[jboss-user] [EJB 3.0] - tx attributte - supports doesn't work as expected

[adamzrk]

Hi

 I've got an EJB:

  | @Stateless
  | @TransactionAttribute(TransactionAttributeType.SUPPORTS)
  | public class AirportDaoBean implements AirportDaoLocal, AirportDaoRemote {
  | 
  | 	@PersistenceContext
  | 	private EntityManager manager;
  | 	
  | 	@Override
  | 	public void createAirport(Airport airport) {
  | 		manager.persist(airport);
  | 	}
  | 
  | 	@Override
  | 	public Airport getAirportById(int id) {
  | 		return manager.find(Airport.class, id);
  | 	}
  | 
  | 	@Override
  | 	public List<Airport> getAll() {
  | 		return manager.createQuery("from Airport order by city.country.name").getResultList();
  | 	}
  | 
  | }
  | 

As you can see I configured it with SUPPORTS transaction attribute, so when there is a transaction all methods in my bean will use it, when there is no transaction context then bean wouldn't begin a new one. So my question is: why i get the exception:

  | Caused by: javax.persistence.TransactionRequiredException: EntityManager must be access within a transaction
  |         at org.jboss.ejb3.entity.ManagedEntityManagerFactory.verifyInTx(ManagedEntityManagerFactory.java:150)
  |         at org.jboss.ejb3.entity.TransactionScopedEntityManager.persist(TransactionScopedEntityManager.java:174)
  |         at master.airport.logic.impl.AirportDaoBean.createAirport(AirportDaoBean.java:24)
  |         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:597)
  |         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(TransactionScopedEntityManagerIntercepto
  | 

Regards
Adam

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