January 2011 - rules-users - Jboss List Archives

by Gorantla, Bhaskar (GE Capital)

We are looking for a rules engine that has the following characteristics. 1. Supports both Java and .net 2. Provides a business user friendly UI for creating/editing rules 3. Supports versioning 4. The rues in the rules repository are accessible to both Java and .net applications - Nice to have Do you know whether Drools supports all the above? Thanks

13 years, 9 months

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How do I prevent the package registry from being null in my package builder?

by retoy

I just installed Drools and wanted to build a simple RuleFlow. But When I add any process containing constraints or rules to my Knowledgebuilder, I'm always getting a NullPointerException, because the "package registry" seems to be null. ..... java.lang.NullPointerException at org.drools.compiler.ProcessBuilder.buildProcess(ProcessBuilder.java:119) at org.drools.compiler.ProcessBuilder.addProcessFromFile(ProcessBuilder.java:223) at org.drools.compiler.PackageBuilder.addProcessFromXml(PackageBuilder.java:447) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:503) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25) ..... ProcessBuilder.java:118 PackageRegistry pkgRegistry = this.packageBuilder.getPackageRegistry(process.getPackageName()); ProcessBuilder.java:119 org.drools.rule.Package p = pkgRegistry.getPackage(); ..... The ruleflow is successfully validated though when i press that button in eclipse... Can somebody give me a hint what's missing? Thanks! -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/How-do-I-prevent-the-... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 9 months

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Guvnor - Limitation for number of classes or fields?

