[rules-users] OSGI, classloading, and imports in KnowledgeBuilder

[Simon Thum]

Mark Proctor wrote:
> We'd really like to improve out OSGi friendlyness. From getting Drools
> to work perfectly as an OSGi service, to getting our build system to
> publish all the necessary bundles. But we need people in the commnity to
> help us, you know where to find us if you want to help out, as we have
> so much other core stuff to do :)
> http://wwws.jboss.org/drools/irc.html
Good to know; I've got some bits up my sleeves.

FTR, the chained classloader approach forked fine for me, though I can't
recommend the one in the osgi blog article (it doesn't maintain order).
It allow drools usage without overgrown imports. You'll have to knock up
some trivial chained classloader though, but if you're in osgi this
seems to have utility anyway.

> 
> Mark
> Simon Thum wrote:
>> Lasse.Wallentin at apcc.com wrote:
>>  
>>> Ok, I finally got it running. I had missed an import in the excel
>>> sheet so I had a dependency on another bundle.
>>>     
>> Cool!
>>
>>  
>>> All this debugging has made me understand (and appreciate) the
>>> solution sketched earlier by Faron Dutton more clearly. However it
>>> still seems a bit involved when just a few decisiontables is needed -
>>> don't you think?
>>>     
>> I think that under OSGi in gereral, the classloader becomes much more
>> important. Luckily drools is prepared for that, but it still pushes OSGi
>> a fair bit - with us witnessing the fallout.
>>
>> Basically you need a classloader which can access you classes _and_ all
>> drools internals. Probably we could combine them somehow. Thought,
>> googled :)
>> http://www.osgi.org/blog/2008/08/classy-solutions-to-tricky-proxies.html
>>
>> I'm not too content with my setup as well, maybe you can sketch yours as
>> it's running now? I'm gonna the try above solution, maybe we can
>> establish some best practise.
>>
>> Cheers,
>>
>> Simon
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>>
>>   
> 
> 
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