Create a entity using a session bean in web dynpro

Question

Hi.
I want to create an entity bean object trough an EJB session bean in web dynpro, e.g using a form in a WD application filled in by a user.
I understand how to display a list of entity beans through a session bean and a table, but I don't understand how to create (or edit or remove) such information.
My session beans look like this:
@Stateless
public class MyObjectBean implements MyObjectLocal {
     @PersistenceContext(name = "MyObject", unitName="ProjectPU")
     public EntityManager em;
     public void create(MyObject myObject) {
          em.persist(myObject);
     public void edit(MyObject myObject) {
          em.merge(myObject);
     public void remove(MyObject myObject) {
          em.remove(em.merge(myObject));
     public MyObject find(Integer id) {
          return em.find(MyObject.class, id);
     @SuppressWarnings("unchecked")
     public List<MyObject> findAll() {
          return em.createNamedQuery("MyObject.findAll").getResultList();
So the model class would be called Request_MyObjectLocal_create.
I attempted to use [this|http://help.sap.com/saphelp_nwce10/helpdata/en/45/dd45e4bc295595e10000000a1553f7/frameset.htm] help file but I find the answer (step 17) quite unclear.
Help is greatly appreciated!
Vincent.

Answer 1

I've just found the solution from Steve Muench weblog, always useful by the way!
You can find the solution at this link http://radio.weblogs.com/0118231/stories/2004/05/07/handcodingDynamicDiscoveryOfEjbdeployedAppmodule.html
In summary, we need to use the class com.evermind.server.rmi.RMIInitialContextFactory, which supports dynamic lookup, and implement the lookup ourselves.
The code I've written to lookup the service is listed below:
public static ApplicationModule getAppModuleManutencao() {
try {
Context ctx = getContext();
ManutencaoFacadeHome home = (ManutencaoFacadeHome) ctx.lookup(EJB_MANUTENCAO_BEAN_NAME);
ApplicationModule am = ApplicationModuleProxy.create(home, null);
return am;
} catch (NamingException nex) {     
nex.printStackTrace();
return null;
private static InitialContext getContext() {   
try {     
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "com.evermind.server.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "admin");
env.put(Context.SECURITY_CREDENTIALS, "welcome");
env.put(Context.PROVIDER_URL, "opmn:ormi://dsv008:OC4J_dvt20/mct");
env.put(Context.SECURITY_AUTHENTICATION, "simple");
return new InitialContext(env);
}catch (NamingException e) {     
e.printStackTrace();
return null;
I hope this helps someone!!!
Cheers!