[rules-users] Rule Compilation Problems

[Edson Tirelli]

   This is a JDT classpath problem. Either you have the wrong JDT version in
your classpath, or you have multiple clashing versions. Either fix it, or
switch to use JANINO as your compiler.

   Edson

2010/6/29 Jean-Philippe Steinmetz <jeanphilippe at trilogystudios.com>

> Hello everyone,
>
>
>
> I’m fairly new to Drools, having only worked with a basic setup for a
> little while now. I’ve successfully gotten a Drools 5.0.1 runtime working
> with an app running under JBoss 5 but now I need Drools to run under a
> standalone application. I’ve more or less copied all of the set up that I
> used in the JBoss app but am experiencing weird compilation problems.
>
>
>
> My application code looks like the following…
>
>
>
> KnowledgeAgent kagent = KnowledgeAgentFactory.*newKnowledgeAgent*(
> "MyAgenda");
>
> kagent.applyChangeSet(ResourceFactory.*newClassPathResource*(
> "my_rules.xml"));
>
> KnowledgeBase kbase = kagent.getKnowledgeBase();
>
> *final* StatefulKnowledgeSession ksession = kbase
> .newStatefulKnowledgeSession();
>
> ksession.addEventListener(*new* DebugAgendaEventListener());
>
> ksession.addEventListener(*new* DebugWorkingMemoryEventListener());
>
> KnowledgeRuntimeLogger krlogger = KnowledgeRuntimeLoggerFactory.*
> newConsoleLogger*(ksession);
>
>
>
> ksession.insert(myObject);
>
> ksession.fireAllRules();
>
>
>
> krlogger.close();
>
> ksession.dispose();
>
>
>
> and my rules file looks like…
>
>
>
> *package* mypackage
>
>
>
> *rule* "test"
>
>     *when*
>
>         Object()
>
>     *then*
>
>         System.out.println("Hello World!");
>
> *end*
>
>
>
> Finally this is the output I am seeing from my application…
>
>
>
> [2010:06:180 18:06:144:info] ResourceChangeNotification created
>
> [2010:06:180 18:06:147:info] ResourceChangeScanner created with default
> interval=60
>
> [2010:06:180 18:06:147:debug] ResourceChangeNotification monitor added
> monitor=org.drools.io.impl.ResourceChangeScannerImpl at 7d0b8078
>
> [2010:06:180 18:06:149:info] KnowledgAgent created, with configuration:
>
> monitorChangeSetEvents=true scanResources=true scanDirectories=true
>
> [2010:06:180 18:06:149:info] KnowledegAgent has started listening for
> ChangeSet notifications
>
> (null: 3, 78): SchemaLocation: schemaLocation value = '
> http://drools.org/drools-5.0/change-set.xsd' must have even number of
> URI's.
>
> (null: 3, 78): cvc-elt.1: Cannot find the declaration of element
> 'change-set'.
>
> [2010:06:180 18:06:181:info] KnowledgAgent applying ChangeSet
>
> [2010:06:180 18:06:182:debug] KnowledgeAgent subscribing to
> resource=[ClassPathResource path='TestRules.drl']
>
> [2010:06:180 18:06:182:debug] ResourceChangeNotification subscribing
> listener=org.drools.agent.impl.KnowledgeAgentImpl at 61176350 to
> resource=[ClassPath
>
> Resource path='TestRules.drl']
>
> [2010:06:180 18:06:185:debug] ResourceChangeScanner subcribing
> notifier=org.drools.io.impl.ResourceChangeNotifierImpl at 46794afc to
> resource=[ClassPathR
>
> esource path='TestRules.drl']
>
> [2010:06:180 18:06:187:debug] KnowledgeAgent ChangeSet requires
> KnowledgeBuilder
>
> [2010:06:180 18:06:187:debug] KnowledgeAgent rebuilding KnowledgeBase using
> ChangeSet
>
> [2010:06:180 18:06:315:debug] KnowledgeAgent building
> resource=[ClassPathResource path='TestRules.drl']
>
> java.lang.NoSuchMethodError:
> org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/eclipse/jdt/core/compiler/CategorizedProblem;
>
>         at
> org.drools.commons.jci.compilers.EclipseJavaCompiler$3.acceptResult(EclipseJavaCompiler.java:321)
>
>         at
> org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:335)
>
>         at
> org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:351)
>
>         at
> org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:51)
>
>         at
> org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:389)
>
>         at
> org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:56)
>
>         at
> org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:74)
>
>         at
> org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:690)
>
>         at
> org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:653)
>
>         at
> org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:290)
>
>         at
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:488)
>
>         at
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:25)
>
>         at
> org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:386)
>
>         at
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:120)
>
>         at
> org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109)
>
>
>
> Now I’ve checked all of the maven dependencies to make sure the they are
> all there and I can doubly confirm everything is fine. In fact, I even went
> so far to make sure the jars included in my app contained the
> org.eclipse.jdt.core.compiler.CategorizedProblem.class file. The only
> difference I’ve been able to think of so far is that my standalone
> application uses the Java service wrapper where JBoss does not.
>
>
>
> Any help is greatly appreciated.
>
>
>
> Cheers,
>
>
>
> Jean-Philippe Steinmetz
>
> _______________________________________________
> 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 by Red Hat @ www.jboss.com
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