On Tuesday 18 July 2006 02:12, SourceForge.net wrote:
> Initial Comment:
> We're using plugins similar to Eclipse's to decouple
> functionality. Each plugin's classes run in their own
> class loader. specifically, a plugin can have a MyPage
> class (this is done by having our implementation of
> Application that iterates over the XXXPage classes for
> each plugin and uses mount and url coding strategy to
> make the XXXPage accessible from a url)
Also note that the serialization used for cloning has already been upgraded to
use ClassResolver instead. See the thread "Wicket and OSGi" started 20th May.
<quote src="dev list, 2 June">
Hi,
A small patch is required for model versioning to work for wicket in
OSGI environment.
Case:
The [ClassNotFoundException] is thrown when Objects#cloneModel or
Objects#cloneObject tries to clone objects that the class is not
resolveable by the Class#forName (used by ObjectInputStream) .
Possible solution:
<code fileName="wicket/util/lang/Objects.java">
package wicket.util.lang;
public abstract class Objects
{
...
private static final class ReplacedObjectInputStream extends ObjectInputStream
{
....
// Note:
// This overide is required to resolve classess inside in different
bundle, i.e.
// The classess can be resolved by OSGI classresolver implementation
protected Class resolveClass(ObjectStreamClass desc)
throws IOException, ClassNotFoundException
{
String className = desc.getName();
Application application = Application.get();
IApplicationSettings applicationSettings =
application.getApplicationSettings();
IClassResolver classResolver = applicationSettings.getClassResolver();
// TODO: How to deal with classResolver that throw RuntimeException?
Class candidate = classResolver.resolveClass(className);
if( candidate == null )
{
candidate = super.resolveClass( desc );
}
return candidate;
}
}
....
}
</code>
This modification does not break wicket testcases :)
Regards,
Edward Yakop
</quote>
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