[rules-users] No ClassLoaders found for: String

[Edson Tirelli]

    What MVEL version are you using?

    []s
    Edson

2009/1/13 psentosa <psentosa at yahoo.com>

>
> Hallo,
>
> I have a rule like this, defined in Guvnor:
> when
>     Activity ( $date : date, workingTime > 240)
>
> then
>    System.out.println("Working time limit has been reached");
>    violatedRegulation.add(new String("regulation.general.working1"));
>
>
> violatedRegulation is a List<String> which I set as a global because later
> on I will extract the content of that list which is a key defined in a
> properties file
>
> ksession.setGlobal("violatedRegulation", violatedRegulation);
> ksession.executeObject(activity);
>
>
> but then I got the following exception:
> 15:52:59,687 INFO  [STDOUT] Working time limit has been reached
> 15:52:59,687 ERROR [MyExceptionInterceptor] [Error: could not create
> constructor: No ClassLoaders found for: String ]
> [Near : {... Unknown ....}]
>             ^
> org.drools.runtime.rule.ConsequenceException: [Error: could not create
> constructor: No ClassLoaders found for: String ]
> [Near : {... Unknown ....}]
>             ^
>        at
>
> org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23)
>        at
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:918)
>        at
> org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:871)
>        at
> org.drools.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1035)
>        at
>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:612)
>        at
>
> org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:589)
>        at
>
> org.drools.impl.StatelessKnowledgeSessionImpl.executeObject(StatelessKnowledgeSessionImpl.java:158)
> ..................
>
> Caused by: [Error: could not create constructor: No ClassLoaders found for:
> String ]
> [Near : {... Unknown ....}]
>             ^
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:805)
>        at
>
> org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeObjectCreation(DynamicOptimizer.java:80)
>        at
>
> org.mvel2.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:148)
>        at
> org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:37)
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(ReflectiveAccessorOptimizer.java:590)
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(ReflectiveAccessorOptimizer.java:285)
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(ReflectiveAccessorOptimizer.java:134)
>        at
>
> org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeAccessor(DynamicOptimizer.java:61)
>        at
> org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:127)
>        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:91)
>        at
> org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:101)
>        at org.mvel2.MVEL.executeExpression(MVEL.java:1025)
>        at
> org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:89)
>        at
> org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:909)
>        ... 97 more
> Caused by: java.lang.ClassNotFoundException: No ClassLoaders found for:
> String
>        at org.jboss.mx.loading.LoadMgr3.beginLoadTask(LoadMgr3.java:306)
>        at
>
> org.jboss.mx.loading.RepositoryClassLoader.loadClassImpl(RepositoryClassLoader.java:521)
>        at
>
> org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.java:415)
>        at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>        at java.lang.Class.forName0(Native Method)
>        at java.lang.Class.forName(Class.java:164)
>        at org.mvel2.util.ParseTools.createClass(ParseTools.java:458)
>        at org.mvel2.util.ParseTools.findClass(ParseTools.java:796)
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileConstructor(ReflectiveAccessorOptimizer.java:832)
>        at
>
> org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCreation(ReflectiveAccessorOptimizer.java:799)
>        ... 110 more
>
> Any help would be very appreciated
>
> ps: the very same rule worked with drools 4.0.7
>
> Regards
>
>
>
>
> --
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>
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>



-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com
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