6 Replies Latest reply: Oct 11, 2011 11:01 PM by August Huw RSS

    class loading of an inbound resource adapter?

    kgrunert Newbie

      Hello,

       

       

      I have just written an inbound resource adapter and everything seems to work fine with it. When I deploy my RA to the JBoss 7.0.1 AS, the container calls the ResourceAdapter.start(BootstrapContext ctx) method and I get a log message that the resource adapter has been started successfully.

       

      In the next step, I try to activate an endpoint for my MDB using the following annotations:

       

      ...
      import de.RATest.UDPMessageListener;
      
      @MessageDriven(messageListenerInterface = UDPMessageListener.class,
          activationConfig={
              @ActivationConfigProperty(propertyName = "port", propertyValue="15660")
      })
      public class UDPMessageDrivenBean implements UDPMessageListener{
      
           public void onMessage(String str){
              ...
          }
      }
      

       

      Unfortunately when I deploy the MDB, I end up with a NoClassDefFoundError and ClassNotFoundException for the MessageListener Interface:

       

      23:56:30,367 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC00001: Failed to start service jboss.deployment.subunit."MDB_RA_TEST.ear"."MDBs.war".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.subunit."MDB_RA_TEST.ear"."MDBs.war".INSTALL: Failed to process phase INSTALL of subdeployment "MDBs.war" of deployment "MDB_RA_TEST.ear"
          at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121)
          at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
          at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
          at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26]
          at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26]
          at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]
      Caused by: java.lang.LinkageError: Failed to link UDPMessageDrivenBean (Module "deployment.MDB_RA_TEST.ear.MDBs.war:main" from Service Module Loader)
          at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:401)
          at org.jboss.modules.ModuleClassLoader.loadClassLocal(ModuleClassLoader.java:261)
          at org.jboss.modules.ModuleClassLoader$1.loadClassLocal(ModuleClassLoader.java:76)
          at org.jboss.modules.Module.loadModuleClass(Module.java:588)
          at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:183)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
          at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
          at java.lang.Class.forName0(Native Method) [:1.6.0_26]
          at java.lang.Class.forName(Class.java:247) [:1.6.0_26]
          at org.jboss.as.ee.component.EEClassConfigurationProcessor$1.compute(EEClassConfigurationProcessor.java:124)
          at org.jboss.as.ee.component.EEClassConfigurationProcessor$1.compute(EEClassConfigurationProcessor.java:114)
          at org.jboss.as.ee.component.LazyValue.get(LazyValue.java:40)
          at org.jboss.as.ee.component.EEApplicationDescription.getClassConfiguration(EEApplicationDescription.java:183)
          at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentDescription.createConfiguration(MessageDrivenComponentDescription.java:78)
          at org.jboss.as.ee.component.EEModuleConfigurationProcessor.deploy(EEModuleConfigurationProcessor.java:63)
          at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115)
          ... 5 more
      Caused by: java.lang.NoClassDefFoundError: de/RATest/UDPMessageListener
          at java.lang.ClassLoader.defineClass1(Native Method) [:1.6.0_26]
          at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) [:1.6.0_26]
          at java.lang.ClassLoader.defineClass(ClassLoader.java:615) [:1.6.0_26]
          at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141) [:1.6.0_26]
          at org.jboss.modules.ModuleClassLoader.defineClass(ModuleClassLoader.java:397)
          ... 22 more
      Caused by: java.lang.ClassNotFoundException: de.RATest.UDPMessageListener from [Module "deployment.MDB_RA_TEST.ear.MDBs.war:main" from Service Module Loader]
          at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:191)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:358)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:330)
          at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:307)
          at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:101)
          ... 27 more
      

       

       

      I'm relatively new in the Java EE world and have not a lot of experiences with resource adapters, but this exceptions seems to me that the classes of the .RAR-file are not loaded correctly. I have read  parts of the specification and also tried a lot with different combinations of archives, for example:  a standalone .rar and a .ejb-jar file, everything inside of an .ear-file and a lot of other combination - but nothing has worked.

