[rules-users] No ClassLoaders found for: String
Edson Tirelli
tirelli at post.com
Thu Jan 15 10:04:12 EST 2009
Thanks, will fix that.
https://jira.jboss.org/jira/browse/JBRULES-1918
[]s
Edson
2009/1/15 Faron Dutton <fgdutton at gmail.com>
> I switched to v2.0.6 from v2.0.5 and found a breaking API change.
> org.mvel2.compiler.ExpressionCompiler no longer has a method called
> setDebugSymbols. ExpressionCompiler now queries ParserContext for this
> setting. This affects org.drools.base.mvel.MVELCompilationUnit (line 346)
> from drools-core and org.drools.rule.builder.dialect.mvel.MVELDialect (line
> 519) from drools-compiler.
>
>
>
> *From:* rules-users-bounces at lists.jboss.org [mailto:
> rules-users-bounces at lists.jboss.org] *On Behalf Of *Edson Tirelli
> *Sent:* Tuesday, January 13, 2009 11:52 AM
> *To:* Rules Users List
>
> *Subject:* Re: [rules-users] No ClassLoaders found for: String
>
>
>
>
> 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
>
> _______________________________________________
> 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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