[jboss-user] [EJB 3.0] - How to get EnitityManager in SLSB without injection??

[ablevine1]

Does anyone know how to get an EntityManager refernce from withing a statelesss session bean without using injection?? I have tried the following but with no success:



  | EntityManagerFactory emf = getEntityManagerFactory("MyPersistenceUnitName");
  | EntityManager em = emf.createEntityManager();
  | 

but this just fails with the following exception:

  | javax.persistence.PersistenceException: No Persistence provider for EntityManager named PurchaseNotification
  |         at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:41)
  |         at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:27)
  |         at com.squaretrade.queueing.QueueingEngine.execute(QueueingEngine.java:36)
  |         at sun.reflect.GeneratedMethodAccessor221.invoke(Unknown Source)
  |         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |         at java.lang.reflect.Method.invoke(Method.java:585)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)
  |         at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)
  |         at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)
  |         at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
  |         at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)
  |         ... 40 more
  | 

When I use injection it works

  | @PersistenceContext(unitName = "MyPersistenceContext")
  | EntityManager em;
  | 

But I need be able to get refernces to EntityManagers for various different perstence units on the fly from within my session bean so injection is not an option.  any suggestions would be appreciated

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