RPC problem?

[Brito]

RPC that is working fine in host mode but fails in web mode
and I don't know what to do to troubleshoot it. On the client, I get a
message box that says "Failure:
com.google.gwt.user.client.rpc.StatusCodeException: The call failed on
the server; see server log for details".

[Thomas Broyer]

Have you looked at your server logs? What's the status code? (use Firebug or whatever to see what the server responds: 404 → the RemoteServiceRelativePath is wrong and/or you have an issue in how you deployed your app; 500 → there was another error on the server, maybe you reached a non-RPC servlet; 405 → you reached something that doesn't accept POSTs, so it's not your RPC servlet)

[Sean]

I also recommend creating a Serialized Exception, and have ALL your RPCs do adequate error handling and throw these Serialized Exceptions for display on your page. This has made RPC debugging 3000x better. 

[András Csányi]

Sean, it sounds really good, but I'm very new at GWT and java as well.
So, would you so kind to provide a simple example which is usable?

Many thanks in advance!

--
- -
--  Csanyi Andras (Sayusi Ando)  -- http://sayusi.hu --
http://facebook.com/andras.csanyi
--  ""Trust in God and keep your gunpowder dry!" - Cromwell

[Sudhakar Abraham]

Your tomcat mapping may be incorrect as it cannot find the url mapping
for the RemoteServiceServlet you are calling. See the error on
"Apache Software Foundation\Apache Tomcat 6.0.18\logs\catalina.
2011-01-21.log" directory. Check your StatusCode of Http response.

S. Abraham
www.DataStoreGwt.com
Persist objects directly in Google App Engine

[Thad]

I uses a serialized exception. The class looks something like:

public class GwtAppException extends Exception implements Serializable
{
public GwtAppException() {
super();
// my code follows
}
public GwtAppException(String message) {
super(message);
// my code follows
}
... etc.
}

Put this somewhere that it complies for both client and server (the
way your RemoteServices do). Declare your RemoteServices methods to
throw this error.

In you client code,

AsyncCallback<String> callback = new AsyncCallback<String>() {
public void onFailure(Throwable caught) {
Window.alert((new GwtAppException(caught)).getMessage());
}
...

On Oct 21, 8:09 am, András Csányi <sayusi.a...@gmail.com> wrote:

> On 21 October 2011 13:56, Sean <slough...@gmail.com> wrote:
>
> > I also recommend creating a Serialized Exception, and have ALL your RPCs do
> > adequate error handling and throw these Serialized Exceptions for display on
> > your page. This has made RPC debugging 3000x better.
>
> Sean, it sounds really good, but I'm very new at GWT and java as well.
> So, would you so kind to provide a simple example which is usable?
>
> Many thanks in advance!
>
> --
> - -

> --  Csanyi Andras (Sayusi Ando)  --http://sayusi.hu--http://facebook.com/andras.csanyi