Ok. I think I've followed you. Is this the point where we should file a
bug report? Or direct this subject to someone else with more experties,
like Sacha, for instance?
Maybe he can validate this guess... From what you know, wich JBoss
developer is more confortable with the RMI Classloading implementation?
Thank you for your fast analysis, Jules.
Joao Clemente
On Wed, 2 Apr 2003, Jules Gosnell wrote:
> Hmmm...
>
> I guess I must have made the assumption that if a class was available to
> the src webapp to serialise, then it would be available to the
> destination webapp to deserialise...
>
> That may have been a mistake as it looks like your src webapp has
> managed to obtain a proxy for an EJB, which can be serialised to a
> destination webapp which cannot deserialise it as it does not have the
> class to hand...
>
> I guess we need to integrate this deserialisation with JBoss' RMI
> classloading...
>
> As far as I understand it, when you obtained the proxy via RMI, it was
> shipped to you with a tag containing a URL from which it's class could
> be downloaded. This pointed back to the JBoss WebServer (a confusing
> misnomer for an HttpServer which only serves Classes).
>
> When your source webapp ships the same proxy to your destination webapp,
> it needs it's class to deserialise it. It should retireve it from the
> same URL, but something is obviously going wrong. This is not really my
> area, but if you know anything about RMI and classloading, this should
> give you a good start.
>
>
> Jules
>
> P.S.
>
> This is my best guess - it could be wrong...
> > ---------- Forwarded message ----------
> > Date: Tue, 11 Mar 2003 16:48:04 -0000 (WET)
> > From: [EMAIL PROTECTED]
> > Reply-To: [EMAIL PROTECTED]
> > To: [EMAIL PROTECTED]
> > Subject: [JBoss-user] JGStore Error: cannot assign instance of $Proxy90 to
> > field..
> >
> > I've used the CVS version to overcome the
> >
> > ERROR [JGStore] could not demarshal incoming update
> > java.lang.ClassNotFoundException
> >
> > but now I got a new one:
> > Cannot assign instance of $Proxy<xx>
> > to field <remote.reference.to.ejb>
> > of type <ejb.interface>
> > in instance of <servlet.that.contains.reference>
> >
> > ERROR [org.mortbay.j2ee.session.JGStore] could not demarshal incoming update
> > java.lang.ClassCastException: cannot assign instance of $Proxy90 to field
> > inocrea.web.webmail.model.JwmaFolderImpl.remote of type
> > inocrea.ejb.mail.interfaces.MailFolder in instance of
> > inocrea.web.webmail.model.JwmaFolderImpl
> > at
> > java.io.ObjectStreamClass$FieldReflector.setObjFieldValues(ObjectStreamClass.java:1840)
> > at java.io.ObjectStreamClass.setObjFieldValues(ObjectStreamClass.java:1062)
> > at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1851)
> > at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
> > at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
> >
> > I'll post the code I find relevant of the servlet in question:
> >
> >
> > /*snip*/
> > import inocrea.ejb.mail.interfaces.MailFolder;
> > /*snip*/
> >
> > public class JwmaFolderImpl
> > implements JwmaFolder, JwmaTrashInfo, JwmaInboxInfo, Serializable {
> > protected MailFolder remote;
> > protected FolderVO vo;
> >
> > public JwmaFolderImpl(MailFolder mailFolder) {
> > remote = mailFolder;
> > try {
> > vo = remote.getFolderVO();
> > } catch(RemoteException e) {
> > Log1.error(""+e);
> > }
> > }
> >
> >
> > Any tip? Thank you
> > Joao Clemente
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