Catch all exceptions in the server, and throw a new exception in its
place that the client can handle. You might like to create an exception
class, put that into the throws clause, then then only throw that class
or subclasses of it.
try {
doSomething();
} catch (QueryParseException qpe) {
throw new MyException(qpe.getMessage());
}
Gerasimos Tzoganis wrote:
> Thanks a lot.
> The problem is that I can't put a throw clause in the service
> interface method (on the client side), because the exceptions I am
> interesting in are not part of gwt, but of the jena API (so there will
> be the error :
> [ERROR] Line 19: No source code is available for type
> com.hp.hpl.jena.query.QueryParseException; did you forget to inherit a
> required module?)
>
> But I threw the exception only on the service implementation method,
> without prior declaration in the interface method) and that seems to
> work so far. I hope this will do.
>
> > Date: Wed, 29 Jul 2009 16:36:57 +0100
> > From: [email protected]
> > To: [email protected]
> > Subject: Re: Handling servre side exceptions and displaying precise
> error messages on the client
> >
> >
> > If you're using RPC, then you should make sure that your server will
> > only throw exceptions that are declared in the throws cause of the
> > service interface method (or exceptions that are a subtype of whatever
> > is declared).
> >
> > This means catching exceptions server-side and re-throwing an
> > appropriate exception, as well as making sure there's a throws clause on
> > your service interface methods.
> >
> > Gerasimos Tzoganis wrote:
> > > No one has an answer to this?
> > > It is part of my application to show to the user exactly the error, eg
> > > because perhaps he has submitted a misformed query, like in the error
> > > log I have atached. Can't I get this somehow to te client side?
> > >
> > > > Date: Tue, 28 Jul 2009 16:00:45 -0700
> > > > Subject: Handling servre side exceptions and displaying precise
> > > error messages on the client
> > > > From: [email protected]
> > > > To: [email protected]
> > > >
> > > >
> > > > I am trying to create an application using jena API and gwt. How
> can I
> > > > get an exception from the server log displayed on the client? To be
> > > > more specific: Right now I get on the client the standard message of
> > > > unexpected exceptions
> > > > "com.google.gwt.user.client.rpc.StatusCodeException: The call failed
> > > > on the server; see server log for details".
> > > >
> > > > On the server log:
> > > > [WARN] StandardContext[]Exception while dispatching incoming RPC
> call
> > > > com.google.gwt.user.server.rpc.UnexpectedException: Service method
> > > > 'public abstract java.lang.String
> > > > com.diplomatiki.mypackage.client.MyService.myMethod2
> > > > (java.lang.String,java.lang.String)' threw an unexpected exception:
> > > > com.hp.hpl.jena.query.QueryParseException: Lexical error at line 1,
> > > > column 10. Encountered: <EOF> after : "dfasfFSFS"
> > > >
> > > > ...
> > > > ...
> > > >
> > > > Caused by: com.hp.hpl.jena.query.QueryParseException: Lexical
> error at
> > > > line 1, column 10. Encountered: <EOF> after : "dfasfFSFS"
> > > > at
> com.hp.hpl.jena.sparql.lang.ParserSPARQL.perform(ParserSPARQL.java:
> > > > 95)
> > > > at com.hp.hpl.jena.sparql.lang.ParserSPARQL.parse(ParserSPARQL.java:
> > > > 39)
> > > > at com.hp.hpl.jena.query.QueryFactory.parse(QueryFactory.java:129)
> > > > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:72)
> > > > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:43)
> > > > at com.hp.hpl.jena.query.QueryFactory.create(QueryFactory.java:31)
> > > >
> > > > I want to display the actual error on the client side (or even
> better
> > > > a description of my own), is that possible?
> > > >
> > > > I have read the documentation and found no way to do this. I
> searched
> > > > the forum and there was a solution based on serializableexception,
> > > > which is deprecated now.
> > > >
> > > > Please help me with this one, I would appreciate it much.
> > > >
> > > > Thanks,
> > > > Gerasimos
> > > >
> > > >
> > > >
> >
> >
> >
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