> Sachin Aggarwal wrote:
>
> >(You will run into some
> > minor issues apropos the visibility of the session object (usually
> > created within a service() method), but you can get around it
> > nevertheless)
>
> What kind of problem ?
Never mind. :) I was on another train of thought there...no problems
with the session.
> >
> > But if you want the servlet to call the *JSP error page*, you *have*
>
> > to place the throwable object within the request object,
> >......
>
> Got it ! I didn't realise the author was talking about *JSP error
> page*.
>
> BTW would you not recommend having your own error handling page so
> that you have more control as to what and how you want to display the
> error ?
A JSP error page just for the controller servlet? Well, it is actually a
philosophical design issue. I like using multiple error pages myself,
rather than a generalized one. Actually, I'd like to use error pages for
specific resources (db, legacy, ejb, web container, etc) rather than one
for each servlet or JSP page, and have them shared by multiple
JSPs/servlets. I also add the URI to the request before forwarding to
the error page so I know the source of the exception.
> > Sure, you can store the exception within the session object,
> > call sendRedirect() within the exception handler, and forward it
> > to *some* JSP page or servlet. (You will run into some
> > minor issues apropos the visibility of the session object (usually
> > created within a service() method), but you can get around it
> > nevertheless)
> >
> > But if you want the servlet to call the *JSP error page*, you *have*
>
> > to place the throwable object within the request object, tag
> > it appropriately, and then perform a forward using a
> > request dispatcher to the delegate error page. This is
> > needed because the implicit "exception" object is
> > created by doing a getValue() on the
> "javax.servlet.jsp.jspException"
> > attribute expected within the request object.
> >
> > If the specified attribute in not located within the request, then
> > the JSP engine usually throws an "Error: 500 Unknown Exception"
> > error.
> >
> > Govind
> > > Sachin Aggarwal wrote:
> > >
> > > What are the reasons for not using the following approach ?
> > >
> > > Save the exception as a session object and call sendRedirect on
> the
> > > response object. This way you can redirect to a page even
> > if you have
> > > written to the printWriter.
> > >
> > > > -----Original Message-----
> > > > From: Govind Seshadri [mailto:[EMAIL PROTECTED]]
> > > > Sent: Tuesday, December 14, 1999 9:13 PM
> > > > To: [EMAIL PROTECTED]
> > > > Subject: Re: Using Error Pages from servlets
> > > >
> > > >
> > > > Arun Thomas wrote:
> > > > >
> > > > > Hello all,
> > > > >
> > > > > Can anyone point me to a resource that shows how error
> > > > pages can be used
> > > > > from a servlet.
> > > > > I've got an error page that I am using for exceptions
> > > > generated in my jsp
> > > > > pages, and
> > > > > I'd like to use the same one for servlet exceptions.
> > > > Unfortunately, I
> > > > > haven't been
> > > > > able to find anyplace where the interface to an error page
> > > > is spelled out.
> > > > >
> > > >
> > > > See the jGuru JSP FAQ entry titled "Can I invoke a JSP error
> > > > page from a
> > > > servlet?" at:
> > > >
> > > http://www.jguru.com/jguru/faq/view.jsp?EID=1347
> > >
> > > Govind
> > >
> > > --
> > > Govind Seshadri <[EMAIL PROTECTED]>
> > > jGuru.com - Your Gateway to the Java Universe
> > > http://www.jguru.com
> > >
> > >
> > ==============================================================
> > =============
> > >
> > > To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff
> > > JSP-INTEREST".
> > > FAQs on JSP can be found at:
> > > http://java.sun.com/products/jsp/faq.html
> > > http://www.esperanto.org.nz/jsp/jspfaq.html
> >
> > --
> > Govind Seshadri <[EMAIL PROTECTED]>
> > jGuru.com - Your Gateway to the Java Universe
> > http://www.jguru.com
> >
--
Govind Seshadri <[EMAIL PROTECTED]>
jGuru.com - Your Gateway to the Java Universe
http://www.jguru.com
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