       

      I am actually not sure anymore, that  the resource adapter is completely correct. I have some questions that maybe could solve my problem:

      • do I need an JBoss specific deployment descriptor for the resource adapter?
      • do I have to modify the standalone-preview.xml also for an inbound resource adapter?
      • do I need something like the @ResourceAdapter annotation in my MDB?
      • if my  inbound resource adapter is correct, should I see it in the management console under "Connector" -> "Resource Adapters"?

       

      Here are some more facts, that could be important:

      • use of JCA 1.6
      • only annotations, so I have no ra.xml or ironjacamar.xml
      • I have started the standalone-preview.xml without any modifications
      • I have checked the RA with the ironjacamar validator and ended up with a "Validation successful"

       

      I have really no clue how to go on and hope that you can help me. To simplify matters I have attached the sources.

        • 1. Re: class loading of an inbound resource adapter?
          Jesper Pedersen Master

          do I need an JBoss specific deployment descriptor for the resource adapter?

           

          No, as your resource adapter is pure inflow you won't need that. Once you add a connection factory or an admin object you will need to add an ironjacamar.xml or define a <resource-adapter> entry in the subsystem.

           

          do I have to modify the standalone-preview.xml also for an inbound resource adapter?

           

          No, same as above.

           

          do I need something like the @ResourceAdapter annotation in my MDB?

           

          Yes, you will need to point it towards your deployment.

           

          if my  inbound resource adapter is correct, should I see it in the management console under "Connector" -> "Resource Adapters"?

           

          That is a TODO.

           

          If you don't deploy as an .ear file you will need to link the two deployments together using a META-INF/MANFEST.MF entry - see http://community.jboss.org/thread/169894 - like

           

          Dependencies: deployment.RA_UDP.rar
          

           

          inside your .jar file.

          • 2. Re: class loading of an inbound resource adapter?
            kgrunert Newbie

            Thank you for the answer - now the .jar-file resolves the dependencies correctly!

             

            I have also added the @ResourceAdapter annotation to the MDB, but another exception occurs:

             

            19:04:39,890 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-6) MSC00001: Failed to start service jboss.deployment.unit."UDPMsgBean.jar".component.UDPMessageDrivenBean.CREATE: org.jboss.msc.service.StartException in service jboss.deployment.unit."UDPMsgBean.jar".component.UDPMessageDrivenBean.CREATE: Failed to start service
                at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1786)
                at org.jboss.msc.service.ServiceControllerImpl$ClearTCCLTask.run(ServiceControllerImpl.java:2291)
                at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) [:1.6.0_26]
                at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) [:1.6.0_26]
                at java.lang.Thread.run(Thread.java:662) [:1.6.0_26]
            Caused by: java.lang.IllegalStateException: No resource adapter registered with resource adapter name RA_UDP
                at org.jboss.as.ejb3.component.EJBUtilities.createActivationSpecs(EJBUtilities.java:115)
                at org.jboss.as.ejb3.component.messagedriven.MessageDrivenComponentCreateService.createComponent(MessageDrivenComponentCreateService.java:76)
                at org.jboss.as.ee.component.BasicComponentCreateService.start(BasicComponentCreateService.java:78)
                at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1765)
                ... 4 more
            

             

            The same happens, if I deploy everything as  an .ear-file.

             

            Is there something incorrect with the value of the annotation? I have also tried "deployment.RA_UDP.rar", but it does not work.

            @ResourceAdapter("RA_UDP.rar")
            

             

            The exception says, that the resource adapter is not registered - isn't it done automatically?

             

            Any other ideas where the problem is?

            • 3. Re: class loading of an inbound resource adapter?
              Jesper Pedersen Master

              Yes, it is done automatically - and it should work as you have done it.

               

              We will take a look - thanks for the report.

              • 4. Re: class loading of an inbound resource adapter?
                August Huw Newbie

                I am facing the same problem, does anybody know the workaround or if this problem is fixed?

                • 5. Re: class loading of an inbound resource adapter?
                  Jesper Pedersen Master

                  Try the latest nightly build

                  • 6. Re: class loading of an inbound resource adapter?
                    August Huw Newbie

                    Hi Jesper,

                     

                    I tried the nightly build just now, no luck to get it work. I think there are some problem on JBoss AS 7/IronJacamar working on JCA. Wish someone would spend time to investigate the JCA (inbound/outbound RA) problem, such as this problem and another problem http://community.jboss.org/message/622860