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From "Stefan Guggisberg" <stefan.guggisb...@day.com>
Subject Re: OSGi 1.5
Date Fri, 30 May 2008 09:02:43 GMT
On Fri, May 30, 2008 at 7:35 AM, Felix Meschberger <fmeschbe@gmail.com> wrote:
> Hi,
>
> Am Sonntag, den 25.05.2008, 18:30 +1000 schrieb Bradley Beddoes:
>> Hi All,
>> I have been reading over a few threads and looking at this issue:
>> https://issues.apache.org/jira/browse/JCR-1342
>>
>> Have checked out the nighly hudson builds and for the components listed
>> in this issue OSGi bundle data is being put into the manifest.
>>
>> My question is why is jackrabbit-core and other components not included
>> in this? I would have thought that core in-particular would have been
>> useful as a bundle?.
>
> I 200% agree with you - working on Sling embedding Jackrabbit into the
> OSGi framework. This is why I modified two libraries to include the OSGi
> manifest headers.
>
> Now, the problem with Jackrabbit-Core is the rich and theoretically open
> dependency set (by way of the way it is configured today). You could of
> course just add the bundle manifest headers to the build. The resulting
> bundle has (virtually) tons of imports. This means you have to provide
> bundles in your OSGi framework to satisfy these dependencies.
>
> In Apache Sling I went the other way around and made the bundle
> embedding the Jackrabbit repository (jcr/jackrabbit-server) as
> self-contained as possible and useful by including many of the
> dependency libraries in the bundle. This makes integration a lot easier.
> But then, this can of course not be done in the standard build of the
> jackrabbit-core library.
>
> Looking at these two options, I am not sure, which is the better one --
> and there is another issue coming to my mind: Extensibility and
> configuration of an embedded Jackrabbit Repository: When deploying into
> an OSGi framework you might want to extend Jackrabbit using OSGi means
> such as adding (and updating) persistence managers on-the-fly and of
> course you might want to use OSGi Configuration Admin to configure
> Jackrabbit.
>
> All this is not possible with the current jackrabbit-core. I would love
> to see these extensions come into Jackrabbit and AFAIK there are
> thoughts about making jackrabbit-core more OSGi friendly ... but we are
> all somewhat time constrained and the main focuse currently is to
> implement jackrabbit-core as the JSR-283 RI.

and not everybody shares your OSGi enthusiasm WRT jackrabbit-core,
i for one am rather sceptic ;)

cheers
stefan

>
> If you want to use jackrabbit in an OSGi framework I suggest you look at
> the work we've done in Sling (maybe the respective work more belongs to
> Jackrabbit than to Sling ...) or what is available in the Jackrabbit
> Spring integration.
>
> Hope this helps.
>
> Regards
> Felix
>
>

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