Well, both session beans use injection to obtain entity manager:
@PersistenceContext
private EntityManager em;
Both session beans belong to the same EJB module which uses JTA. Looks
like I should not have
em.contains(entity) == false in TransactionServiceBean, but that is
what happens :/
2007/7/4, Sahoo <Sahoo_at_sun.com>:
> How are you obtaining the em? Are you using the same persistence-unit in
> both the EJBs or not? Does this article [1] help you in resolving the issue?
>
> Thanks,
> Sahoo
>
> [1]
> http://weblogs.java.net/blog/ss141213/archive/2006/10/persistence_con.html
>
> Witold Szczerba wrote:
> > Hi there,
> > I have a situation, I do not know why, entity manager returns false in
> > the following case:
> >
> > there are two stateless session beans:
> >
> > @Stateless
> > public class LoanCacheServiceBean implements
> > LoanCacheServiceLocal, LoanCacheServiceRemote {
> > .........
> > public LoanCache getCache(Long loanId, Date date) {
> > .......
> > return loanCache; //<-- em.contains(loanCache) returns TRUE here
> > }
> > }
> >
> > @Stateless
> > public class TransactionServiceBean implements
> > TransactiondServiceLocal {
> >
> > @EJB
> > private LoanCacheServiceLocal loanCacheServiceBean;
> >
> > ..................
> > public void someMethod() {
> > LoanCache loanCache = loanCacheServiceBean.getCache(.....)
> > em.contains(loanCache); //NOW, loanCache IS FALSE, why?
> > }
> > }
> >
> >
> > As you can see, before getCache(...) returns, loanCache is managed by
> > entity manager, but inside someMethod() from another session bean,
> > that entity is not managed anymore. All is happening within same
> > transaction scope.
> >
> > When two entity managers are participating in the same transaction,
> > shouldn't they return the same result of em.contains(...) ?
> >
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>
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