3 Replies Latest reply on May 8, 2008 8:49 AM by fermat

    RuntimeException using Statefull Session Bean in Session Context

    fermat
    fermat May 7, 2008 5:36 PM

      Hello,


      I have written a SEAM-Application containing the following Statefull SessionBean:


      package de.upb.vdrive.mda.connectors.proxy;



      import java.util.List;

import javax.ejb.Stateful;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.PersistenceContextType;

import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;

import de.upb.vdrive.mda.component.*;
import de.upb.vdrive.mda.configuration.PhysicalDiskManager;

import static org.jboss.seam.ScopeType.SESSION;

@Stateful
@Name("RemoteConnector")
@Scope(SESSION)
public class ProxyConnectorBean implements ProxyConnectorRemote {

     @PersistenceContext(type = PersistenceContextType.EXTENDED)
     private EntityManager entityManager;

     @In
     private PhysicalDiskManager physicalDiskManager;

     private Server server;

     public Server setServerByIP(String ip) {
          server = (Server) entityManager.createQuery(
                    "select a from Server a where ip=" + ip).getSingleResult();
          return server;
     }

     public List<PhysicalDisk> getVisiblePhysicalDisks() {
          return server.getPhysicalDisks();
     }

     public List<ServerPhysicalDiskConnection> getVisiblePhysicalDiskConnections() {
          return server.getPhysicalDiskConnections();
     }

     @SuppressWarnings("unchecked")
     public List<PhysicalDisk> getAllPhysicalDisks() {
          return physicalDiskManager.getPhysicalDisks();
     }

}



      Following the Remote Interface:


      package de.upb.vdrive.mda.connectors.proxy;

import java.util.List;

@Remote
public interface ProxyConnectorRemote {

     public Server setServerByIP(String ip);

     public List<PhysicalDisk> getVisiblePhysicalDisks();

     public List<ServerPhysicalDiskConnection> getVisiblePhysicalDiskConnections();

     public List<PhysicalDisk> getAllPhysicalDisks();
}



      Local Interface is mostly same. Deploying this using SEAM 2.0.1 and JBoss 4.2.2 I get the folloging resilt:



      17:24:25,451 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.core.locale
      17:24:25,457 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.core.resourceLoader
      17:24:25,458 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.web.userPrincipal
      17:24:25,461 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.core.locale
      17:24:25,484 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.core.manager
      17:24:25,488 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.core.expressions
      17:24:25,489 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.persistence.persistenceProvider
      17:24:25,489 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.security.identity
      17:24:25,490 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.web.parameters
      17:24:25,522 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.bpm.businessProcess
      17:24:25,523 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.web.isUserInRole
      17:24:25,524 INFO  [Initialization] two components with same name, higher precedence wins: org.jboss.seam.transaction.synchronizations
      17:24:25,557 INFO  [Component] Component: org.jboss.seam.core.init, scope: APPLICATION, type: JAVA_BEAN, class: org.jboss.seam.core.Init
      17:24:25,584 WARN  [Initialization] Did not install PojoCache due to NoClassDefFoundError: org/jgroups/MembershipListener
      17:24:25,585 INFO  [Initialization] Installing components...
      17:24:25,608 INFO  [Component] Component: RemoteConnector, scope: SESSION, type: STATEFUL_SESSION_BEAN, class: de.upb.vdrive.mda.connectors.proxy.ProxyConnectorBean, JNDI: mda2008/ProxyConnectorBean/local
      17:24:25,610 ERROR [[/mda2008]] Exception sending context initialized event to listener instance of class org.jboss.seam.servlet.SeamListener
      java.lang.RuntimeException: Could not create Component: RemoteConnector
              at org.jboss.seam.init.Initialization.addComponent(Initialization.java:976)
              at org.jboss.seam.init.Initialization.installComponents(Initialization.java:898)
              at org.jboss.seam.init.Initialization.init(Initialization.java:576)

      [...]



      I am not sure if the info messages (two components with same name) have been there before. Can anyone tell me why I get this RuntimeException?