Okay, in that case gt-ysld would become an extension.
Thanks Jody. That should probably be documented somewhere.

On Thu, Jan 26, 2017 at 5:13 PM, Jody Garnett <jody.garn...@gmail.com>
wrote:

> plugins extend factory SPI somehow
> extensions add more stuff on top of the core geotools library
>
> --
> Jody Garnett
>
> On 26 January 2017 at 15:16, Ben Caradoc-Davies <b...@transient.nz> wrote:
>
>> +1. Thanks, Torben, that is quite thorough.
>>
>> Jody, do we have a policy for which supported modules are plugins and
>> which are extensions? I noticed that Torben used the term "plugin" and
>> realised that I do not know if we have rules. Is there a difference, or is
>> this just an historical oddity?
>>
>> Kind regards,
>> Ben.
>>
>> On 27/01/17 07:41, Torben Barsballe wrote:
>>
>>> The gt-ysld module is now ready to be considered for a supported module.
>>>
>>> I would like to request that this module be approved for inclusion as a
>>> supported plugin in the upcoming 16.2 / 17-beta releases.
>>> The module conforms to the requirements
>>> <http://docs.geotools.org/latest/developer/procedures/supported.html>
>>> for a
>>> supported module, as follows:
>>> Visibility / Module Status
>>>
>>>    - Gold Star Quality Assurance Check - Plugin QA Test - 4/5 stars
>>>
>>> Here is how a plugin (aka hooks into the geotools library) may earn a
>>> star:
>>> ⭐️ Passes IP check, basically has correct headers
>>>
>>>
>>>    - See REVIEW.md
>>>          <https://github.com/geotools/geotools/blob/master/modules/u
>>> nsupported/ysld/REVIEW.md>
>>>
>>> ⭐️ Releasable - has no non blocking bugs in jira
>>>
>>>
>>>    - GEOT-5622 <https://osgeo-org.atlassian.net/browse/GEOT-5622> is the
>>>          only open bug, not blocking.
>>>
>>> ⭐️ Used in anger - Used by GeoServer or uDig or Geomajas (ie some kind of
>>> large real world datasets)
>>>
>>>
>>>    - Used by the gs-ysld extension in geoserver
>>>
>>>   Optimised - has been tuned to meet hard performance requirements
>>> (example
>>> shapefile)
>>>
>>>
>>>    - Not really, but only place where this is really important is
>>>          rendering, and at this point we are using the gt-api
>>> StyledLayerDescriptor
>>>          objects
>>>
>>> ⭐️ Supported - user docs, module maintainer watches user list, answers
>>> email etc.. (example referencing)
>>>
>>>
>>>    - User documentation here
>>>          <http://docs.geotools.org/latest/userguide/unsupported/ysld
>>> .html>.
>>>          - Module maintainers: Justin Deolivera, Kevin Smith
>>>
>>> Intellectual Property Check
>>>
>>>    - Passes, See https://github.com/geotools/ge
>>> otools/blob/master/modules
>>>    /unsupported/ysld/REVIEW.md
>>>
>>> Follow the Developers Guide
>>>
>>>    - Analysis here: https://gist.github.com/mattkr
>>> usz/b010eb29aa784025a639
>>>    c473b768801e
>>>    - PR here: https://github.com/geotools/geotools/pull/1440 (merged)
>>>
>>> Test Coverage and Maven Profiles
>>>
>>>    - Test coverage exceeds the required 40%: Line coverage is 85%, Branch
>>>    coverage is 73%
>>>
>>> User Documentation
>>>
>>>    - Has user documentation: http://docs.geotools.org/lates
>>> t/userguide/uns
>>>
>>>    upported/ysld.html
>>>
>>>
>>>
>>> If the GeoTools PMC is happy with the module, I will put together a PR
>>> moving it from unsupported to plugin.
>>>
>>> Thanks,
>>>
>>> Torben
>>>
>>> On Wed, Jan 25, 2017 at 3:24 PM, Torben Barsballe <
>>> tbarsba...@boundlessgeo.com> wrote:
>>>
>>> Thanks for the feedback. Class javadocs have been updated in the PR.
>>>>
>>>> Torben
>>>>
>>>> On Wed, Jan 25, 2017 at 9:56 AM, Jody Garnett <jody.garn...@gmail.com>
>>>> wrote:
>>>>
>>>> Thanks, formatting changes look good. I looked for the null returns -
>>>>> and
>>>>> the "return null" statements I found were not especially documented.
