[rules-users] No ClassLoaders found for: String

[psentosa]

I'm using maven to manage my libraries, thus I add these line in my pom.xml:
                <dependency>
			<groupId>org.drools</groupId>
			<artifactId>drools-api</artifactId>
			<version>5.0.0.M4</version>
		</dependency>
		<dependency>
			<groupId>org.drools</groupId>
			<artifactId>drools-core</artifactId>
			<version>5.0.0.M4</version>
		</dependency>

And I can see that mvel2-2.0.4 has been added, besides drools-api and core
5.0.0.M4
Thanks for the reply



Edson Tirelli-3 wrote:
> 
>     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
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://www.nabble.com/No-ClassLoaders-found-for%3A-String-tp21437370p21437370.html
>> Sent from the drools - user mailing list archive at Nabble.com.
>>
>> _______________________________________________
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>> rules-users at lists.jboss.org
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>>
> 
> 
> 
> -- 
>  Edson Tirelli
>  JBoss Drools Core Development
>  JBoss, a division of Red Hat @ www.jboss.com
> 
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
> 
> 

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