[cdi-dev] [Vote] for CDI-527 / PR 271 allow proxying of classes with non-private final methods
Antoine Sabot-Durand
antoine at sabot-durand.net
Mon Feb 15 04:16:48 EST 2016
Guys,
As I said at the beginning, this thread is not about a pros and cons about
this feature. Everybody's agree that we should find a solution for this
ticket even if some of us (including me) start to find that the ratio value
for users on time spend discussed this is becoming very low.
It was about adding the PR proposed by Mark in the spec.
If I count the binding vote we have the following result
-1: 4
+1: 9
So according to the vote I should merge the PR right away. As there were a
lot of reserve in +1 vote I ask again to the -1 voters if they agree with
the merging of PR 271 which was the initial question.
Antoine
Le lun. 15 févr. 2016 à 09:29, Martin Kouba <mkouba at redhat.com> a écrit :
>
> Dne 13.2.2016 v 23:24 John D. Ament napsal(a):
> > Some comments in line.
> >
> > On Sat, Feb 13, 2016 at 4:22 PM David Blevins <david.blevins at gmail.com
> > <mailto:david.blevins at gmail.com>> wrote:
> >
> > Read what I could get my hands on. Unfortunately the JIRA itself
> > has 36 comments which won’t load/expand in Safari or Chrome. But I
> > think I get the summary.
> >
> >
> > Sounds like a not too responsive UI. I wonder if Atlassian has a test
> > for 36 comments. XD
> >
> >
> > High level, I agree with both Mark and Martin.
> >
> > - Agree with Mark: Where I see this feature being important is in
> > our EJB/CDI alignment efforts. This appears to be the rare case
> > where the CDI spec is more strict than the EJB spec and a speed bump
> > in someone’s efforts to port an EJB application to CDI. For that
> > reason, this to me upgrades from nice-to-have to we-must-find-a-way.
> >
> >
> > Yep, and in thinking about past jobs have run into the issue. People
> > don't read every line of a spec, and don't always understand why
> > something stopped working.
> >
> >
> > - Agree with Martin: I also strongly dislike the use of beans.xml
> > in any fashion and system properties even more. Aside from being
> > cumbersome for users, I’m particularly against setting a trend of
> > using system properties to bail us out of hard API design issues.
> > This concern trumps the above and I would -1 this vote as-is.
> >
> >
> > That said, I’m not sure if this approach is workable in any way, but
> > here goes:
> >
> > We keep the default rule of beans with final methods being
> > unproxyable unless explicit action in code is taken and the class is:
> >
> > - explicitly produced via @Produces
> > - added explicitly via an extension
> >
> >
> > I don't see a reason that the bean manager needs to ignore classes with
> > final methods. More-so, I don't see the strategy as being
> > comprehensible to the typical developer that they need a producer.
> > Sure, for 3PL's you're probably already creating a producer. For cases
> > where I just made my class with a final method, I shouldn't be penalized.
> >
> > Less boilerplate, that's one of the goals right? If so, I don't see why
> > we can't just deal with a final method in a proxy - don't extend it.
>
> Do you mean to simply ignore the method? If we do (the current
> non-portable solution of OWB and Weld) a user might be suprised why a
> method invoked on a proxy does not reach the target instance (it will be
> invoked upon a client proxy instance). Miserable default behavior I
> believe. And this will happen for a client proxy for non-interface bean
> types.
>
> >
> > The gotcha that I still see is around interceptor bindings. They need
> > to be explicitly disallowed on final methods, and big ole warning put in
> > when you have interceptors on classes with final methods.
> >
> >
> > Effectively the BeanManager would continue to ignore beans with
> > final methods as proxyable in a classpath scan, but the application
> > could “go back” and explicitly put them into the BeanManager as
> > proxyable.
> >
> >
> > Thoughts? Big holes in there?
> >
> >
> >
> > -David
> >
> >
> >> On Feb 12, 2016, at 9:19 AM, Antoine Sabot-Durand
> >> <antoine at sabot-durand.net <mailto:antoine at sabot-durand.net>> wrote:
> >>
> >> Hi Guys,
> >>
> >> Some EG members (like David Blevins) asked to have until the ned
> >> of the week-end to vote here.
> >> I find interesting to have the more possible input but as the
> >> rules were to end the vote tonight, I wanted to be sure that
> >> nobody has any objection for closing the vote on sunday 11:59pm CET.
> >>
> >> Regards,
> >>
> >> Antoine
> >>
> >> Le ven. 12 févr. 2016 à 17:23, Mark Struberg <struberg at yahoo.de
> >> <mailto:struberg at yahoo.de>> a écrit :
> >>
> >> Sure, that might probably be a viable way to do it.
> >>
> >> Oki, here are the two use cases which we need to solve:
> >>
> >> 1.)
> >> @Produces
> >> @ApplicationScoped
> >> public SomeWeirdThirdPartyClassWithFinalMethods createIt()
> >> {return …};
> >>
> >> 2.)
> >> @ApplicationSCoped
> >> public class MySubclass extends
> >> SomeWeirdThirdPartyClassWithFinalMethods {}
> >>
> >> Any other use case?
> >>
> >> Can you please elaborate how your idea will look like? Just a
> >> few ideas so we can get it running.
> >>
> >> txs and LieGrue,
> >> strub
> >>
> >>
> >> PS: Again: I’m NOT interested to get my approach in. All I’m
> >> interested in is a _solution_ for this real world problem. But
> >> there was simply no alternative proposed so far…
> >>
> >>
> >>
> >> > Am 12.02.2016 um 17:12 schrieb Pete Muir <pmuir at redhat.com
> >> <mailto:pmuir at redhat.com>>:
> >> >
> >> > -1
> >> >
> >> > The problem seems real, but proposed approach doesn't sit
> >> right with
> >> > me. I think it would be better to follow the EJB approach,
> >> and add a
> >> > way to be able to declare a method as "not a business method"
> (a
> >> > business method is also a thing in CDI IIRC).
> >> >
> >> > For example, e.g. using beans.xml and an annotation. This
> >> then allows
> >> > the spec to consistently treat this public method as not a
> >> business
> >> > method.
> >> >
> >> > On 9 February 2016 at 16:36, Antoine Sabot-Durand
> >> > <antoine at sabot-durand.net <mailto:antoine at sabot-durand.net>>
> >> wrote:
> >> >> Hi all,
> >> >>
> >> >> There have been a lot of discussion around CDI-527 in the
> >> last weeks:
> >> >> https://issues.jboss.org/browse/CDI-527
> >> >>
> >> >> Mark proposed a PR:
> >> >> https://github.com/cdi-spec/cdi/pull/271
> >> >>
> >> >> But we don't agree on adding this feature to the spec.
> >> >> This vote is to decide if we should add this feature at the
> >> spec level now,
> >> >> or not.
> >> >> Should we vote this feature down, that won't mean it will
> >> be completely
> >> >> dropped: it could be implemented as non portable feature in
> >> both Spec or
> >> >> even be included as experimental feature in the spec (in
> >> annexes) as
> >> >> describe in the PR comments
> >> >> Vote starts now, only vote from EG members are binding (but
> >> you can give
> >> >> your opinion if not part of the EG) and will last 72 hours.
> >> >>
> >> >> You vote with the following values:
> >> >> +1 : I'm favorable for adding this feature in the spec
> >> >> -1 : I'm against adding this feature in the spec
> >> >> 0 : I don't care
> >> >>
> >> >> Thank you for your attention and your vote.
> >> >>
> >> >> Antoine Sabot-Durand
> >> >>
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> --
> Martin Kouba
> Software Engineer
> Red Hat, Czech Republic
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