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From Lars-Fredrik Smedberg <itsme...@gmail.com>
Subject Re: CDI spec question on interceptors, alternatives and priority
Date Wed, 15 Jun 2016 13:27:31 GMT
I guess they could for alternative example with priority just use whatever
numeric value instead of referig to Intercetors.Priority.... I also not
want an Alternative.Priority :)

On Wed, Jun 15, 2016 at 3:24 PM, Romain Manni-Bucau <rmannibucau@gmail.com>
wrote:

> that's the only one in EE "IoC" part AFAIK and not sure having a
> Alternative.Priority with the same constant but reversed would help more.
> +0 for this one ;).
>
>
> Romain Manni-Bucau
> @rmannibucau <https://twitter.com/rmannibucau> |  Blog
> <https://blog-rmannibucau.rhcloud.com> | Old Wordpress Blog
> <http://rmannibucau.wordpress.com> | Github
> <https://github.com/rmannibucau> | LinkedIn
> <https://www.linkedin.com/in/rmannibucau> | Tomitriber
> <http://www.tomitribe.com> | JavaEE Factory
> <https://javaeefactory-rmannibucau.rhcloud.com>
>
> 2016-06-15 15:19 GMT+02:00 Lars-Fredrik Smedberg <itsmeden@gmail.com>:
>
>> Hi
>>
>> Thanks for the answer... will probably do the same (define my own
>> priority constants...)... maybe they should extends the examples a bit and
>> not include references to Interceptors.Priority for alternatives?
>>
>> On Wed, Jun 15, 2016 at 3:03 PM, Romain Manni-Bucau <
>> rmannibucau@gmail.com> wrote:
>>
>>> Hi
>>>
>>> got the same when working on TCK, some spec redefine priorities in their
>>> own "constant class" like JAX-RS. As a dev I also did it quite a few with
>>> my own ordering (using interceptor as reference but using my own semantic).
>>> This is still an option for you.
>>>
>>>
>>> Romain Manni-Bucau
>>> @rmannibucau <https://twitter.com/rmannibucau> |  Blog
>>> <https://blog-rmannibucau.rhcloud.com> | Old Wordpress Blog
>>> <http://rmannibucau.wordpress.com> | Github
>>> <https://github.com/rmannibucau> | LinkedIn
>>> <https://www.linkedin.com/in/rmannibucau> | Tomitriber
>>> <http://www.tomitribe.com> | JavaEE Factory
>>> <https://javaeefactory-rmannibucau.rhcloud.com>
>>>
>>> 2016-06-15 15:00 GMT+02:00 Lars-Fredrik Smedberg <itsmeden@gmail.com>:
>>>
>>>> Hi!
>>>>
>>>> Was not sure what mailing list to send this to but I guess some of you
>>>> could help me out.
>>>>
>>>> We are moving to JEE 7 and we are annotating our interceptors with
>>>> @Priority(...) to not have to include them in all beans.xml in all archives
>>>> where they should be used.
>>>> The value for the @Priority annotation are based upon the constants
>>>> defined in Interceptor.Priority... which JavaDoc says "Interceptors with
>>>> smaller priority values are called first."... so far so good...
>>>>
>>>> Then I also want to be able to place alternatives in separate
>>>> modules/jars that we will use in some test environments. This also works
>>>> good using @Alternative and @Priority... I understand
>>>> that the alternative is activated by using the @Priority annotation. In
>>>> section 5.2.2 of the CDI 1.2 spec (e.g.
>>>> http://docs.jboss.org/cdi/spec/1.2/cdi-spec-1.2.pdf) I read the
>>>> following:
>>>>
>>>> "...all the beans left are alternatives with a priority, or producer
>>>> methods or fields of beans that
>>>> are alternatives with a priority, then the container will determine the
>>>> highest priority value, and
>>>> eliminate all beans, except for alternatives with the highest
>>>> priority..."
>>>>
>>>> I have tested this and I'm fine with that the higher priority
>>>> alternative is choosen. However in same spec in section 4.3 they have the
>>>> following example:
>>>>
>>>> "@Alternative @Priority(APPLICATION+100)
>>>> public class MockAsynchronousService extends AsynchronousService {"
>>>>
>>>> Similar example can be found at e.g.:
>>>> https://docs.oracle.com/javaee/7/tutorial/cdi-adv002.htm
>>>>
>>>> To me its confusing to use a priority value based on
>>>> Interceptors.Priority since the semantics of the Priority value is the
>>>> opposite for interceptors and alternatives?
>>>>
>>>> Does the examples for alternatives only confuse me or did I miss
>>>> someting?
>>>>
>>>> Best regards
>>>> Lars-Fredrik Smedberg
>>>>
>>>> --
>>>> Med vänlig hälsning / Best regards
>>>>
>>>> Lars-Fredrik Smedberg
>>>>
>>>> STATEMENT OF CONFIDENTIALITY:
>>>> The information contained in this electronic message and any
>>>> attachments to this message are intended for the exclusive use of the
>>>> address(es) and may contain confidential or privileged information. If
>>>> you are not the intended recipient, please notify Lars-Fredrik Smedberg
>>>> immediately at itsmeden@gmail.com, and destroy all copies of this
>>>> message and any attachments.
>>>>
>>>
>>>
>>
>>
>> --
>> Med vänlig hälsning / Best regards
>>
>> Lars-Fredrik Smedberg
>>
>> STATEMENT OF CONFIDENTIALITY:
>> The information contained in this electronic message and any
>> attachments to this message are intended for the exclusive use of the
>> address(es) and may contain confidential or privileged information. If
>> you are not the intended recipient, please notify Lars-Fredrik Smedberg
>> immediately at itsmeden@gmail.com, and destroy all copies of this
>> message and any attachments.
>>
>
>


-- 
Med vänlig hälsning / Best regards

Lars-Fredrik Smedberg

STATEMENT OF CONFIDENTIALITY:
The information contained in this electronic message and any
attachments to this message are intended for the exclusive use of the
address(es) and may contain confidential or privileged information. If
you are not the intended recipient, please notify Lars-Fredrik Smedberg
immediately at itsmeden@gmail.com, and destroy all copies of this
message and any attachments.

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