Hi Juan
I absolutely aggree, and it probably will be implemented at some point -
giving us the chance to use it if necessary (and with causion).
Having looked deeper into spec I think filters are definately a better
solution - its just like the old debate about inheritance vs. delegation,
the obvious idea is to use inheritance, but when you take all the details
into account, you end up with using delegation (filters). One advantage
being that the filters you develop can easily be combined or used in later
projects. A nice feature it is!
Randahl
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Juan Lorandi
(Chile)
Sent: 31. maj 2001 17:06
To: Orion-Interest
Subject: RE: bugs in <@page extends="...."> in Orion implementation?
take a look at the generated .java file created with your servlet
template(JSP)
you'll see that many of the features orion implements (session, page,
context var) is made at this time.
what you propose is walking around the spec, so your jsp pages will depend
on how orion translates them into a servlet, thus rendering them not
portable across web servers. Anything you can accomplish by using this new
base class, can be accomplished by either using filters or by implementing
your own security and session management thru Orion UserManager and
HTTPSessionManager. Tough the earlier can be plugged in seamlessly, the
latter doesn't have a configuration tag that allows it. The interface,
however, is available since version 1.4.5 at least, and Orion uses it
internally with two implementations, normal session and clustered sessions.
I agree with you that the feature should be there, but it would be necessary
only to work around (transient) web server limitations, and render the code
unportable. It should be in orion, but must be used wisely.
JP
> -----Original Message-----
> From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]]
> Sent: Miércoles, 30 de Mayo de 2001 3:29
> To: Orion-Interest
> Subject: RE: bugs in <@page extends="...."> in Orion implementation?
>
>
> Hi Juan
>
> I get your point about multiple inheritance, but say the web
> server would
> like all JSP pages to extend from class WebServerXYZPage,
> then one could
> just create a class which extends this web server class so that
>
> The JSP page EXTENDS MyClass which EXTENDS WebServerXYZPage
>
> This way, the web server has got room for its callbacks. Of
> course, this
> gives you a very tight coupling to the web server product
> (wherefore I for
> one would not use it), but I still don't see why this is not
> possible with
> Orion - I have been told that other EJB servers support this.
>
>
> Yours
> Randahl
>
>
>
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Juan Lorandi
> (Chile)
> Sent: 29. maj 2001 22:45
> To: Orion-Interest
> Subject: RE: bugs in <@page extends="...."> in Orion implementation?
>
>
> I believe this could be better modeled differently, because
> it leaves no
> room for the web server to implement its callbacks and java
> doesn't support
> multiple inheritance.
>
> > -----Original Message-----
> > From: Randahl Fink Isaksen [mailto:[EMAIL PROTECTED]]
> > Sent: Martes, 29 de Mayo de 2001 3:01
> > To: Orion-Interest
> > Subject: RE: bugs in <@page extends="...."> in Orion implementation?
> >
> >
> > Well, can anyone confirm that JSP pages can extend your own
> > class when using
> > Orion??? Or has noone been able to use "@page extends"?
> >
> > I see many good reasons for implementing your own super class
> > for your JSP
> > pages. For instance, such a superclass could do logging of
> all client
> > activities or it could do security checking.
> >
> >
> > Randahl
> >
> > -----Original Message-----
> > From: [EMAIL PROTECTED]
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Robert
> > Nicholson
> > Sent: 25. maj 2001 21:15
> > To: Orion-Interest
> > Subject: RE: bugs in <@page extends="...."> in Orion implementation?
> >
> >
> > It's doing you a favour.Please elaborate on why you want to extend
> > that class.
> >
> >
> > > -----Original Message-----
> > > From: [EMAIL PROTECTED]
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of
> > Jiuyun Wang
> > > Sent: Friday, May 25, 2001 9:20 AM
> > > To: Orion-Interest
> > > Subject: Re: bugs in <@page extends="...."> in Orion
> implementation?
> > >
> > >
> > > It doesnot work, not matter which one (servlet/jspbase) I
> extends my
> > > jsp, orion jsp compiler just don't support extends....
> > >
> > > -Jiuyun
> > > --- SCOTT FARQUHAR <[EMAIL PROTECTED]> wrote:
> > > > It looks like your page should extend servlet and not jsppage.
> > > >
> > > > Just change JSPBase to extend servlet (and make the required
> > > > changes).
> > > >
> > > > I haven't read the spec, but I imagine that extending
> > > > OrionHttpJspPage is proprietary, and would not be part of
> > the spec.
> > > >
> > > > Scott
> > > >
> > > > >>> [EMAIL PROTECTED] 05/23/01 05:42am >>>
> > > > I create a class called JSPBase class which extends
> > OrionHttpJspPage,
> > > > and I put the <@ page extends="packagename.JSPBase"> in
> > my JSP file.
> > > > however, orion give the following error:
> > > >
> > > > Superclass of the JSP page does not implement
> > Servlet, invalid
> > > > extends attribute.
> > > >
> > > > Does orion implement <@page extends> correctly?
> > > >
> > > > Any clarification?
> > > >
> > > > -Jiuyun
> > > >
> > > >
> > > > __________________________________________________
> > > > Do You Yahoo!?
> > > > Yahoo! Auctions - buy the things you want at great prices
> > > > http://auctions.yahoo.com/
> > > >
> > > >
> > > >
> > >
> > >
> > > =====
> > > Jiuyun Wang M.Sc. of Computer Sciences
> > > Sun Certified Programmer for Java 2 Platform
> > > IBM Certified Solution & Enterprise Developer
> > > Phone: 919-696-0419(cel)
> > > Email: [EMAIL PROTECTED]
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Yahoo! Auctions - buy the things you want at great prices
> > > http://auctions.yahoo.com/
> > >
> >
> >
>
>