>>>>>
>>>>> General feedback is we could take one run at class javadocs (usual
>>>>> Class/Responsibility/Collaboration info) and we should be good.
>>>>>
>>>>> --
>>>>> Jody Garnett
>>>>>
>>>>> On 25 January 2017 at 09:26, Torben Barsballe <
>>>>> tbarsba...@boundlessgeo.com> wrote:
>>>>>
>>>>> Based on Matt's analysis, we have put together a pull request fixing up
>>>>>> the outstanding issues in gt-ysld bringing it up to compliance with
>>>>>> the
>>>>>> developers guide: https://github.com/geotools/geotools/pull/1440
>>>>>>
>>>>>> Null returns are documented, and are used sparingly.
>>>>>>
>>>>>> Torben
>>>>>>
>>>>>> On Tue, Jan 24, 2017 at 9:56 PM, Jody Garnett <jody.garn...@gmail.com
>>>>>> >
>>>>>> wrote:
>>>>>>
>>>>>> I am not as keen as Martin was, I expect that Optionals will take the
>>>>>>> place of the idea of null objects long term.
>>>>>>>
>>>>>>> What I am keen on is making our developer guide not suck; so if we
>>>>>>> are
>>>>>>> not being strict about null we should relax the guide (citing
>>>>>>> returning a
>>>>>>> null collection). I am kind of okay with returning null if it is
>>>>>>> clearly
>>>>>>> documented in the javadocs (since those show up as a tooltip when
>>>>>>> developers are working).
>>>>>>>
>>>>>>> --
>>>>>>> Jody Garnett
>>>>>>>
>>>>>>> On 24 January 2017 at 10:11, Andrea Aime <
>>>>>>> andrea.a...@geo-solutions.it>
>>>>>>> wrote:
>>>>>>>
>>>>>>> On Tue, Jan 24, 2017 at 6:57 PM, Matt Kruszewski <
>>>>>>>> mkruszew...@boundlessgeo.com> wrote:
>>>>>>>>
>>>>>>>> Hello everyone,
>>>>>>>>>
>>>>>>>>> I've started applying the developer guide standards to the gt-ysld
>>>>>>>>> module, keeping notes in this gist:
>>>>>>>>>
>>>>>>>>> https://gist.github.com/mattkrusz/b010eb29aa784025a639c473b768801e
>>>>>>>>>
>>>>>>>>>
>>>>>>>> I don't agree on the "do not return null" applied in a blanket way
>>>>>>>> (as
>>>>>>>> a strong requirement, while I see all other bits you suggest as
>>>>>>>> strong
>>>>>>>> requirements).
>>>>>>>> The library is just not built that way, it returns nulls in so many
>>>>>>>> places it's impossible to count.
>>>>>>>> I also don't see this "rule" being cited anywhere else, although I
>>>>>>>> know Jody is keen on it.
>>>>>>>>
>>>>>>>> Yes, in some cases returning null is just bad (e.g., returning a
>>>>>>>> null
>>>>>>>> collection when an empty one would do),
>>>>>>>> but for the rest I'm for a case by case evaluation.
>>>>>>>> Or are you suggesting we should be returning Optional everywhere?
>>>>>>>>
>>>>>>>> Cheers
>>>>>>>> Andrea
>>>>>>>>
>>>>>>>> --
>>>>>>>> ==
>>>>>>>> GeoServer Professional Services from the experts! Visit
>>>>>>>> http://goo.gl/it488V for more information.
>>>>>>>> ==
>>>>>>>>
>>>>>>>> Ing. Andrea Aime
>>>>>>>> @geowolf
>>>>>>>> Technical Lead
>>>>>>>>
>>>>>>>> GeoSolutions S.A.S.
>>>>>>>> Via di Montramito 3/A
>>>>>>>> 55054  Massarosa (LU)
>>>>>>>> phone: +39 0584 962313 <+39%200584%20962313>
>>>>>>>> fax: +39 0584 1660272 <+39%200584%20166%200272>
>>>>>>>> mob: +39 339 8844549 <+39%20339%20884%204549>
>>>>>>>>
>>>>>>>> http://www.geo-solutions.it
>>>>>>>> http://twitter.com/geosolutions_it
>>>>>>>>
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>> --
>> Ben Caradoc-Davies <b...@transient.nz>
>> Director
>> Transient Software Limited <http://transient.nz/>
>> New Zealand
>>
>
>
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