by Dean Whisnant

My class model contains in the neighborhood of 2,400 fields which we have broken down into the imported classes below. The breakdown is based upon repeatable loops within an EDI transaction. This allows our users to first select the LOOP (or class from below) and then choose from a smaller number of fields when building their rules. When creating a rule in Guvnor, the WHEN class/field choosers work very quickly. But then when you do the THEN side, a message pops up saying that A Script on the page is causing the web browser to run slowly. You have to answer NO to this question approximately 3 times before it then brings up the "add new action" dialog. The field chooser then works fine, though you get the script message again when you go to add another action. Is there a limitation to Guvnor for the number of classes or fields in the model? Is there a memory setting that needs to be configured differently? Thank you in advance! Dean import com.hipaa837p.Loop2420B_Segment_REF import com.hipaa837p.Loop2420D_Segment_REF import com.hipaa837p.Loop2330B_Segment_DTP import com.hipaa837p.Loop2010CA_Segment_NM1 import com.hipaa837p.Loop2010BA_Segment_NM1 import com.hipaa837p.Loop2400_Segment_K3 import com.hipaa837p.Loop2300_Segment_SV5 import com.hipaa837p.Loop2330C_Segment_REF import com.hipaa837p.Loop2400_Segment_HCP import com.hipaa837p.Loop2300_Segment_SV1 import com.hipaa837p.Loop2400_Segment_SV1 import com.hipaa837p.Loop2400_Segment_DTP import com.hipaa837p.Loop2000B_Segment_SBR import com.hipaa837p.Loop2300_Segment_QTY import com.hipaa837p.Loop2420H_Segment_N4 import com.hipaa837p.Loop2310E_Segment_NM1 import com.hipaa837p.Loop2010CA_Segment_REF import com.hipaa837p.Loop2400_Segment_CR3 import com.hipaa837p.TransactionTrailer_Segment_SE import com.hipaa837p.Loop2310A_Segment_NM1 import com.hipaa837p.Loop2420H_Segment_N3 import com.hipaa837p.Loop2400_Segment_CR1 import com.hipaa837p.Loop2400_Segment_PWK import com.hipaa837p.Loop2300_Segment_CRC import com.hipaa837p.Loop2420G_Segment_NM1 import com.hipaa837p.Loop2010BB_Segment_NM1 import com.hipaa837p.Loop2300_Segment_SBR import com.hipaa837p.Loop2410_Segment_CTP import com.hipaa837p.Loop2320_Segment_AMT import com.hipaa837p.Loop2010AA_Segment_REF import com.hipaa837p.Loop2420C_Segment_N3 import com.hipaa837p.Loop2310B_Segment_PRV import com.hipaa837p.Loop2420E_Segment_PER import com.hipaa837p.Loop2420C_Segment_N4 import com.hipaa837p.Loop2330F_Segment_REF import com.hipaa837p.Loop2310C_Segment_PER import com.hipaa837p.Loop2420F_Segment_NM1 import com.hipaa837p.Loop2330D_Segment_REF import com.hipaa837p.Loop2300_Segment_PAT import com.hipaa837p.Loop2300_Segment_AMT import com.hipaa837p.Loop2010AC_Segment_N3 import com.hipaa837p.Loop2300_Segment_CUR import com.hipaa837p.Loop2420G_Segment_N4 import com.hipaa837p.Loop2420G_Segment_N3 import com.hipaa837p.Loop2010AC_Segment_N4 import com.hipaa837p.Loop2320_Segment_MOA import com.hipaa837p.Loop2310E_Segment_N3 import com.hipaa837p.Loop2300_Segment_FRM import com.hipaa837p.Loop2300_Segment_CN1 import com.hipaa837p.Loop2310E_Segment_N4 import com.hipaa837p.Loop2330A_Segment_REF import com.hipaa837p.Loop2010AC_Segment_NM1 import com.hipaa837p.Loop2420H_Segment_NM1 import com.hipaa837p.Loop2310D_Segment_NM1 import com.hipaa837p.Loop2300_Segment_PRV import com.hipaa.CLM_PendInformation import com.hipaa837p.Loop2400_Segment_CRC import com.hipaa837p.Loop2010AA_Segment_PER import com.hipaa837p.Loop2000A_Segment_CUR import com.hipaa837p.Loop2310C_Segment_NM1 import com.hipaa837p.Loop2000A_Segment_PRV import com.hipaa837p.Loop1000B_Segment_NM1 import com.hipaa837p.Loop2000B_Segment_HL import com.hipaa837p.Loop2300_Segment_MEA import com.hipaa837p.Loop2410_Segment_LIN import com.hipaa837p.Loop2330F_Segment_NM1 import com.hipaa837p.Loop2300_Segment_DMG import com.hipaa837p.Loop2330E_Segment_REF import com.hipaa837p.Loop2300_Segment_CTP import com.hipaa837p.Loop2300_Segment_DTP import com.hipaa837p.Loop2010AA_Segment_N3 import com.hipaa837p.Loop2300_Segment_LIN import com.hipaa837p.Loop2010AA_Segment_N4 import com.hipaa837p.Loop2300_Segment_PS1 import com.hipaa837p.Loop2330C_Segment_NM1 import com.hipaa837p.Loop2300_Segment_CLM import com.hipaa837p.Loop2400_Segment_SV5 import com.hipaa837p.Loop2420D_Segment_NM1 import com.hipaa837p.Loop2400_Segment_REF import com.hipaa837p.Loop2330E_Segment_NM1 import com.hipaa837p.Loop2320_Segment_OI import com.hipaa837p.Loop2420C_Segment_NM1 import com.hipaa837p.Loop2010BA_Segment_REF import com.hipaa837p.Loop2400_Segment_QTY import com.hipaa837p.Loop2300_Segment_SE import com.hipaa837p.Loop2420A_Segment_REF import com.hipaa837p.Loop2010BA_Segment_DMG import com.hipaa837p.Loop2300_Segment_LX import com.hipaa837p.Loop2010AB_Segment_NM1 import com.hipaa837p.Loop2300_Segment_LQ import com.hipaa837p.Loop2430_Segment_SVD import com.hipaa837p.Loop2000C_Segment_HL import com.hipaa837p.Loop2000C_Segment_PAT import com.hipaa837p.Loop2330B_Segment_REF import com.hipaa837p.TransactionHeader_Segment_BHT import com.hipaa837p.Loop2400_Segment_PS1 import com.hipaa837p.Loop2410_Segment_REF import com.hipaa837p.TransactionHeader_Segment_ST import com.hipaa837p.Loop2310A_Segment_REF import com.hipaa837p.Loop2330G_Segment_REF import com.hipaa837p.Loop2310B_Segment_REF import com.hipaa.HipaaDroolsObject import com.hipaa837p.Loop2310D_Segment_REF import com.hipaa837p.Loop2420A_Segment_NM1 import com.hipaa837p.Loop2300_Segment_K3 import com.hipaa837p.Loop2300_Segment_N4 import com.hipaa837p.Loop2320_Segment_CAS import com.hipaa837p.Loop2300_Segment_N3 import com.hipaa837p.Loop2330D_Segment_NM1 import com.hipaa837p.Loop1000A_Segment_PER import com.hipaa837p.Loop2400_Segment_CN1 import com.hipaa837p.Loop2330A_Segment_N3 import com.hipaa837p.Loop1000A_Segment_NM1 import com.hipaa837p.Loop2330A_Segment_N4 import com.hipaa837p.Loop2330A_Segment_NM1 import com.hipaa837p.Loop2400_Segment_MEA import com.hipaa837p.Loop2010BB_Segment_REF import com.hipaa837p.Loop2310C_Segment_N3 import com.hipaa837p.Loop2310C_Segment_N4 import com.hipaa837p.Loop2000B_Segment_PAT import com.hipaa837p.Loop2330G_Segment_NM1 import com.hipaa837p.Loop2430_Segment_CAS import com.hipaa837p.Loop2010BA_Segment_PER import com.hipaa837p.Loop2300_Segment_NM1 import com.hipaa837p.Loop2300_Segment_NTE import com.hipaa837p.Loop2300_Segment_MOA import com.hipaa837p.Loop2310C_Segment_REF import com.hipaa837p.Loop2300_Segment_SVD import com.hipaa837p.Loop2400_Segment_LX import com.hipaa837p.Loop2420E_Segment_REF import com.hipaa837p.Loop2310B_Segment_NM1 import com.hipaa837p.Loop2000A_Segment_HL import com.hipaa837p.Loop2420C_Segment_REF import com.hipaa837p.Loop2300_Segment_PWK import com.hipaa.CLM_ClaimLineItem import com.hipaa837p.Loop2300_Segment_CR1 import com.hipaa837p.Loop2420E_Segment_N4 import com.hipaa837p.Loop2420E_Segment_N3 import com.hipaa837p.Loop2010AB_Segment_N3 import com.hipaa837p.Loop2300_Segment_CR3 import com.hipaa837p.Loop2400_Segment_AMT import com.hipaa837p.Loop2300_Segment_CR2 import com.hipaa837p.Loop2300_Segment_CAS import com.hipaa837p.Loop2310F_Segment_N4 import com.hipaa837p.Loop2300_Segment_PER import com.hipaa837p.Loop2010BA_Segment_N3 import com.hipaa837p.Loop2010BA_Segment_N4 import com.hipaa837p.Loop2310F_Segment_N3 import com.hipaa837p.Loop2010AB_Segment_N4 import com.hipaa837p.Loop2420B_Segment_NM1 import com.hipaa837p.Loop2330B_Segment_N3 import com.hipaa837p.Loop2330B_Segment_N4 import com.hipaa837p.Loop2010CA_Segment_N4 import com.hipaa837p.Loop2010CA_Segment_N3 import com.hipaa837p.Loop2320_Segment_SBR import com.hipaa837p.Loop2010CA_Segment_PER import com.hipaa837p.Loop2430_Segment_AMT import com.hipaa837p.Loop2010BB_Segment_N4 import com.hipaa837p.Loop2420E_Segment_NM1 import com.hipaa837p.Loop2300_Segment_REF import com.hipaa837p.Loop2420F_Segment_REF import com.hipaa837p.Loop2010AC_Segment_REF import com.hipaa837p.Loop2010BB_Segment_N3 import com.hipaa837p.Loop2330B_Segment_NM1 import com.hipaa837p.Loop2420A_Segment_PRV import com.hipaa837p.Loop2430_Segment_DTP import com.hipaa837p.Loop2010AA_Segment_NM1 import com.hipaa837p.Loop2010CA_Segment_DMG import com.hipaa837p.Loop2300_Segment_HL import com.hipaa837p.Loop2300_Segment_HI import com.hipaa837p.Loop2400_Segment_NTE import com.hipaa837p.Loop2300_Segment_OI import com.hipaa837p.Loop2310F_Segment_NM1 import com.hipaa837p.Loop2300_Segment_HCP

