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From José Luis Cetina <maxtorz...@gmail.com>
Subject Re: Fetch without transaction
Date Wed, 30 Oct 2013 16:12:38 GMT
Is injected @PersistenceContex


@Stateless
@TransactionAttribute(TransactionAttributeType.REQUIRED)
@TransactionManagement(TransactionManagementType.CONTAINER)
public class MenusFacade implements MenusFacadeLocal {

    @PersistenceContext(unitName =
BusinessLayerUtils.KX_GLOBAL_PERSISTENCE_UNIT_NAME)
    private EntityManager em;
............


2013/10/30 Romain Manni-Bucau <rmannibucau@gmail.com>

> Hi
>
> is your entity manager created manually or managed?
> Romain Manni-Bucau
> Twitter: @rmannibucau
> Blog: http://rmannibucau.wordpress.com/
> LinkedIn: http://fr.linkedin.com/in/rmannibucau
> Github: https://github.com/rmannibucau
>
>
>
> 2013/10/30 José Luis Cetina <maxtorzito@gmail.com>:
> > From http://docs.oracle.com/javaee/6/tutorial/doc/bncij.html
> >
> > Supports Attribute
> >
> > If the client is running within a transaction and invokes the enterprise
> > bean’s method, the method executes within the client’s transaction. If
> the
> > client is not associated with a transaction, the container does not
> start a
> > new transaction before running the method.
> >
> > Because the transactional behavior of the method may vary, you should use
> > the Supports attribute with caution.
> >
> >
> > The problem is that im calling my ejb directly from my managedbean
> (@named)
> > and of course the "client" doesn't have any transaction and the behavior
> is
> > the same, i could not fecth using eager, fetch
> > or getFetchPlan().addFetchGroup() any of this work with SUPPORTS.
> >
> >
> > Then as i can see the only way is to use REQUIRED, because i use
> stateless,
> > but this let me thinking, why this work
> > with @TransactionManagement(TransactionManagementType.BEAN)? , with Bean
> > transaction i don't have to star any transaction for use a fetch
> >
> >
> > 2013/10/30 Jean-Louis MONTEIRO <jeanouii@gmail.com>
> >
> >> oups, message sent too quickly ...
> >>
> >> SUPPORTS is usually fine as a default for "finder" methods.
> >> As soon as there is no transaction, an entity is detached when returned
> by
> >> the entity manager.
> >> Even with SUPPORTS btw
> >>
> >> When REQUIRED (or any transaction) is used, the entity remains attached
> and
> >> managed my the persistence context till the end of the transaction by
> >> default.
> >>
> >> For an EPC in a Stateful, it's a bit different.
> >> So I'd say you have the desired behavior as per the spec.
> >>
> >> JLouis
> >>
> >>
> >>
> >> 2013/10/30 Jean-Louis MONTEIRO <jeanouii@gmail.com>
> >>
> >> > SUPPORTS is fine then
> >> >
> >> >
> >> > 2013/10/30 José Luis Cetina <maxtorzito@gmail.com>
> >> >
> >> >> Sorry if i post here, i posted this some days ago, but in openjpa
> >> mailing
> >> >> list somethings you dont get answer's, i hope somebody can help.
> >> >>
> >> >>
> >> >> Hi, i have a problem, im changing my ejbs from
> >> >>
> >> >> @TransactionManagement(TransactionManagementType.BEAN)
> >> >>
> >> >> to
> >> >>
> >> >> @TransactionAttribute(TransactionAttributeType.REQUIRED)
> >> >> @TransactionManagement(TransactionManagementType.CONTAINER)
> >> >>
> >> >> My ejb methods that only performs read only querys are marked with
> >> >> @TransactionAttribute(TransactionAttributeType.NOT_SUPPORTED) because
> >> they
> >> >> are read only, this works as expected. But when i try to fetch some
> >> >> properties from my entity that is marked as LAZY i could never
> retrieved
> >> >> because is null. If i mark my entity property (list) with EAGER or
> if i
> >> >> mark my method with
> >> >> @TransactionAttribute(TransactionAttributeType.REQUIRED) all works.
> >> >>
> >> >> So my question is, do i have to use a transaction for read only
> querys
> >> >> that
> >> >> need any kind of fetch, if yes, Why???
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > Jean-Louis
> >> >
> >>
> >>
> >>
> >> --
> >> Jean-Louis
> >>
> >
> >
> >
> > --
> > -------------------------------------------------------------------
> > *SCJA. José Luis Cetina*
> > -------------------------------------------------------------------
>



-- 
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*SCJA. José Luis Cetina*
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