4:56 a.m.
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(a)lists.jboss.org
[mailto:rules-users-bounces@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(a)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(a)post.com>
To: Rules Users List <rules-users(a)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(a)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(a)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.handleExcept
ion(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.j
ava:612)
> at
>
>
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.j
ava:589)
> at
>
>
org.drools.impl.StatelessKnowledgeSessionImpl.executeObject(StatelessKnowled
geSessionImpl.java:158)
>> ..................
>>
>> Caused by: [Error: could not create constructor: No ClassLoaders found
>> for:
>> String ]
>> [Near : {... Unknown ....}]
>> ^
> at
>
>
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCre
ation(ReflectiveAccessorOptimizer.java:805)
> at
>
>
org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeObjectCreation(Dynamic
Optimizer.java:80)
> at
>
>
org.mvel2.ast.NewObjectNode.getReducedValueAccelerated(NewObjectNode.java:14
8)
> at
>
org.mvel2.compiler.ExecutableAccessor.getValue(ExecutableAccessor.java:37)
> at
>
>
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(Reflect
iveAccessorOptimizer.java:590)
> at
>
>
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(R
eflectiveAccessorOptimizer.java:285)
> at
>
>
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
ReflectiveAccessorOptimizer.java:134)
> at
>
>
org.mvel2.optimizers.dynamic.DynamicOptimizer.optimizeAccessor(DynamicOptimi
zer.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(RepositoryClassLoad
er.java:521)
> at
>
>
org.jboss.mx.loading.RepositoryClassLoader.loadClass(RepositoryClassLoader.j
ava: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.compileConstructo
r(ReflectiveAccessorOptimizer.java:832)
> at
>
>
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeObjectCre
ation(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:
>
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0.html
> Sent from the drools - user mailing list archive at Nabble.com.
>
> _______________________________________________
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> rules-users(a)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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4.html
Sent from the drools - user mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
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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(a)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