| Classloading issue for overwritten classes [message #633779] |
Tue, 19 October 2010 12:24  |
 Philipp Leusmann
Messages: 36
Registered: July 2009 |
Member |
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Hi,
we are experiencing classloading issues when using JaxWS Webservices
with JBoss.
For whatever reason, JBoss chose to overwrite several classes which are
already contained in the JDK. for example they reimplemented the whole
javax.xml.ws package.
In my special case I receive a ClassCastException, when trying to cast a
org.jboss.ws.core.jaxws.client.ClientImpl to
javax.xml.ws.BindingProvider. Of cource ClientImpl implements the
BindingProvider.
So I suspect the VM is trying to cast the ClientImpl to the
JDK-implementation of BindingProvider.
So, is there any way to convince Equinox to always load classes from the
jboss-jar instead of the jar in the JDK?
Will I need to implement a custom ClassLoader to achieve this?
One more thing i'd like to mention. The casting worked previously, but I
needed to move the class perfoming the cast to another bundle.
Previously it was in Bundle B, which is a dependency for Bundle A, and
it worked. After moving it to Bundle A, it stopped working.
Why is that?
Hope somebody can help.
--
Sincerely,
Philipp Leusmann
System Developer
Ebcot Business Solutions GmbH
Kreuzherrenstrasse 2
D-52062 Aachen
Telefon: +49 - (0)241 - 90 06 72 05
Fax: +49 - (0)241 - 4 09 15 81
http://www.ebcot.de
Reg.-Nr. HRB 116 74, Amtsgericht Aachen. Hauptsitz Aachen
Vertretungsberechtigte Geschäftsführer:
Andreas Hauser, Michael Kalinowski, Oliver Wolff
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| Re: Classloading issue for overwritten classes [message #633805 is a reply to message #633795] |
Tue, 19 October 2010 13:43  |
Philipp Leusmann
Messages: 36
Registered: July 2009 |
Member |
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Hi Tom,
thanks for your help.
In both bundles it was configured as a required bundle.
Seconds before reading your answer I took the chance to move the bundle
containing the jboss-resources up in the list of required bundles. And
it worked!
OSGi is really, really strange!
Thanks anyway,
Philipp
Am 19.10.2010 15:16, schrieb Thomas Watson:
> All bundles involved that you want to load the javax.xml.ws from the
> jboss bundle will need to use Import-Package header for the javax.xml.ws
> package. In addition the Import-Package will need to have matching
> attributes to force the framework to resolve the import to the export
> provided by the jboss bundle. I hope the jboss bundle exports the
> package with a specific version. If so then you can specify a version
> range on your Import-Package header:
>
> Import-Package: javax.xml.ws; version="1.0"
>
> The framework also exports the javax.xml.ws package but at no version so
> specifying version="1.0" will force the framework to wire your bundle to
> the exporter of javax.xml.ws with at least a version of 1.0.
>
> As to why the code worked in bundle B but not in bundle A, did bundle be
> depend on the jboss bundle by using Import-Package: javax.xml.ws or
> Require-Bundle? If so then it likely is loading the javax.xml.ws package
> through that constraint.
>
> HTH
>
> Tom.
>
--
Sincerely,
Philipp Leusmann
System Developer
Ebcot Business Solutions GmbH
Kreuzherrenstrasse 2
D-52062 Aachen
Telefon: +49 - (0)241 - 90 06 72 05
Fax: +49 - (0)241 - 4 09 15 81
http://www.ebcot.de
Reg.-Nr. HRB 116 74, Amtsgericht Aachen. Hauptsitz Aachen
Vertretungsberechtigte Geschäftsführer:
Andreas Hauser, Michael Kalinowski, Oliver Wolff
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