[jboss-as7-dev] [OSGi WAB support] webbundle: URL handler

[Thomas Diesler]

Hi David,

here a quick summary of what I suggested today:

The first thing that sees the URL coming from BundleContext.install(...) 
is the Framework, which has a notion of pluggable URL handlers.
In AS7 the URL handler should be an integration plugin and a DUP at the 
same time. The DUP would do nothing as long as the plugin
is not activated (i.e. the framework is down). When the Framework 
activates the URL handler gets registered with the framework and the DUP 
becomes active.

The DUP would then need to provide OSGiMetaData with a 
Bunde-SymbolicName and Bundle-Classpath. The Bundle-Classpath should 
point to WEB-INF/classes and
the collection of stuff in WEB-INF/lib. For completeness it could 
generate Package-Import requirements on the javax.servlet.* APIs. The 
DUP should be placed after
the DUP that normally provides OSGiMetaData and should do nothing if the 
OSGiMetaData is already there.

Hope that helps, cheers
--thomas


On 11/21/2012 05:58 PM, David Bosschaert wrote:
> Hi all,
>
> As part of making the JBoss OSGi Web Application Support compliant with
> the spec I have started running it through the OSGi TCK.
> I noticed that the TCK depends heavily on the webbundle: URL protocol
> which is specified in section 128.4 of the specification - it is not an
> optional piece. So in order to support this we need to provide such a
> URL handler.
>
> As the webbundle: handler is never part of runtime operation (it only
> converts a WAR file into a WAB file on the fly) I was looking into
> possibly using existing implementations of the URL handler instead.
> However the ones that I found are quite heavy on the dependencies. The
> implementation in Aries depends on Blueprint being present and the one
> in Pax has about 10 other dependencies (including junit) - they drag in
> too much baggage IMHO.
>
> So I'm starting to come to the conclusion that we need to provide such
> an implementation as part of the OSGi webbundle support in AS7. The JIRA
> is https://issues.jboss.org/browse/AS7-6006
>
> Any other ideas?
>
> Cheers,
>
> David
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-- 
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Thomas Diesler
JBoss OSGi Lead
JBoss, a division of Red Hat
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