[wildfly-dev] Where to register CDI Context for JTA 1.2

[Stuart Douglas]

When you add the org.jboss.jts dependency are you setting the 'services' 
flag to true?

Weld relies on its environment to pass in information about portable 
extensions, which is where that DUP comes in. As you can see it just 
loads it from the current classloader, with some extra code to make sure 
that nothing is duplicated, as the same PE will often be available to 
every sub-deployment.

Stuart

Paul Robinson wrote:
> Stuart,
>
> Let me check if I understand you correctly...
>
> I have a module "org.jboss.jts" that applications using my portable
> extension depend upon.
>
> I've put the PE file in the module jar. See here:
>
> unzip -l
> modules/system/layers/base/org/jboss/jts/main/narayana-jts-jacorb-5.0.0.M3-SNAPSHOT.jar
> | grep META-INF | grep -v maven
> 0 05-24-13 15:01 META-INF/
> 656 05-24-13 15:01 META-INF/MANIFEST.MF
> 49 05-24-13 15:24 META-INF/services/javax.enterprise.inject.spi.Extension
> 0 05-24-13 16:02 META-INF/beans.xml
>
> The contents of META-INF/services/javax.enterprise.inject.spi.Extension,
> contains just "com.arjuna.ats.jta.cdi.TransactionScopedExtension".
>
> I've put breakpoints on the methods in
> "com.arjuna.ats.jta.cdi.TransactionScopedExtension" and they are never
> invoked.
>
> I also wonder why we still need CDIExtensionProcessors like this:
> https://github.com/wildfly/wildfly/pull/4535/files#diff-7, if "you
> should just need to add the module with the META-INF/services entry as a
> dependency".
>
> Are you able to correct my understanding?
>
> Much appreciated,
>
> Paul.
>
>
> On 22 May 2013, at 12:34, Stuart Douglas <sdouglas at redhat.com
> <mailto:sdouglas at redhat.com>> wrote:
>
>> No, you should just need to add the module with the META-INF/services
>> entry as a dependency. If it is a Weld deployment then it will pick it up.
>>
>> Stuart
>>
>> Paul Robinson wrote:
>>> Stuart,
>>>
>>> That's great, thanks a lot. I'll keep an eye on the PR.
>>>
>>> Also, won't I still need to use the WeldDeploymentMarker?
>>>
>>> Paul.
>>>
>>> On 22 May 2013, at 01:38, Stuart Douglas <stuart.w.douglas at gmail.com
>>> <mailto:stuart.w.douglas at gmail.com>
>>> <mailto:stuart.w.douglas at gmail.com>> wrote:
>>>
>>>> I have been meaning to change the way these are registered for some
>>>> time:
>>>>
>>>> https://github.com/wildfly/wildfly/pull/4535
>>>>
>>>> Now it should just be a matter of adding a dependency with a services
>>>> import on the relevant module.
>>>>
>>>> Stuart
>>>>
>>>> Paul Robinson wrote:
>>>>> Stuart,
>>>>>
>>>>> The problem with this approach is that I need to introduce a dependency
>>>>> on org.jboss.as:jboss-as-weld, which depends on
>>>>> org.jboss.as:jboss-as-transactions. This introduces a cyclic
>>>>> dependency.
>>>>> org.jboss.as:jboss-as-weld is needed for the WeldDeploymentMarker
>>>>> and to
>>>>> use WeldAttachments.PORTABLE_EXTENSIONS.
>>>>>
>>>>>> You can do this for every deployment, if beans.xml is not present it
>>>>>> won't do anything
>>>>>
>>>>> I assume this is done by the three tests at the top of the deploy
>>>>> method? Therefore, I would need to use WeldDeploymentMarker.
>>>>>
>>>>>> you basically just need to attach it under
>>>>>> org.jboss.as.weld.deployment.WeldAttachments#PORTABLE_EXTENSIONS for
>>>>>> the top level deployment.
>>>>> Again, I can't do this without access to
>>>>> WeldAttachments.PORTABLE_EXTENSIONS.
