[rules-users] JBoss AS 4.0.5 GA + Drools 4.0.1

[Guardian]

Hello,

I have many problems to integrate Drools in my existing Application that is
running on JBoss AS 4.0.5 GA. 

When I try to load and execute the rule-file I get the following Exception:

 

java.lang.RuntimeException: java.lang.NoSuchMethodError:
org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/eclip
se/jdt/core/compiler/CategorizedProblem;

javax.ejb.EJBException: java.lang.RuntimeException:
java.lang.NoSuchMethodError:
org.eclipse.jdt.internal.compiler.CompilationResult.getProblems()[Lorg/eclip
se/jdt/core/compiler/CategorizedProblem;

      at
org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:69)

      at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)

      at
org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:191)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationIntercepto
r.java:76)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstan
ceInterceptor.java:62)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationIn
terceptor.java:77)

      at
org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3Authenticat
ionInterceptor.java:102)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.ja
va:47)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInter
ceptor.java:106)

      at
org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:10
1)

      at
org.jboss.ejb3.stateless.StatelessContainer.dynamicInvoke(StatelessContainer
.java:263)

      at org.jboss.aop.Dispatcher.invoke(Dispatcher.java:106)

      at
org.jboss.aspects.remoting.AOPRemotingInvocationHandler.invoke(AOPRemotingIn
vocationHandler.java:82)

      at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:828)

      at org.jboss.remoting.ServerInvoker.invoke(ServerInvoker.java:681)

      at
org.jboss.remoting.transport.socket.ServerThread.processInvocation(ServerThr
ead.java:358)

      at
org.jboss.remoting.transport.socket.ServerThread.dorun(ServerThread.java:412
)

 

 

 

 

 

My Application consists of the following parts:

 

The rule-file:

#created on: 04.09.2007

package drools.rules

 

#list any import classes here.

import drools.session.Message;

 

#declare any global variables here

 

rule "Hello World"

      when

            m : Message( status == Message.HELLO, message : message )

      then

            System.out.println( message ); 

            m.setMessage( "Goodbye cruel world" );

            m.setStatus( Message.GOODBYE );

            update( m );

end

 

rule "GoodBye"

      no-loop true

      when

            m : Message( status == Message.GOODBYE, message : message )

      then

            System.out.println( message ); 

            m.setMessage( message );

            

end

 

 

 

a Class to encapsulate the rule-initialisation and rule-execution
(wrapper-Class):

 

public class RuleEngineWrapper 

{

      

        private WorkingMemory workingMemory;

 

        private boolean debugMode = false;

 

        private DebugAgendaEventListener debugListener;

 

        

        public RuleEngineWrapper(WorkingMemory wm) {

            this.workingMemory = wm;

            debugListener = new DebugAgendaEventListener();

        }

        

        /**

         * construct a RuleEngineWrapper with only a rule-file-name, no idea
of

         * callers' class. Assume the rule file is located

         * 

         * @param rulesFile

         */

        public RuleEngineWrapper(String rulesFile) {

            this(RuleEngineWrapper.class, rulesFile);

        }

 

        /**

         * construct a RuleEngineWrapper with only a calling object known

         * 

         * @param caller

         * @param rulesFile

         */

        public RuleEngineWrapper(Object caller, String rulesFile) {

            this(caller.getClass(), rulesFile);

        }

 

        /**

         * construct a RuleEngineWrapper with Class caller and
rule-file-name known.

         * We load the rule-file as classpath resource.

         * 

         * @param caller

         * @param rulesFile

         */

        public RuleEngineWrapper(Class caller, String rulesFile) {

            super();

            try {

                final PackageBuilder builder = new PackageBuilder();

                System.out.println(caller);

 

                builder.addPackageFromDrl(new InputStreamReader(caller

                        .getResourceAsStream(rulesFile)));

 

                final RuleBase ruleBase = RuleBaseFactory.newRuleBase();

                ruleBase.addPackage(builder.getPackage());

 

                workingMemory = ruleBase.newStatefulSession();

 

                debugListener = new DebugAgendaEventListener();

 

            } catch (Exception e) {

                System.out.println("cannot read rule file: " + rulesFile);

            }

        }

 

 

        /**

         * Allow to add arbitrary objects as facts. Users can add any
objects to

         * workingMemory

         * 

         * @param o

         *            the fact to be added

         */

        public void addFact(Object o) {

            workingMemory.insert(o);

        }

 

        /**

         * Execute rules.

         * 

         */

        public void executeRules() {

            workingMemory.fireAllRules();

        }

 

        /**

         * toggle debugging mode (adds a DebugAgendaEventListener if called
once.

         * Removes if called again.

         */

        public void setDebugMode( boolean debug ) {

            if (debugMode ) {

                workingMemory.removeEventListener( debugListener );

            }

            else workingMemory.addEventListener(debugListener);

 

        }

 

            public WorkingMemory getWorkingMemory() {

                  return workingMemory;

            }

 

            public void setWorkingMemory(WorkingMemory workingMemory) {

                  this.workingMemory = workingMemory;

            }

}

 

 

A stateless Sessionbean for the access from the Testcase

@Remote(droolsManagement.class)

public @Stateless class droolsManagementBean implements droolsManagement 

{

      public void startRuleEngineWrapper(String rulesFile, ArrayList<Object>
objektListe) throws Exception

      {

            try 

            {   

                  //load up the rulebase + StatefulSession (WorkingMemory)

                  RuleEngineWrapper rew = new
RuleEngineWrapper("/drools/rules/" + rulesFile);

                  

                  for (Object object : objektListe) 

                  {

                    rew.addFact(object);

                  }

                  

                  rew.executeRules();

            } 

            catch (Exception e) 

            {

            System.out.println("exception in
'droolsManagementBean.startRuleEngineWrapper(String, ArrayList<Object>)',
cannot handle it...");

        }

      }

}

 

 And the test-case:

@Test

      public void TestDroolsRuleEngineWrapper()

      {

            

            try

            {

                  String rulesFile = "testRule.drl";

                  

                   //go !

                  Message message = new Message();

                  message.setMessage(  "Hello World" );

                  message.setStatus( Message.HELLO );

                  

                  ArrayList<Object> objektListe = new ArrayList<Object>();

                  objektListe.add(message);

                          

                  droolsM.startRuleEngineWrapper(rulesFile, objektListe);

              

                  

            }

            catch (Exception e) 

            {

                  System.out.println("Exception in
TestDroolsRegeln.TestDroolsRuleEngineWrapper: " + e.getMessage());

                  e.printStackTrace();

            }

      }

 

 

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