[cdi-dev] CDI-136: Validation of passivation capability for SFSBs

[David Blevins]

That's exactly what Marina was saying.  The EJB spec does not explicitly require passivation.  The best we can do at the spec level is detail scenarios where it makes sense to explicitly restrict a vendor from doing so.


-David

On Jun 26, 2011, at 3:03 PM, Mark Struberg wrote:

> Marina,
> 
> EntityManagers are always stateful and _never_ safe to be assumed Serializable. Even if one JPA provider would provide a Serializable EntityManager (the only one I know is eBean, but it's not fully JPA compatible) you would end up creating a non-portable application!
> 
> LieGrue,
> strub
> 
> --- On Wed, 6/22/11, Marina Vatkina <marina.vatkina at oracle.com> wrote:
> 
>> From: Marina Vatkina <marina.vatkina at oracle.com>
>> Subject: Re: [cdi-dev] CDI-136: Validation of passivation capability for SFSBs
>> To: "Pete Muir" <pmuir at redhat.com>
>> Cc: "Carlo de Wolf" <cdewolf at redhat.com>, "Marina Vatkina" <Marina.Vatkina at sun.com>, "cdi-dev" <cdi-dev at lists.jboss.org>
>> Date: Wednesday, June 22, 2011, 9:10 PM
>> EJB spec usually doesn't mandate much
>> validation. The only issue that I've seen with SFSB
>> passivation was when it had a ref to an extended EM. It's
>> not clear what does it mean for an EM to be serializable
>> (the interface is not), so the JPA provider needs to be
>> involved. But that would be a question for the JPA spec.
>> Otherwise I haven't seen any requests...
>> 
>> My $.02.
>> 
>> -marina
>> 
>> Pete Muir wrote:
>>> All,
>>> 
>>> David Blevins raised this issue https://issues.jboss.org/browse/CDI-136 about CDI
>> overstepping the it's responsibilities and validating that
>> every SFSB must be passivation capable, not just those that
>> belong to passivation capable scopes in CDI.
>>> 
>>> I would assume this check was introduced because of a
>> misinterpretation of the EJB spec that *all* SFSBs are
>> passivation capable, not just some. Speaking to David, he
>> has indicated this is certainly not the case. In this case,
>> I think CDI is being somewhat presumptious and should
>> validate only the beans that it needs to (those that belong
>> to passivation capable scopes in CDI).
>>> 
>>> EJB does not offer up any metadata about whether a
>> SFSB is passivation capable, so I think this is the best we
>> can do. Might be something for the EJB EG to consider -
>> Marina, happy to raise there if you want?
>>> 
>>> I will create a pull req for this issue shortly with
>> the proposed fix, please comment on the issue as ever if you
>> do not agree with the fix, within the next two weeks.
>>> 
>>> Pete
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>> 
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