Calling EJB method

Question

Hi All,
I have never worked with EJBs so I am kind of stuck with one problem.
I have to make use of one existing EJB project through my external standard java class. The existing EJB project makes use of some other packages which are also EJB projects and I am not allowed to change any functionality of the EJB project but to use them as it is.
I am just initilizing the class object of the EJB project and calling its method. Within the EJB project there is a method which is calling another method of another EJB class.
The problem is that I dont see this other EJB class object getting initilized first and then calling its method as it happens in a normal scenario, hence when that method gets called i get a null pointer execption.
Let me give you some idea by posting some code snippet.
@WebService(targetNamespace = "http://www.ttt.de/ota")
@SOAPBinding(style = SOAPBinding.Style.DOCUMENT, use = SOAPBinding.Use.LITERAL, parameterStyle = SOAPBinding.ParameterStyle.BARE)
// standard EJB3 annotations
@Local(AMSAgencyWSPortType.class)
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
// jboss propriatary annotations
@WebContext(transportGuarantee = "NONE", secureWSDLAccess = false)
public class AMSProfileServiceBean extends AbstractProfileBuilder implements AMSAgencyWSPortType
  private static Log log = LogFactory.getLog(AMSMappingServiceBean.class);
  @EJB(mappedName = "PotsdamProfileService/local")
  private PotsdamProfileService profileService;
  private Security              security;
  @EJB
  private OTAProfileBuilder     otaProfileBuilder;
@Override
  public OTATTProfileReadRS otaTTReadRQ(Holder<Security> wsseHeader, OTATTReadRQ request)
     security = wsseHeader.value;
     BigDecimal requestVersion = request.getVersion();
     OTATTProfileReadRS otaProfileReadRS = new OTATTProfileReadRS();
     otaProfileReadRS.setVersion(requestVersion);
     PotsdamInstanceKey profileIntanceKey;
    try
      profileIntanceKey = getKeyHandler(requestVersion).buildUserKey(wsseHeader);
      PotsdamInstance userInstance = loadProfileFromPotsdam(profileIntanceKey);
private PotsdamInstance loadProfileFromPotsdam(PotsdamInstanceKey userCredentials) throws PotsdamException
       PotsdamInstance potsdamInstance = null;
       try{
    Holder<com.ttt.potsdam.common.messages.Security> wsseHeader = buildWsseHeader(security);
    ProfileResponse potsdamInstanceRS = profileService.loadProfile(wsseHeader, userCredentials);
...I get an error message before the sequence reaches loadProfile(..), which in my sense is due to the fact that 'profileService' never was initilized in the EJB project.
profileService is object of another EJB project, which looks somethign like this:
@Stateless
@LocalBinding(jndiBinding = "PotsdamProfileService/local")
// jboss 4.2
@org.jboss.annotation.ejb.LocalBinding(jndiBinding = "PotsdamProfileService/local")
public class PotsdamProfileServiceBean implements PotsdamProfileService {
     private static Log log = LogFactory.getLog(PotsdamProfileServiceBean.class);
     @EJB
     private CacheProfileService cacheProfileService;
     @EJB(mappedName = "/PersistenceUnitsManagerBean/local")
     private PersistenceUnitsManager persistenceUnitsManager;
     @EJB
     private PotsdamService potsdamService;
     public ProfileResponse loadProfile(Holder<Security> wsseHeader,
               PotsdamInstanceKey cacheInstanceKey) {
           log.debug("inside  loadProfile");
...Now I am calling the main EJB like this:
PotsdamotaTTReadRQ();
public OTATTProfileReadRS PotsdamotaTTReadRQ()
       AMSProfileServiceBean a = new AMSProfileServiceBean();
       Holder<Security> wsseHeader = new Holder<Security>();
       OTATTProfileReadRS response = a.otaTTReadRQ(wsseHeader, request);
       return response;
  }So my confusion is how can I make use of profileService.loadProfile(wsseHeader, userCredentials); ??
I tried to initilize: PotsdamProfileServiceBean profileService = new PotsdamProfileServiceBean();but I get jndi binding and lots of other exception.
Please help.
Edited by: 925515 on 04.07.2012 06:40

Answer 1

Thanks for your pointer. Could you please help me out with a small code snippet example?
I want to make use of this existing bean (AMSProfileServiceBean ):
@WebService(targetNamespace = "http://www.ttt.de/ota")
@SOAPBinding(style = SOAPBinding.Style.DOCUMENT, use = SOAPBinding.Use.LITERAL, parameterStyle = SOAPBinding.ParameterStyle.BARE)
// standard EJB3 annotations
@Local(AMSAgencyWSPortType.class)
@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRES_NEW)
// jboss propriatary annotations
@WebContext(transportGuarantee = "NONE", secureWSDLAccess = false)
public class AMSProfileServiceBean extends AbstractProfileBuilder implements AMSAgencyWSPortType
  private static Log log = LogFactory.getLog(AMSMappingServiceBean.class);
  @EJB(mappedName = "PotsdamProfileService/local")
  private PotsdamProfileService profileService;
  private Security              security;
  @EJB
  private OTAProfileBuilder     otaProfileBuilder;
  @EJB
  private OTAProfileUpdater     otaProfileUpdater;
@Override
  public OTATTProfileReadRS otaTTReadRQ(Holder<Security> wsseHeader, OTATTReadRQ request)
...in my soap-connector :
@WebServiceProvider(wsdlLocation = "WEB-INF/wsdl/PotsdamAMSAgencyWS.wsdl", targetNamespace = "http://www.ttt.de/ota", serviceName = "PotsdamAMSAgencyWS", portName = "PotsdamAMSAgencyWSPortType")
@ServiceMode(value = Service.Mode.MESSAGE)
public class PotsdamAgencyWSProvider extends WSProvider implements Provider<SOAPMessage>
  @Resource
  WebServiceContext     wsCtx;
...A small example would be really appreciated.
Thanks.