Putting my Metro hat on here,
Really *the* motivation for Metro to deliver things as one big blob is
so that we can release one set of binaries as stand-alone and then
deliver the same bits to v2 and v3.
Metro needs to keep delivering into v2 and v3 for some time to come, and
we do stand-alone releases for foreseeable future. If we can deliver
our bits in the exact same fashion into two versions of GF, that would
considerably simplify our build qualification and testing effort. And
this is one area where we are really stretched thin.
This also has an added benefits to users, as they can take the
stand-alone bits and upgrade GF by simply copying the jars. (Although
this is a secondary issue for v3, assuming it has its own update channel
to deliver new bits.)
You are right that there's a possibility that EE6 defines profiles that
only require a certain portion of Metro but not the others, but so far
that hasn't happened yet, and I thought it won't be too late to revisit
the packaging when/if that happens.
There's also a small issue that nucleus already depends on a StAX
implementation, which is today delivered as a part of Metro, but we felt
that that was small enough duplication and the benefit of single bits
delivery outweighs the problem.
So all in all, what I'm suggesting is to start the Metro integration
into v3 according to Bhakti's suggestion, with the understanding that we
should be open to the possibility of revisiting this.
Bhakti Mehta wrote:
> Jerome,
> Please read inline
> Jerome Dochez wrote:
>> my initial feeling is that it is too coarse grained.
> I tend to agree but if different profiles start plugging in their own
> versions of the subparts wouldnt that be a nightmare to debug? Hence I
> brought up this question here should metro be a module or should there
> be dependencies for individual technologies in metro?
>
> Regards,
> Bhakti
>>
>> For instance, for people who don't care about java ee compatibility
>> and would want to only support say JAXB+JAXWS (which I assume would be
>> doable), how would that work ?
>>
>> also in Java EE 6, different profiles may require different subpart of
>> the metro stack, wouldn't that make things harder to decouple...
>>
>> Jerome
>>
>> On Feb 28, 2008, at 3:18 PM, Bhakti Mehta wrote:
>>
>>> Hi,
>>> I wanted to check if there are individual modules in v3 depending on
>>> various technologies from the metro stack like jaxb, jaxws, sjsxp,
>>> stax-ex,saaj?
>>>
>>> Since all these technologies are bundled in
>>> webservices-rt/webservices-tools.jar and the 1.1.2-SNAPSHOT version
>>> of metro is already on maven repository
>>> Imaybe we should just refer to webservices-rt,webservices-api and
>>> webservices-tools in our dependencies
>>>
>>> The only case maybe where Kohsuke suggested sjsxp (people just
>>> wanting to use the parser may not want to get the whole metro stack)
>>> In that case we can let the dependency for sjsxp remain in the poms
>>> but for other technologies I can just update the poms to use metro.
>>>
>>> Do other modules see issues with that?
>>>
>>> Thanks,
>>> Bhakti
--
Kohsuke Kawaguchi
Sun Microsystems kohsuke.kawaguchi_at_sun.com