Sure enough, I just had a chance to try it:
putting:
<action path="/unknown" unknown="true"
forward="/unknownmapping.jsp" />
as one of the actions inside the action mappings. forwards to whatever
page /unknownmapping.jsp is. It keeps the url reference (actually does a
forward) and tells the user that the action isn't recognized.
Brian
Brian K Bonner <brian.bonner@xxxxxxxxxxxx> wrote on 12/10/2004 04:39:48
PM:
> 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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