Project proposal: Penrose

[Tim Ellison]

On 6 January 2012 20:18, Alan Bateman <Alan.Bateman at oracle.com> wrote:
> On 06/01/2012 17:58, Tim Ellison wrote:
>>
>> :
>> No, I don't expect to import or implement OSGi in the Penrose project,
>> rather we will work on a clone of Jigsaw to achieve the OSGi interop
>> and merge those changes back to Jigsaw once the objectives have been
>> achieved.
>>
>> Furthermore we will work with OSGi implementers to advise, guide, and
>> put requirements on the Penrose changes --  and hopefully keep pace
>> with changes on the OSGi side too to ensure we have the full
>> end-to-end story working.
>>
>> Penrose provides the OpenJDK side of the story, and a forum for
>> community discussion.
>>
> I think I understand the objectives but I don't think I understand the
> approach, or rather I don't see how the proposed project can explore
> interoperability without experimenting with changes to some OSGi
> implementation. As an initial step I would expect some changes so that the
> OSGi implementation will install and run in module mode. I would also expect
> changes so that the OSGi kernel can resolve modules that are installed in a
> Jigsaw module library. If changes are required then would these be in
> another project? I've no doubt that this effort will require changes to
> Jigsaw too, in particular the API, but not clear me that the goals are
> achievable with only changes to Jigsaw.

I agree Alan, but as you say, there is no OSGi implementation at
OpenJDK we can use to conduct the whole story here; so the proposal is
to prototype the Jigsaw changes required, and provide a forum for
collaboration with the broader community including OSGi projects.

I believe we can attract OSGi implementers to participate and do 'the
other side' of the prototyping elsewhere - but we need to have the
Jigsaw side too and that is the only part I can ask OpenJDK members to
approve.

If you have some other ideas about how to achieve the requirement it
would be good to hear them.

Regards,
Tim