)[optimized] at jrockit/vm/Locks.monitorEnterSecondStageHard(Locks.java:1312)[optimized] at jrockit/vm/Locks.monitorEnterSecondStage(Locks.java:1259)[optimized] at org/drools/event/AbstractEventSupport.addEventListener(AbstractEventSupport.java:65)[inlined] at org/drools/common/AbstractRuleBase.addEventListener(AbstractRuleBase.java:1018)[optimized] at org/drools/impl/KnowledgeBaseImpl.addEventListener(KnowledgeBaseImpl.java:127)[optimized] at org/jbpm/process/instance/ProcessRuntimeImpl.initProcessEventListeners(ProcessRuntimeImpl.java:201) at org/jbpm/process/instance/ProcessRuntimeImpl.<init>(ProcessRuntimeImpl.java:68)[optimized] at org/jbpm/process/instance/ProcessRuntimeFactoryServiceImpl.newProcessRuntime(ProcessRuntimeFactoryServiceImpl.java:10) at org/jbpm/process/instance/ProcessRuntimeFactoryServiceImpl.newProcessRuntime(ProcessRuntimeFactoryServiceImpl.java:6) at org/drools/runtime/process/ProcessRuntimeFactory.newProcessRuntime(ProcessRuntimeFactory.java:12) at org/drools/common/AbstractWorkingMemory.createProcessRuntime(AbstractWorkingMemory.java:359)[inlined] at org/drools/common/AbstractWorkingMemory.setKnowledgeRuntime(AbstractWorkingMemory.java:1260)[inlined] at org/drools/impl/StatefulKnowledgeSessionImpl.<init>(StatefulKnowledgeSessionImpl.java:116)[inlined] at org/drools/impl/StatelessKnowledgeSessionImpl.newWorkingMemory(StatelessKnowledgeSessionImpl.java:129)[inlined] at org/drools/impl/StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:293)[optimized] at br/com/cielo/engineRules/services/impl/CancelamentoRuleBean.validarRegrasCancelamento(CancelamentoRuleBean.java:79)[optimized] at br/com/cielo/engineRules/services/impl/CancelamentoRuleEJB_vyscvn_EOImpl.validarRegrasCancelamento(CancelamentoRuleEJB_vyscvn_EOImpl.java:205)[optimized] at br/com/cielo/engineRules/services/impl/CancelamentoRuleEJB_vyscvn_EOImpl_WLSkel.invoke(ILweblogic/rmi/spi/InboundRequest;Lweblogic/rmi/spi/OutboundResponse;Ljava/lang/Object;)Lweblogic/rmi/spi/OutboundResponse;(Unknown Source)[optimized] at weblogic/rmi/internal/BasicServerRef.invoke(BasicServerRef.java:589)[optimized] at weblogic/rmi/cluster/ClusterableServerRef.invoke(ClusterableServerRef.java:230)[optimized] at weblogic/rmi/internal/BasicServerRef$1.run(BasicServerRef.java:477)[inlined] at weblogic/security/acl/internal/AuthenticatedSubject.doAs(AuthenticatedSubject.java:363)[inlined] at weblogic/security/service/SecurityManager.runAs(Lweblogic/security/acl/internal/AuthenticatedSubject;Lweblogic/security/acl/internal/AuthenticatedSubject;Ljava/security/PrivilegedExceptionAction;)Ljava/lang/Object;(Unknown Source)[inlined] at weblogic/rmi/internal/BasicServerRef.handleRequest(BasicServerRef.java:473)[inlined] at weblogic/rmi/internal/wls/WLSExecuteRequest.run(WLSExecuteRequest.java:118)[optimized] at weblogic/work/ExecuteThread.execute(ExecuteThread.java:201)[optimized] at weblogic/work/ExecuteThread.run(ExecuteThread.java:173) at jrockit/vm/RNI.c2java(JJJJJ)V(Native Method) -- end of trace I went to Drool's source code and there's a synchronized section right before the lock. I'm afraid Drools doesn't support multi-thread processing. Does anyone know anything about this issue??? Tks -- View this message in context: http://drools.46999.n3.nabble.com/Drools-locking-threads-tp4021732.html Sent from the Drools: User forum mailing list archive at Nabble.com.

13 years, 5 months

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rules-users January 2013