[rules-users] ClassLoader parameter and Init function of RuleBaseConfiguration

[ssprick]

Hello everyone,

I'm struggling with the following error after updating from Drools 5.1M1 to
5.3Final when handing over a URLClassloader as a parameter for
RuleBaseConfiguration. The URL of the classLoader points to Jar file
containing the facts.

ERROR JobRunShell - Job TIQRULES_PROJECT4.TIQRULES_PROJECT4 threw an
unhandled Exception: 
java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V
                at
de.tiq.rules.drools.DroolsEngine.createKnowledgeBase(DroolsEngine.java:263)
                at
de.tiq.rules.drools.DroolsEngine.run(DroolsEngine.java:95)
                at
de.tiq.rules.TIQRulesEngine.executeRuleResource(TIQRulesEngine.java:178)
                at
de.tiq.quartz.QuartzTaskExecutor.execute(QuartzTaskExecutor.java:173)
                at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
                at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
ERROR ErrorLogger - Job (TIQRULES_PROJECT4.TIQRULES_PROJECT4 threw an
exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested
exception: java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V]
                at org.quartz.core.JobRunShell.run(JobRunShell.java:210)
                at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
Caused by: java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V
                at
de.tiq.rules.drools.DroolsEngine.createKnowledgeBase(DroolsEngine.java:263)
                at
de.tiq.rules.drools.DroolsEngine.run(DroolsEngine.java:95)
                at
de.tiq.rules.TIQRulesEngine.executeRuleResource(TIQRulesEngine.java:178)
                at
de.tiq.quartz.QuartzTaskExecutor.execute(QuartzTaskExecutor.java:173)
                at org.quartz.core.JobRunShell.run(JobRunShell.java:199)

This is the part of the code where the ClassLoader is given as a parameter:
/**
                * create a knowledge base of a given rule resource
                * 
                 * @param ruleResource
                *            the rule resource
                * @return the created knowledge base
                */
                private KnowledgeBase createKnowledgeBase(IRuleResource
ruleResource) {
                               if (ruleResource == null) {
                                               throw new
NullPointerException("ruleResource is null");
                               }
                               KnowledgeBase kbase;
                               ClassLoader[] arrayOfClassLoaders = new
ClassLoader[1];
                               arrayOfClassLoaders[0] =
currProject.getFactsClassLoader();
                               final KnowledgeBaseConfiguration kbaseconfig
= new RuleBaseConfiguration(currProject.getFactsClassLoader());
                               kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseconfig);
                              
kbase.addKnowledgePackages(ruleResource.getKnowledgePackages(kbase));
                               return kbase;
                }

This is what getFactsClassLoader does:
public ClassLoader getFactsClassLoader() {
	try {
	    if (factsClassLoader == null) {
		URL jarURL;

		jarURL = getExecuteJarFile().toURI().toURL();

		factsClassLoader = new URLClassLoader(new URL[] { jarURL },
Thread.currentThread()
			.getContextClassLoader());
	    }
	    return factsClassLoader;
	} catch (final MalformedURLException e) {
	    throw new RuntimeException(e);
	}
    }

Thx in advance for any hint on solving the mentioned problem!





--
View this message in context: http://drools.46999.n3.nabble.com/ClassLoader-parameter-and-Init-function-of-RuleBaseConfiguration-tp3489741p3489741.html
Sent from the Drools: User forum mailing list archive at Nabble.com.