Pb Initializing database on app startup with postInitializat

[zdaler]

I launch a method on application startup using the org.jboss.seam.postInitialization event. It work fine except if I access the database (and I need to) :

using seam managed entity manager :

@In
 private EntityManager em;

@Observer("org.jboss.seam.postInitialization")
private void setupAFewThings() throws ComentSystemException {
 MyObject w = new MyObject() ;
 w.setName("test_name") ;
 em.getTransaction().begin();
 em.persist(w) ;
 em.getTransaction().commit();
}

or manually creating a new entity manager like this :

@Observer("org.jboss.seam.postInitialization")
private void setupAFewThings() throws ComentSystemException {
 MyObject w = new MyObject() ;
 w.setName("test_name") ;
 EntityManagerFactory emf = Persistence.createEntityManagerFactory("myDatabase");
 EntityManager em = emf.createEntityManager();
 em.getTransaction().begin();
 em.persist(w) ;
 em.getTransaction().commit();
}

I get the same error ("java.lang.IllegalStateException: JTA EntityManager cannot access a transactions") :

16:26:18,530 ERROR [[/coment_demo]] Exception lors de l'envoi de l'évènement contexte initialisé (context initialized) à l'instance de classe d'écoute (listener) org.jboss.seam.servlet.SeamListener
java.lang.IllegalStateException: JTA EntityManager cannot access a transactions
at org.hibernate.ejb.AbstractEntityManagerImpl.getTransaction(AbstractEntityManagerImpl.java:316)
at com.sopinspace.coment.core.WorkflowManager.addDefaultWorkflow(WorkflowManager.java:53)
at com.sopinspace.coment.core.WorkflowManager.create(WorkflowManager.java:62)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)

Any help ?

[christian.bauer]

em.getTransaction() is for resource-local transaction demarcation, i.e. Java SE.

In Java EE you need to use JTA, either through the javax.transaction.UserTransaction API (Seam has a wrapper component, or do a JNDI lookup) or through CMT on an EJB.