[cdi-dev] Bean Discovery Mode in SE

John D. Ament john.d.ament at gmail.com
Sun Mar 1 12:34:21 EST 2015

I would avoid adding yet another xml file.  It'll be a bit hard to decide
which XML files take precendence.

For those looking to comment, the CDI SE page of the spec can be seen here,
for comments:



On Sun, Mar 1, 2015 at 11:53 AM Romain Manni-Bucau <rmannibucau at gmail.com>

> well having a map as parameter is IMO mandatory at least for vendor
> features.
> about scanning we cant use it for EE but we could use a standard
> parameter. Issue we'll get here (EE) is we dont know when the container
> scans so not sure we can standardize it so easily, would maybe need some
> integration with other specs like a META-INF/scan.xml or something like
> that. I guess we can ignore EE short term to avoid another "by spec"
> solution - keeping vendor features for it in the mid term.
> Romain Manni-Bucau
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> 2015-03-01 17:49 GMT+01:00 John D. Ament <john.d.ament at gmail.com>:
>> So that's one of the benefits from my point of view of having that extra
>> initialize w/ map options.  We can start to define some standard parameters
>> to control SE mode for some SE specific issues that may pop up.
>> I'm just not sure how that'll apply yet, as ideally the issues should be
>> in both SE and EE.  I think your case is mostly an SE problem, but the
>> other issues I'm thinking of are EE as well.
>> - Additional scanning configuration on a global scale (package level and
>> classpath entry name [like you mentioned]).  Package level since the
>> beans.xml files all end up at the same level.
>> - How to specify additional Bean Defining Annotations (for
>> bean-discovery-mode=annotated)
>> - Disable extension loading/Explicitly list extensions to load.
>> There will probably be more options that come up as well.  Maybe to fix
>> the SE/EE discrepancies, we allow the definition of a bean that returns a
>> Map<String,Object> that can be loaded in either SE or EE, and instead of
>> the default being an empty map we read this via a service loader or
>> something.
>> John
>> On Sun, Mar 1, 2015 at 11:28 AM Romain Manni-Bucau <rmannibucau at gmail.com>
>> wrote:
>>> It is consistent so ok.
>>> Wonder if we can get some rule we could pass to the container to say
>>> "dont scan jackson*jar" - issue begin we have to suppose we run with a
>>> classpath we dont control. Or the opposite "scan myapp*jar".
>>> wdyt?
>>> Romain Manni-Bucau
>>> @rmannibucau <https://twitter.com/rmannibucau> |  Blog
>>> <http://rmannibucau.wordpress.com> | Github
>>> <https://github.com/rmannibucau> | LinkedIn
>>> <https://www.linkedin.com/in/rmannibucau> | Tomitriber
>>> <http://www.tomitribe.com>
>>> 2015-03-01 16:18 GMT+01:00 John D. Ament <john.d.ament at gmail.com>:
>>>> Yeah actually you're right.  For some reason I had in my head that
>>>> "all" was the default.  It's very clearly not.  Too early for some of this
>>>> :-)
>>>> So let me rephrase.  "annotated" will be the default bean discovery
>>>> mode if a classpath entry contains no META-INF/beans.xml, based on the
>>>> exact same rules used in EE.
>>>> Any concerns with that?
>>>> John
>>>> On Sun, Mar 1, 2015 at 10:10 AM Romain Manni-Bucau <
>>>> rmannibucau at gmail.com> wrote:
>>>>> For me it is 100% the same as ee where you have the same issues so
>>>>> keeping them aligned is better IMO. That said configuring globally the
>>>>> scanning would be nice.
>>>>> Le 1 mars 2015 15:54, "John D. Ament" <john.d.ament at gmail.com> a
>>>>> écrit :
>>>>>> All,
>>>>>> I'd like to propose in my doc changes for CDI-26 that if a classpath
>>>>>> entry does not contain a META-INF/beans.xml that it is treated as if it
>>>>>> were bean-discovery-mode=none, e.g. no beans will be scanned in that entry.
>>>>>> (BTW, I'm using classpath entry rather than archive in the document to
>>>>>> account for cases where someone does -cp
>>>>>> "./classes:./extra-classes:./lib/*" to define their classpath)
>>>>>> It's a bit different than how EE works, but I could imagine it
>>>>>> causing fewer headaches when running on SE classpaths.
>>>>>> Any thoughts/comments?
>>>>>> John
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