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RE: [cinjug-users] Struts question: how do you handle an undefined Actio

To: users@xxxxxxxxxx
Subject: RE: [cinjug-users] Struts question: how do you handle an undefined ActionForward value?
From: Brian K Bonner <brian.bonner@xxxxxxxxxxxx>
Date: Fri, 10 Dec 2004 16:39:48 -0500
Delivered-to: mailing list users@cinjug.org
In-reply-to: <OFDAD99840.32BC5362-ON85256F66.0073C805-85256F66.0076656A@kroger.com>
Mailing-list: contact users-help@cinjug.org; run by ezmlm
Cool.

Brian

steve.gutter@xxxxxxxxxx wrote on 12/10/2004 04:33:12 PM:

> 
> 
> 
> 
> unknown="true" worked fine (and, as is expected, you can only define one
> action
> with the attribute unknown="true")
> 
> getUnknown sounds like its working as documented:
> it returned "true" when invoked from the action class defined with
> unknown="true",
> and returned "false" for 'regular' action classes.
> 
> Thanks for the info!
> 
> 
>  
>                       Brian K Bonner  
>                       <brian.bonner@par        To: 
> users@xxxxxxxxxx  
>                       aware.com>               cc:  
>                                                Subject:  RE: 
> [cinjug-users] Struts question: how do you handle an undefined  
>                       12/10/2004 03:24          ActionForward value?  
>                       PM  
>                       Please respond to  
>                       users  
>  
>  
> 
> 
> 
> 
> Steve, if you configure unknown="true" as part of your action mapping,
> this action will be used if no action mapping is found and will forward 
to
> the appropriate mapping.
> 
> I have not done this (or tried it), but I just checked the java doc for
> ActionConfig and found that getUnknown indicates if this ActionConfig is
> the default config in case none is found.
> 
> thanks for the question--helped me learn something.
> 
> Give that a try and report back :)
> 
> Brian
> 
> "Hill, Richard" <Rich.Hill@xxxxxxxxxx> wrote on 12/10/2004 03:00:32 PM:
> 
> > Subclassing ActionMapping definitely sounds like the most straight
> > forward approach.  I'm kind of
> > surprised there isn't any error thrown as it is.  I would also think
> > that Struts would allow a default
> > handler for if no matches occur.  Subclassing does seem to be the
> > easy route though.
> >
> > -----Original Message-----
> > From: Brian K Bonner [mailto:brian.bonner@xxxxxxxxxxxx]
> > Sent: Friday, December 10, 2004 3:02 PM
> > To: users@xxxxxxxxxx
> > Subject: Re: [cinjug-users] Struts question: how do you handle an
> > undefined ActionForward value?
> >
> > Good question.
> >
> > You're basically returning a null ActionForward from your Action,
> because
> > the page is not found by the ActionMapping.  It *is* because you have 
a
> > programming error in your app.
> > You could subclass ActionMapping to return an error page if a forward 
is
> 
> > not found (to help you as the programmer).  What do other struts folks
> do?
> >
> > Brian
> >
> > steve.gutter@xxxxxxxxxx wrote on 12/10/2004 01:09:06 PM:
> >
> > >
> > > Granted that it shouldn't happen, but how do you handle the
> circumstance
> > > when the ActionModel class's
> > > execute method returns an ActionForward value which is not defined 
as
> a
> > > forward name= value
> > > in the ActionModel's action definition in struts-config.xml?
> > >
> > >
> > > It causes the app to go to a blank page, but no exceptions, etc. are
> > > thrown.
> > >
> > > I'm using the action entry with unknown="true" for the case where I
> have
> > an
> > > href="xyz.do" and there is no
> > > action defined for /xyz (which, again, granted shouldn't happen), 
but
> > this
> > > doesn't catch the other scenario.
> > >
> > >
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