jjmartinez
Reputation: 807
Drools Class not found for evaluator definition
I'm using Drools 5.5.0-Final and, suddenly, I have this exception
I put all the libraries again in my project, but the result is the same
org.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:136)
at org.drools.compiler.PackageBuilderConfiguration.buildEvaluatorRegistry(PackageBuilderConfiguration.java:550)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:170)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:300)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:228)
at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
at com.drools.optimizer.AppExpertSystem.readKnowledgeBase(AppExpertSystem.java:130)
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:115)
at com.drools.optimizer.AppExpertSystem.<init>(AppExpertSystem.java:46)
at eventlauncher.OptimizerLauncher.NuevoEscenario(OptimizerLauncher.java:57)
at eventlauncher.DemoPruebas.main(DemoPruebas.java:18)
Caused by: java.lang.ClassNotFoundException: Unable to load class: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:92)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:132)
... 12 more
Exception in thread "main" java.lang.RuntimeException: org.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:122)
at com.drools.optimizer.AppExpertSystem.<init>(AppExpertSystem.java:46)
at eventlauncher.OptimizerLauncher.NuevoEscenario(OptimizerLauncher.java:57)
at eventlauncher.DemoPruebas.main(DemoPruebas.java:18)
Caused by: org.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:136)
at org.drools.compiler.PackageBuilderConfiguration.buildEvaluatorRegistry(PackageBuilderConfiguration.java:550)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:170)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:300)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:228)
at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFaorg.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:136)
at org.drools.compiler.PackageBuilderConfiguration.buildEvaluatorRegistry(PackageBuilderConfiguration.java:550)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:170)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:300)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:228)
at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
at com.drools.optimizer.AppExpertSystem.readKnowledgeBase(AppExpertSystem.java:130)
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:115)
at com.drools.optimizer.AppExpertSystem.<init>(AppExpertSystem.java:46)
at eventlauncher.OptimizerLauncher.NuevoEscenario(OptimizerLauncher.java:57)
at eventlauncher.DemoPruebas.main(DemoPruebas.java:18)
Caused by: java.lang.ClassNotFoundException: Unable to load class: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:92)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:132)
... 12 more
Exception in thread "main" java.lang.RuntimeException: org.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:122)
at com.drools.optimizer.AppExpertSystem.<init>(AppExpertSystem.java:46)
at eventlauncher.OptimizerLauncher.NuevoEscenario(OptimizerLauncher.java:57)
at eventlauncher.DemoPruebas.main(DemoPruebas.java:18)
Caused by: org.drools.RuntimeDroolsException: Class not found for evaluator definition: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:136)
at org.drools.compiler.PackageBuilderConfiguration.buildEvaluatorRegistry(PackageBuilderConfiguration.java:550)
at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:196)
at org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:170)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:300)
at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:228)
at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilder(KnowledgeBuilderFactoryServiceImpl.java:34)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
at com.drools.optimizer.AppExpertSystem.readKnowledgeBase(AppExpertSystem.java:130)
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:115)
... 3 more
Caused by: java.lang.ClassNotFoundException: Unable to load class: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:92)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:132)
... 12 morectoryServiceImpl.java:34)
at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(KnowledgeBuilderFactory.java:46)
at com.drools.optimizer.AppExpertSystem.readKnowledgeBase(AppExpertSystem.java:130)
at com.drools.optimizer.AppExpertSystem.loadKnowledgeBase(AppExpertSystem.java:115)
... 3 more
Caused by: java.lang.ClassNotFoundException: Unable to load class: org.drools.base.evaluators.EqualityEvaluatorsDefinition
at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:92)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
at org.drools.base.evaluators.EvaluatorRegistry.addEvaluatorDefinition(EvaluatorRegistry.java:132)
... 12 more
My code is:
import com.answare.backendconnection.RESTConnection;
import com.answare.dataModel.ActionANS;
import com.answare.dataModel.CrisisContextANS;
import com.answare.db.QueriesDB;
import com.answare.settings.CTES;
import com.drools.utils.Event;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.*;
import org.drools.conf.EventProcessingOption;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import java.sql.SQLException;
/**
* This is the class that launch Expert System.
*/
public class AppExpertSystem {
StatefulKnowledgeSession ksession;
DSS_ANS optimizerDSS_ANS;
Event event;
RESTConnection restConnection;
public AppExpertSystem() {
loadKnowledgeBase();
optimizerDSS_ANS = new DSS_ANS(ksession);
event = new Event();
event.setNewEvent(true);
}
public AppExpertSystem(RESTConnection restConnection){
loadKnowledgeBase();
event = new Event();
event.setNewEvent(true);
this.restConnection = restConnection;
}
private void loadKnowledgeBase() {
// load up the knowledge base
KnowledgeBase kbase;
try {
kbase = readKnowledgeBase();
ksession = kbase.newStatefulKnowledgeSession();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
private static KnowledgeBase readKnowledgeBase() throws Exception {
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add(ResourceFactory.newClassPathResource(CTES.RULES),
ResourceType.DRL);
KnowledgeBuilderErrors errors = kbuilder.getErrors();
if (errors.size() > 0) {
for (KnowledgeBuilderError error : errors) {
System.err.println(error);
}
throw new IllegalArgumentException("Could not parse knowledge.");
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
KnowledgeBaseConfiguration config = KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
config.setOption(EventProcessingOption.STREAM );
return kbase;
}
public String executeMessage(CrisisContextANS crisisContext) {
try {
storeInDatabaseCrisis(crisisContext,true);
ksession.setGlobal("optimizerDSS", optimizerDSS_ANS);
ksession.insert(crisisContext);
this.event.setType("CrisisContextANS");
ksession.insert(this.event);
int num = ksession.fireAllRules();
if (num != 0) {
this.event.setNewEvent(false);
return ("Run OK from Expert System");
}
return ("");
} catch (Throwable t) {
t.printStackTrace();
return ("Run NOT OK Expert System");
}
}
}
And the exception is in the method readKnowledgeBase(), in line
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
The only thing that I'm doing is to call to AppExpertSystem constructor :( Any idea?
Thanks!
Upvotes: 0
Views: 2181
Answers (1)
laune
Reputation: 31300
This class is gone from the 5.5.0.Final distribution. It was present in 5.3.0 and 5.4.0 (jar: drools-core.jar), presumably also earlier.
org.drools.base and ...evaluators wasn't part of the stable API in 5.3 and 5.4, so using it was risky.
If you post how your code is using that class, s.o. might come up with a way to work around this mishap.
Class org.drools.base.evaluators.EqualityEvaluatorsDefinition is typically configured into the builder by including a line
drools.evaluator.equality = org.drools.base.evaluators.EqualityEvaluatorsDefinition
in a file "drools.packagebuilder.conf" in the working directory, your home directory or on some jar's META-INF drools.default.packagebuilder.conf, or on a file pointed to by a system property "drools.packagebuilder.conf".
Upvotes: 1
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