[rules-users] Error on access variable in workingmemorylogger

[Steven Williams]

This may be http://jira.jboss.org/jira/browse/JBRULES-1415

cheers
Steve

On Wed, Apr 9, 2008 at 5:37 PM, vdelbart <delbart.v at mipih.fr> wrote:

>
> Hello,
>
> I have an error on WorkingMemoryLogger with this rule :
>
> package example
> import mcmipih.rules.demo.model.*;
> global Param param;
>
> rule "Your Third Rule"
>        dialect "mvel"
>        when
>                Param( iep : IEP  ) from param
>        then
>                System.out.println("Iep de param " + iep);
> end
>
> The error :
>
> java.lang.NullPointerException
>        at
>
> org.drools.base.mcmipih.rules.demo.model.Param22676229$getIEP.getValue(Unknown
> Source)
>        at
> org.drools.base.ClassFieldExtractor.getValue(ClassFieldExtractor.java:127)
>        at org.drools.rule.Declaration.getValue(Declaration.java:198)
>        at
>
> org.drools.audit.WorkingMemoryLogger.extractDeclarations(WorkingMemoryLogger.java:265)
>        at
>
> org.drools.audit.WorkingMemoryLogger.activationCreated(WorkingMemoryLogger.java:199)
>        at
>
> org.drools.event.AgendaEventSupport.fireActivationCreated(AgendaEventSupport.java:75)
>        at
> org.drools.reteoo.RuleTerminalNode.assertTuple(RuleTerminalNode.java:331)
>        at
> org.drools.reteoo.RuleTerminalNode.assertTuple(RuleTerminalNode.java:137)
>        at
>
> org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(SingleTupleSinkAdapter.java:20)
>        at org.drools.reteoo.FromNode.assertTuple(FromNode.java:90)
>        at
>
> org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(SingleTupleSinkAdapter.java:55)
>        at
>
> org.drools.reteoo.LeftInputAdapterNode.assertObject(LeftInputAdapterNode.java:116)
>        at
>
> org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:22)
>        at
> org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
>        at org.drools.reteoo.Rete.assertObject(Rete.java:175)
>        at
> org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
>        at
>
> org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(ReteooWorkingMemory.java:179)
>        at
>
> org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1315)
>        at
>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:462)
>        at
>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:433)
>        at
>
> execute.ExecReglesWorkingMemory.testExecReglesWorkingMemory(ExecReglesWorkingMemory.java:107)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:585)
>        at junit.framework.TestCase.runTest(TestCase.java:154)
>        at junit.framework.TestCase.runBare(TestCase.java:127)
>        at junit.framework.TestResult$1.protect(TestResult.java:106)
>        at junit.framework.TestResult.runProtected(TestResult.java:124)
>        at junit.framework.TestResult.run(TestResult.java:109)
>        at junit.framework.TestCase.run(TestCase.java:118)
>        at
>
> org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
>        at
>
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
>        at
>
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
>        at
>
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
>        at
>
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
>        at
>
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
>
>
> The workingmemorylogger wants to show the value of the variable iep even
> if
> my 'param' is not present in the working memory !
>
> Is it a bug ?
>
> thanks for your help,
>
> regards,
>
> V.
>
>
>
>
>
>
>
> --
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> Sent from the drools - user mailing list archive at Nabble.com.
>
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>



-- 
Steven Williams

Supervising Consultant

Object Consulting
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steven.williams at objectconsulting.com.au
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