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Posted to users@wicket.apache.org by Ingo Adler <de...@synacon.ch> on 2010/06/04 00:52:00 UTC
strange ClassCastException in wicketstuff-push
Hi,
I'm trying to use wicketstuff-push in my project. I'm always getting a
ClassCastException in the wicketstuff-push sources, which I can't explain:
java.lang.ClassCastException:
org.mortbay.cometd.continuation.ContinuationBayeux cannot be cast to
org.cometd.Bayeux
at
org.wicketstuff.push.cometd.CometdService.initBayeux(CometdService.java:172)
at
org.wicketstuff.push.cometd.CometdService.getBayeux(CometdService.java:161)
at
org.wicketstuff.push.cometd.CometdService.publish(CometdService.java:155)
at org.xtoto.ui.comment.CommentPanel$3.onSubmit(CommentPanel.java:140)
My code is very similar to the example:
final ChannelEvent event = new ChannelEvent("chat");
event.addData("message", comment.getMessage());
getChannelService().publish(event); // -> Line 140 in CommentPanel
I'm using the trunk of wicketstuff. The org.wicketstuff.push code
compiled perfectly.
I tried different library versions - which didn't help.
Currently I'm using
cometd-api-1.1.1
cometd-client-6.1.22
cometd-server-6.1.22
jetty-6.1.22
wicket-1.4.7
When I change the code in push a little bit, from
_bayeux = (Bayeux) _application
.getServletContext()
.getAttribute(Bayeux.ATTRIBUTE); // -> line 172 in CometdService
to
ContinuationBayeux b = (ContinuationBayeux)_application
.getServletContext()
.getAttribute(Bayeux.ATTRIBUTE);
_bayeux = b;
I get a IncompatibleClassChangeError later in line:
serviceClient = _bayeux.newClient(BAYEUX_CLIENT_PREFIX);
Very strange...
Has anyone had this problem before? Any ideas?
Regards
Ingo
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Re: strange ClassCastException in wicketstuff-push
Posted by Ingo Adler <de...@synacon.ch>.
Solved.
It was a class loading problem - IntelliJ in combination with Jetty.
WebAppContext context = new WebAppContext();
...
context.setParentLoaderPriority(true); // -> Solution
Ingo
On 04.06.2010 00:52, Ingo Adler wrote:
> Hi,
>
> I'm trying to use wicketstuff-push in my project. I'm always getting a
> ClassCastException in the wicketstuff-push sources, which I can't explain:
>
> java.lang.ClassCastException:
> org.mortbay.cometd.continuation.ContinuationBayeux cannot be cast to
> org.cometd.Bayeux
> at
> org.wicketstuff.push.cometd.CometdService.initBayeux(CometdService.java:172)
> at
> org.wicketstuff.push.cometd.CometdService.getBayeux(CometdService.java:161)
> at
> org.wicketstuff.push.cometd.CometdService.publish(CometdService.java:155)
> at org.xtoto.ui.comment.CommentPanel$3.onSubmit(CommentPanel.java:140)
>
> My code is very similar to the example:
>
> final ChannelEvent event = new ChannelEvent("chat");
> event.addData("message", comment.getMessage());
> getChannelService().publish(event); // -> Line 140 in CommentPanel
>
> I'm using the trunk of wicketstuff. The org.wicketstuff.push code
> compiled perfectly.
>
> I tried different library versions - which didn't help.
>
> Currently I'm using
>
> cometd-api-1.1.1
> cometd-client-6.1.22
> cometd-server-6.1.22
>
> jetty-6.1.22
>
> wicket-1.4.7
>
> When I change the code in push a little bit, from
>
> _bayeux = (Bayeux) _application
> .getServletContext()
> .getAttribute(Bayeux.ATTRIBUTE); // -> line 172 in CometdService
>
> to
>
> ContinuationBayeux b = (ContinuationBayeux)_application
> .getServletContext()
> .getAttribute(Bayeux.ATTRIBUTE);
>
> _bayeux = b;
>
> I get a IncompatibleClassChangeError later in line:
>
> serviceClient = _bayeux.newClient(BAYEUX_CLIENT_PREFIX);
>
>
>
> Very strange...
>
> Has anyone had this problem before? Any ideas?
>
> Regards
> Ingo
>
>
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> To unsubscribe, e-mail: users-unsubscribe@wicket.apache.org
> For additional commands, e-mail: users-help@wicket.apache.org
>
>
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