13 years, 9 months

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Question on Drools upgrade from 2 to 5

by Steve Floridas

Hi, We are an insurance company employing drools ( version 2 currently) for policy validation rules and for reading policy specific rates from spreadsheet using drools. We are currently running in to memory issues when we execute the compiled JAR ( including the drools compiled files), as there are lot of rules fired for different versions of policy rating. My question here is :- Is there any scope of resolving this memory issue with upgrade of drools package from version 2 to version 5? Will the compiled DRLs in Drools 5 be more compressed compared to Drools 2? I have been trying to upgrade to Drools 5 by adding the necessary jars for compilation. But unfortunately I am gettng few errors on spreadsheet and DRL compilation. Is there more to work on the upgrade? One of the errors I frequently get for spreadsheet comparison is something like below: *Invalid character input "?" (character code 65533)* Please clarify my above questions. Thank you much, Steve **

13 years, 9 months

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Drools Transaction Manager

by ramram

Hi All, Inside the persistence.xml file We are using Transaction manager: - TRANSACTION FOR JBOSS <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.JBossTransactionManagerLookup" /> - TRANSACTION FOR TOMCAT <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup"/> This means that for every server or container I have to disable one and enable the other. Is there a way to use the same transaction manager for both application servers? Regards, Ram -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Transaction-Ma... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 9 months

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How to obtain the object/fact created in the rule file?

