[jboss-user] [JBoss Seam] - IllegalStateException: EntityManager is closed (on event sco

[MSchmidke]

Seam 2.0.GA

Hello all,

I am accessing Hibernate session via JPA delegate as suggested in chapter 8.4. So I have the following lines in my components.xml:


  | <persistence:managed-persistence-context name="entityManager" auto-create="true" persistence-unit-jndi-name="java:/EntityManagerFactories/Argos3EJBPU" />
  | <factory name="session" scope="STATELESS" auto-create="true" value="#{entityManager.delegate}" />
  | 

This allows the Hibernate session to be injected into my Session Bean.

This worked very well for me until I first time used an EVENT scoped stateful session bean.

With the event scoped bean, there is a problem in the @Remove method (the method is empty, but Seam requires one to be there) which gives the following exception:

  | 13:02:25,091 WARN  [Component] Exception calling stateful session bean default @Remove method: aufgabenliste
  | javax.ejb.EJBException: javax.el.ELException: Error reading 'delegate' on type org.jboss.seam.persistence.EntityManagerProxy
  | 	at org.jboss.ejb3.tx.Ejb3TxPolicy.handleExceptionInOurTx(Ejb3TxPolicy.java:63)
  | 	at org.jboss.aspects.tx.TxPolicy.invokeInOurTx(TxPolicy.java:83)
  | 	...
  | Caused by: javax.el.ELException: Error reading 'delegate' on type org.jboss.seam.persistence.EntityManagerProxy
  | 	at javax.el.BeanELResolver.getValue(BeanELResolver.java:66)
  | 	at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
  | 	at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64)
  | 	at org.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53)
  | 	at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
  | 	at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
  | 	at org.jboss.seam.core.Expressions$1.getValue(Expressions.java:112)
  | 	at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1906)
  | 	...
  | Caused by: java.lang.IllegalStateException: EntityManager is closed
  | 	at org.hibernate.ejb.EntityManagerImpl.getSession(EntityManagerImpl.java:42)
  | 	at org.hibernate.ejb.AbstractEntityManagerImpl.getDelegate(AbstractEntityManagerImpl.java:570)
  | 	at org.jboss.seam.persistence.EntityManagerProxy.getDelegate(EntityManagerProxy.java:95)
  | 	...
  | 

Am I doing something wrong or is this an error?

Marcus.


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