>>>>>
>>>>> To break this cycle, I think I would need to create a new maven module
>>>>> and subsytem called, for example, transactions-cdi. This seems a bit
>>>>> over-kill. Is there an alternative you can think of?
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Paul.
>>>>>
>>>>>
>>>>> On 14 May 2013, at 10:15, Stuart Douglas <sdouglas at redhat.com
>>>>> <mailto:sdouglas at redhat.com>> wrote:
>>>>>
>>>>>> Registering it in a DUP in the transactions subsystem is fine.
>>>>>>
>>>>>> Have a look in
>>>>>> org.jboss.as.weld.deployment.processors.WeldPortableExtensionProcessor#loadAttachments
>>>>>> for an example of what you need to do, you basically just need to
>>>>>> attach it under
>>>>>> org.jboss.as.weld.deployment.WeldAttachments#PORTABLE_EXTENSIONS for
>>>>>> the top level deployment.
>>>>>>
>>>>>> You can do this for every deployment, if beans.xml is not present it
>>>>>> won't do anything.
>>>>>>
>>>>>> Stuart
>>>>>>
>>>>>> Paul Robinson wrote:
>>>>>>> Stuart (wildfly-dev in CC too)
>>>>>>>
>>>>>>> I'm implementing JTA 1.2, and part of it is to develop a new CDI
>>>>>>> context. I'm currently registering that via an Extension in the
>>>>>>> javax.enterprise.inject.spi.Extension file. The problem with this is
>>>>>>> that this is a burden on the application developer. Alternatively, I
>>>>>>> could register it in a DUP in the transactions subsytem. I'd probably
>>>>>>> have to register it for every deployment, as I don't think I can
>>>>>>> detect
>>>>>>> if it's needed.
>>>>>>>
>>>>>>> @pmuir said that you would probably know what I should do.
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Paul.
>>>>>>> --
>>>>>>> Paul Robinson
>>>>>>> Web Service Transactions Lead
>>>>>>> paul.robinson at redhat.com <mailto:paul.robinson at redhat.com>
>>>>>>> <mailto:paul.robinson at redhat.com>
>>>>>>>
>>>>>>> JBoss, a Division of Red Hat
>>>>>>> Registered in England and Wales under Company Registration No.
>>>>>>> 03798903
>>>>>>> Directors: Michael Cunningham (USA), Brendan Lane (Ireland), Matt
>>>>>>> Parson
>>>>>>> (USA), Charlie Peters (USA)
>>>>>>>
>>>>>
>>>>> --
>>>>> Paul Robinson
>>>>> Web Service Transactions Lead
>>>>> paul.robinson at redhat.com <mailto:paul.robinson at redhat.com>
>>>>>
>>>>> JBoss, a Division of Red Hat
>>>>> Registered in England and Wales under Company Registration No. 03798903
>>>>> Directors: Michael Cunningham (USA), Brendan Lane (Ireland), Matt
>>>>> Parson
>>>>> (USA), Charlie Peters (USA)
>>>>>
>>>>> _______________________________________________
>>>>> wildfly-dev mailing list
>>>>> wildfly-dev at lists.jboss.org
>>>>> https://lists.jboss.org/mailman/listinfo/wildfly-dev
>>>
>>> --
>>> Paul Robinson
>>> Web Service Transactions Lead
>>> paul.robinson at redhat.com <mailto:paul.robinson at redhat.com>
>>> <mailto:paul.robinson at redhat.com>
>>>
>>> JBoss, a Division of Red Hat
>>> Registered in England and Wales under Company Registration No. 03798903
>>> Directors: Michael Cunningham (USA), Brendan Lane (Ireland), Matt Parson
>>> (USA), Charlie Peters (USA)
>>>
>
> --
> Paul Robinson
> Web Service Transactions Lead
> paul.robinson at redhat.com <mailto:paul.robinson at redhat.com>
>
> JBoss, a Division of Red Hat
> Registered in England and Wales under Company Registration No. 03798903
> Directors: Michael Cunningham (USA), Brendan Lane (Ireland), Matt Parson
> (USA), Charlie Peters (USA)
>