Re: [rules-users] classLoader issue...
Thanks for your answer !
My configuration seems correct to me, I have all new jars in the
classpath (the ones indicated in the file README-DEPENDENCIES.txt at the
SVN trunk). I checked them all looking after another
BaseObjectClassFieldReader class, but only drools-core contains it.
By the way, rules are well compiled and executed, this issue only
happens when I put constraints on fields. So I think if drools-core was
not in the classpath, nothing would work at all...
Le mercredi 01 juillet 2009 à 08:46 -0400, Edson Tirelli a écrit :
It seems to me that the problem is not with the classloader of your
classes, but the classpath of the drools jars. Are you sure you
updated and have all the required new jars in your classpath? Drools 5
has a few new jars, like drools-api, that need to be available. Also,
check if there are any older jar still in the classpath that might be
clashing with the new jars.
[]s
Edson
2009/7/1 Julien Nicoulaud <julien.nicoulaud(a)bull.net>
Hi, I'm migrating my system from Drools 4.0.7 to Drools 5.1.0.
Now when I try to compile rules that check fact fields, I get
the
following exception:
ERROR: EventDispatcher: Error during dispatch.
(java.lang.NoClassDefFoundError:
org/drools/base/extractors/BaseObjectClassFieldReader)
java.lang.NoClassDefFoundError:
org/drools/base/extractors/BaseObjectClassFieldReader
( http://paste2.org/p/296380 )
It seems the classloaders I pass to the configurations are not
taken in
account... I get exactly the same error if I do not specify
the
classloaders. Here is the code:
KnowledgeBuilderConfiguration kBuilderCfg =
KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null,classLoader);
KnowledgeBuilder knowledgeBuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder(kBuilderCfg);
KnowledgeBaseConfiguration kbaseConfig =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null,multiBundleClassLoader);
kbaseConfig.setOption(EventProcessingOption.STREAM);
knowledgeBase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseConfig);
On Drools 4, we did exactly the same with PackageBuilder
instead of
KnowledgeBuilder and RuleBase for KnowledgeBase. So the
classloaders I
pass are the good ones... Is there some trick ?
Thanks for any help !
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--
Edson Tirelli
JBoss Drools Core Development
JBoss by Red Hat @ www.jboss.com
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