by Benson Fung

Hi, I developed a rule as below: rule "Rule1" dialect "mvel" when Fields( field1 > "100" ) then FieldResults fact0 = new FieldResults(); fact0.setField1( "This is Correct!" ); insert(fact0 ); end After calling fireAllRules(...), the above rule will be fired and created a fact object in the working memory. My problem is how to obtain the FieldResults object in the java program. Please advise. Thanks Benson

13 years, 9 months

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Writing a pattern in which each event constraint depends on the previous event

by OlliSee

Hello everyone. Lets say we have StockTicks... Is it possible to detect a monotonically decreasing StockTick stream over a window? If I knew the number of events I want to check on, I'd do it this way $a : StockTick() over window:time(20s) $b : StockTick(this after $a, price < $a.price) over window:time(20s) ... But I don't know for how long the StockTick prices continue to decrease.. I imagine doing something like that $list : List(size > 0) from collect(StockTick() over window:time(20s)) forall($a : StockTick() from $list $b : StockTick(this after $a, price < $a.price from $list ) That results in a nice exception. Any idea how to do this work? And more efficiently than my approach? Thanks Oliver Exception in thread "Thread-1" java.lang.ClassCastException: org.drools.common.DefaultFactHandle cannot be cast to org.drools.common.EventFactHandle at org.drools.base.evaluators.AfterEvaluatorDefinition$AfterEvaluator.evaluateCachedLeft(AfterEvaluatorDefinition.java:336) at org.drools.rule.VariableRestriction.isAllowedCachedLeft(VariableRestriction.java:110) at org.drools.rule.VariableConstraint.isAllowedCachedLeft(VariableConstraint.java:115) at org.drools.common.DoubleBetaConstraints.isAllowedCachedLeft(DoubleBetaConstraints.java:166) at org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:274) at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:138) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:220) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:81) at org.drools.reteoo.FromNode.checkConstraintsAndPropagate(FromNode.java:279) at org.drools.reteoo.FromNode.assertLeftTuple(FromNode.java:138) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.doPropagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:220) at org.drools.reteoo.CompositeLeftTupleSinkAdapter.propagateAssertLeftTuple(CompositeLeftTupleSinkAdapter.java:81) at org.drools.reteoo.AccumulateNode.evaluateResultConstraints(AccumulateNode.java:662) at org.drools.reteoo.AccumulateNode.assertObject(AccumulateNode.java:270) at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:450) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:378) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:190) at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:145) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1187) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:1089) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:893) at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:238) -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Writing-a-pattern-in-... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 10 months

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Using escalation for human task

by odelyaholiday

Hi! How can I use escalation for human task? I mean that if the task was not completed in a time - it will be escalated to another user? I didn't find property deadline or escalation in human task! -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Using-escalation-for-... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 10 months

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Sliding window of length (1) equals latest event?!

by OlliSee

Hey again everyone, I seem to be having another problem. When I have a rule like that when A() over window:length(1) B() over window:length(1) then ... I imagine now having two windows of length 1. One always keeping the latest A event and one always keeping the latest B event. And I expect them to update themselves once a new event comes in. But if I have events coming in like this... A1, A2, B1 The rule fires for (A2, B1) then another event B2 is coming in and it fires for (A2,B2) So far so good. Then another event A3 is coming in and the rule fires for (A3,B2) and (A3,B1). Why? Shouldn't the B window only have B2 inside since it arrived and thus fire only for (A3,B2)? I have already been searching for this problem, found this http://drools-java-rules-engine.46999.n3.nabble.com/DROOLS-problem-with-s... but I'm not sure if this is the same problem as mine. Helping me understand this is highly appreciated, since I thought I had completely understood the window behaviour. Thanks in advance. Kind regards Oliver -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Sliding-window-of-len... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 10 months

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Why StatelessKnowledgeSession Instantiates a New StatefulKnowledgeSession on Each execute()?

by hyjshanghai

According to Section 3.3.7 "StatelessKnowledgeSession" of http://downloads.jboss.com/drools/docs/5.1.1.34858.FINAL/drools-expert/ht... the Drools document , "the act of calling execute() is a single-shot method that will internally instantiate a StatefulKnowledgeSession". Why StatelessKnowledgeSession instantiates a new statefulKnowledgeSession object on Each execute()? Instead, can it be implemented as inserting the fact into an existing empty statefulKnowledgeSession, and retract the fact after statefulKnowledgeSession.fireAllRules()? I think the current implementation will cause StatelessKnowledgeSession to be slower than statefulKnowledgeSession, as opposed to "common sense" that the former is less complex and should be faster. Any performance benchmark on Stateless v.s. Stateful Sessions? -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Why-StatelessKnowledg... Sent from the Drools - User mailing list archive at Nabble.com.

13 years, 10 months

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rules-users January 2011