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From Jeremias Maerki <...@jeremias-maerki.ch>
Subject Re: Status of OSGI Support
Date Wed, 29 May 2013 06:53:51 GMT
Hi Charles

I've made Batik and FOP OSGi-compatible in a private fork. Due to the
minimum requirement of Java 1.5, the SPI Fly approach through
java.util.Services is not possible. But I've created a small abstraction
that partly leverages SPI Fly but works with Java 1.5. I've planned to
submit [1] it to the Aries project but the initial submission showed a
flaw that I've later fixed. But since then I haven't resubmitted the
fixed version. I've got Batik and FOP running in production in an OSGi
environment with the ability to add and remove plug-ins at runtime. The
big problem is probably that I've done the necessary adjustments in
private forks. In the meantime, a lot has been changed including
backwards-incompatible changes of public APIs (mostly FOP) which I've
given up contesting. If you've got the time and energy to pursue it, I
can submit the fixed "SPI Catch" proposal and give you the changes
necessary for XGC and Batik, so you can migrate them to the current
trunks.

I'm not sure but I think the ServiceMix/Camel people have some kind of
OSGi-fied FOP version running for them. Probably even Batik:
http://svn.apache.org/repos/asf/servicemix/smx4/bundles/trunk/batik-1.7/
But I don't know what they've done and how well it works.

[1] https://issues.apache.org/jira/browse/ARIES-938

HTH
Jeremias Maerki


On 28.05.2013 17:58:42 Charles Moulliard wrote:
> Hi Chris,
> 
> Thx for the update. I will have a look perhaps next week
> 
> Regards,
> 
> Charles
> 
> ---------- Forwarded message ----------
> From: Chris Bowditch <bowditch_chris@hotmail.com>
> Date: Tue, May 28, 2013 at 5:51 PM
> Subject: Re: Status of OSGI Support
> To: batik-dev@xmlgraphics.apache.org
> 
> 
> Hi Charles,
> 
> 
> On 28/05/2013 05:58, Charles Moulliard wrote:
> 
> > Hi,
> >
> > We are currently working on deploying Activiti project (using batik) on
> > Apache Karaf () which is a multi-technology OSGI container (CXF, Camel,
> > ActiveMQ, Spring, Java, BPM, ...) and are faced to this issue :
> >
> > org.apache.batik.transcoder.**TranscoderException: null
> > Enclosed Exception:
> > Could not write PNG file because no WriteAdapter is availble
> > at org.apache.batik.transcoder.**image.ImageTranscoder.**
> > transcode(ImageTranscoder.**java:132)
> > at org.apache.batik.transcoder.**XMLAbstractTranscoder.**transcode(**
> > XMLAbstractTranscoder.java:**142)
> > at org.apache.batik.transcoder.**SVGAbstractTranscoder.**transcode(**
> > SVGAbstractTranscoder.java:**156)
> > at org.activiti.editor.rest.**model.ModelSaveRestResource.**saveModel(**
> > ModelSaveRestResource.java:78)
> > at sun.reflect.**NativeMethodAccessorImpl.**invoke0(Native
> > Method)[:1.6.0_45]
> >
> >
> > This problem is due to to the fact (I think so) that ServiceProvider which
> > is a Java EE feature does not work by default on OSGI container excepted if
> > we use Aries SpiFly with Batik. As this approach was described here :
> >
> > http://wiki.apache.org/**xmlgraphics/OSGiSupport<http://wiki.apache.org/xmlgraphics/OSGiSupport>
> >
> > Can somebody provides me a status of that development ?
> >
> 
> I'm not aware of any development in this area. I think you are only the
> second person who mentioned a need for it on the mailing lists, but I could
> be wrong. Of course, if you have time to develop a patch for it, your
> submission would be welcomed :-)
> 
> May I suggest taking this discussion to general@xmlgraphics.apache.org**,
> since this issue affects fop, batik and commons in equal measure.
> 
> Thanks,
> 
> Chris
> 
> 
> 
> > Regards,
> >
> > --
> > Charles Moulliard
> > Apache Committer / Sr. Enterprise Architect (RedHat)
> > Twitter : @cmoulliard | Blog : http://cmoulliard.blogspot.com
> >
> >
> 
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> 
> 
> 
> -- 
> Charles Moulliard
> Apache Committer / Sr. Enterprise Architect (RedHat)
> Twitter : @cmoulliard | Blog : http://cmoulliard.blogspot.com


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