Re: [Jargos-developers] Problem med komponent i Argos (Problem with Drools component)

[Dan P. E. <dan...@ho...>]

Hi,
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I built your code, deployed it to Argos and invoked the test method in the =
Drools component using Argus. The cause of the error message is:
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Caused by: java.lang.NoClassDefFoundError: org/drools/base/ShadowProxy at j=
ava.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.d=
efineClass(Unknown Source) at org.drools.rule.MapBackedClassLoader.fastFind=
Class(MapBackedClassLoader.java:60) at org.drools.rule.MapBackedClassLoader=
.loadClass(MapBackedClassLoader.java:79) at java.lang.ClassLoader.loadClass=
(Unknown Source) at org.drools.reteoo.Rete$ClassObjectTypeConf.loadOrGenera=
teProxy(Rete.java:551) at org.drools.reteoo.Rete$ClassObjectTypeConf.define=
ShadowProxyData(Rete.java:498) at org.drools.reteoo.Rete$ClassObjectTypeCon=
f.<init>(Rete.java:465) at org.drools.reteoo.Rete.assertObject(Rete.java:15=
4) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192=
) at org.drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.jav=
a:71) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemo=
ry.java:886) at org.drools.common.AbstractWorkingMemory.insert(AbstractWork=
ingMemory.java:858) at org.drools.common.AbstractWorkingMemory.insert(Abstr=
actWorkingMemory.java:659) at argos.bangbang.drools.Drools.insertFact(Unkno=
wn Source) at argos.bangbang.drools.Drools.test(Unknown Source) ... 26 more
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It is a classloading problem, or rather a bug in Argos. Argos does not set =
a classloader before invoking methods from JMX. I've entered the bug into o=
ur bug tracking system.
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A workaround to this problem is to insert the following line:
Thread.currentThread().setContextClassLoader(Drools.class.getClassLoader())=
;
In the method that you are calling from JMX. This will ensure that the corr=
ect classloader is used.
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I will of course fix this bug in the next release of Argos.
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Dan


Date: Tue, 18 Dec 2007 22:37:28 +0100From: taj...@gm...: jargos-d=
eve...@li...: [Jargos-developers] Problem med kom=
ponent i ArgosHeisann!Jeg har satt opp en komponent med testmetoder.. Hvis =
jeg kj=F8rer den for seg selv fra main metoden funket den fint. Men n=E5r j=
eg putter den i Argos og kallet test() med Argus, s=E5 f=E5r jeg f=F8lgende=
 feilmelding: addRuleBase: Unable to load dialect 'org.drools.rule.builder.=
dialect.mvel.MVELDialectConfiguration:mvel'[16:07:46] [DynamicProxy] Warnin=
g: Unable to invoke test for argos.bangbang.drools.Drools: InvocationTarget=
Exception null=D8nsket output er:Hello WorldGoodbye cruel worldJeg har zipp=
et prosjektet rett fra Eclipse's workspace.Filen finnes p=E5: http://www.nr=
rg.org/Drools.zip Hilsen Tom Arild=20
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