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From "Alan D. Cabrera" <>
Subject Re: Geronimo specs jars in OSGi
Date Thu, 17 Apr 2008 14:10:44 GMT

On Apr 16, 2008, at 8:20 AM, Guillaume Nodet wrote:

> In the past months, I've been working on making the specs jars from  
> Geronimo working in an OSGi environment.
> All these jars have been published and work great :-)
> However, lots of these spec jars define factories (stax, saaj for  
> example) that use the META-INF/services/ discovery mechanism to find  
> an implementation of the spec and load it.  This mechanism does not  
> fit well in OSGi (really, it does not), mainly because usually, the  
> classloader containing the spec jar will not contain the  
> implementation.
> I'd like to work on these spec jars so that they will contain an  
> OSGi BundleActivator that would change the behavior of these  
> factories when deployed in an OSGi environment (without changing the  
> behavior in other case).  The idea is that the activator would scan  
> OSGi bundles when they are started to find META-INF/services and  
> populate a map that would be used by the factory when creating an  
> object before using the standard mechanism.
> The only real difference compared to what we currently have would be  
> the addition of a package named org.apache.geronimo.specs.stax (for  
> example) that would contain the needed classes (i suppose two  
> classes), and the modification of the factories to delegate to one  
> of these class before using the standard behavior (the class would  
> do nothing if not deployed in an OSGi environment).
> Has anyone any objection with such an enhancement in the specs jar ?

I would prefer to have a virgin spec jar wrapped inside an OSGi  
bundle. Here the virgin factories would be overshadowed by the OSGi  
specific factories.

I feel strongly about this but am willing to discuss it.


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