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From Thomas Frühbeck <fruehb...@aon.at>
Subject Re: Data module and serializability in cluster w/ distributable session
Date Tue, 16 Dec 2014 23:41:19 GMT
Thank you all for confirming the approach using @ApplicationScoped.

@Karl thanks for the "wrapping techinque", an interesting twist I hope 
to investigate a bit :-)

Best regards,
Thomas

Am 16.12.2014 um 22:20 schrieb Karl Kildén:
> Sorry that's not what I meant. I use the "wrapping technique". A @Stateless
>   and I inject the repositories in it. My repositories are just from the
> minimal example ie. no scopes, but maybe they should be @ApplicationScoped
> I don't know the pros and cons.
>
>
> On 16 December 2014 at 21:28, Thomas Hug <thomas.hug@gmail.com> wrote:
>> Glad to hear :-)
>> I'd be surprised if @Stateless has any effect?
>>
>> On Tue, Dec 16, 2014 at 9:07 PM, Karl Kildén <karl.kilden@gmail.com>
>> wrote:
>>> For now I use just the interface and @Stateless not @AppScoped, should be
>>> okay? I really need to try clustering soon...
>>>
>>> Thanks for the data module I really like it - hope the issue can be
>>> resolved
>>>
>>> cheers
>>>
>>> On 16 December 2014 at 20:58, Thomas Hug <thomas.hug@gmail.com> wrote:
>>>> AFAIR it's not abstract repositories per se, it's the combination of an
>>>> abstract class extending an abstract class implementing an interface
>>> which
>>>> is somehow broken (took me ages to find that case and bounce the issue
>>> back
>>>> to PartialBeans). Which is what you get extending
>>> AbstractEntityRepository.
>>>> => You can skip AbstractEntityRepository, implement EntityRepository
>>>> directly and get the EM injected. Umm, haven't tried that actually but
>>>> stating it boldly here ;-)
>>>>
>>>> For the drawback, AppScope should definitely work fine (only some
>> people
>>>> react allergic to proxies ;-).
>>>>
>>>> On Tue, Dec 16, 2014 at 3:45 PM, Thomas Andraschko <
>>>> andraschko.thomas@gmail.com> wrote:
>>>>> Nothing, works perfectly fine.
>>>>> We have just a bug in our partial bean module if the repo is
>> abstract.
>>>>> Interfaces are working fine.
>>>>> Nevertheless, most of my repositories are abstract...
>>>>>
>>>>> 2014-12-16 15:41 GMT+01:00 Karl Kildén <karl.kilden@gmail.com>:
>>>>>> Whats the drawback for @ApplicationScoped eg.
>>>>>>
>>>>>> @Repository
>>>>>> @ApplicationScoped
>>>>>> public interface UserRepository extends EntityRepository<User,
>> Long>
>>> {
>>>>>> User findOptionalByUsernameEqual(String username);
>>>>>> }
>>>>>>
>>>>>> On 16 December 2014 at 14:23, Thomas Andraschko <
>>>>>> andraschko.thomas@gmail.com
>>>>>>> wrote:
>>>>>>>
>>>>>>> :D
>>>>>>>
>>>>>>> IMO it also doesn't make sense to serialize repositories!
>>>>>>>
>>>>>>> 2014-12-16 14:16 GMT+01:00 Thomas Hug <thomas.hug@gmail.com>:
>>>>>>>> Officially declaring this the "Thomas" thread ;-)
>>>>>>>>
>>>>>>>> Agree with Thomas that going for AppScope is probably the
>>> simplest
>>>>>>>> workaround for now. I remember some efforts for serialization
>> (as
>>>> OWB
>>>>>>>> complained for some cases) but overall it does not work well
>> when
>>>> you
>>>>>>> have
>>>>>>>> to inject EMs or use Instance<>. Fixing this properly
might
>>>> require a
>>>>>>> major
>>>>>>>> refactoring.
>>>>>>>>
>>>>>>>> On Tue, Dec 16, 2014 at 8:17 AM, Thomas Andraschko <
>>>>>>>> andraschko.thomas@gmail.com> wrote:
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> i would make your repositories AppScoped.
>>>>>>>>> Unfortunately AppScoped doesn't work for abstract
>> repositories
>>>> :/ I
>>>>>>> still
>>>>>>>>> have the same problem ->
>>>>>>>>> https://issues.apache.org/jira/browse/DELTASPIKE-647
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> 2014-12-15 23:47 GMT+01:00 Thomas Frühbeck <fruehbeck@aon.at
>>> :
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> we are integrating Data module of DS as vital part
of our
>>>>>> persistence
>>>>>>>>>> layer, but unfortunately Repositories are not Serializable,
>>> so
>>>>> that
>>>>>>>> SFSB
>>>>>>>>> or
>>>>>>>>>> SessionScoped beans with Dependent scoped dependencies
on
>>>>>>> Repositories
>>>>>>>>> will
>>>>>>>>>> fail in cluster configurations.
>>>>>>>>>>
>>>>>>>>>> Due to some recent overuse of scoped dependencies
we would
>>> like
>>>>> to
>>>>>>>>> refrain
>>>>>>>>>> from again starting to scope vital infrastructure.
>>>>>>>>>>
>>>>>>>>>> Can you give some advice, which way to solve this
problem?
>>>>>>>>>>
>>>>>>>>>> Many thanks for your dedication to DeltaSpike and
your
>> help,
>>>>>>>>>> Thomas
>>>>>>>>>>


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