[rules-users] No ClassLoaders found for: String
Edson Tirelli
tirelli at post.com
Tue Jan 13 11:51:52 EST 2009
Thanks, next release will use mvel 2.0.6.
[]s
Edson
2009/1/13 Paul Sentosa <psentosa at yahoo.com>
> Yes, it works with 2.0.6. Otherwise I should define the String separately
> (String abc = "a string"; list.add(abc); in order for the consequence to be
> executed correctly)
>
> Thanks Edson!
> Regards
> Paul
>
> ------------------------------
> *From:* Edson Tirelli <tirelli at post.com>
> *To:* Rules Users List <rules-users at lists.jboss.org>
> *Sent:* Tuesday, January 13, 2009 5:03:32 PM
> *Subject:* Re: [rules-users] No ClassLoaders found for: String
>
>
> Yes, I see. Can you please manually update your local mvel jar to
> version 2.0.6 (latest) and try again? I am talking to the MVEL author to
> make sure the problem is fixed in the latest version, but of course, if you
> can confirm this on your side, it would be best.
>
> []s
> Edson
>
> 2009/1/13 psentosa <psentosa at yahoo.com>
>
>>
>> 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 <http://org.jboss.mx.loading.LoadMgr3.be>
>> .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.
>> >>
>> >> _______________________________________________
>> >> rules-users mailing list
>> >> rules-users at lists.jboss.org
>> >> https://lists.jboss.org/mailman/listinfo/rules-users
>> >>
>> >
>> >
>> >
>> > --
>> > 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
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/No-ClassLoaders-found-for%3A-String-tp21437370p21438374.html
>> Sent from the drools - user mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> rules-users mailing list
>> rules-users at lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
>
> --
> 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
>
>
--
Edson Tirelli
JBoss Drools Core Development
JBoss, a division of Red Hat @ www.jboss.com
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