>>> A good question or two may be: Are there <any> uses for <%! %> variables
?
and if not, why were they included in the original JSP specifications doc
?<<<
Method declaration. This is when they're valid, useful, and, in my opinion,
indespensible. For these reasons, the JSP specification would have been
incomplete without them.
But I agree with Geert. Using them for varialbe declaration is easy to stuff
up unless you understand exactly how page translation works. I imagine that
misutilisation for variable declaration would be a common source of trouble
out there in we-half-know-what-we're-doing land.
Rob
----- Original Message -----
From: "M. Simms" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, March 18, 2001 6:26 PM
Subject: Re: Spawning a thread
> re: "..shouldn't use <%! %> tags to declare variables unless you know very
> well what you're doing. But, alas, we see so many examples who do it wrong
> (and people sometimes are upset if you tell them about it)"
>
> A good question or two may be: Are there <any> uses for <%! %> variables ?
> and if not, why were they included in the original JSP specifications doc
?
>
> > -----Original Message-----
> > From: A mailing list about Java Server Pages specification and reference
> > [mailto:[EMAIL PROTECTED]]On Behalf Of Geert Van Damme
> > Sent: Saturday, March 17, 2001 2:40 PM
> > To: [EMAIL PROTECTED]
> > Subject: Re: Spawning a thread
> >
> >
> > I'm very sorry, but I really think you're interpreting this the other
way
> > around.
> > isThreadSafe=true doesn't mean that JSP's are thread safe by default.
au
> > contraire,
> > it means that they run in a multithreaded environment and are _assumed_
to
> > be thread safe by the servlet engine. If they are not, you might specify
> > isThreadSafe=false to make the servlet engine use the singleThreadModel.
I
> > really think you should never do this in a real application. It
> > has too many
> > performance problems.
> >
> > Most of the JSP pages are thread safe because they only use local
> > variables.
> > That's one of the reasons I mentioned it on this thread several times
> > already that you shouldn't use <%! %> tags to declare variables unless
you
> > know very well what you're doing. But, alas, we see so many
> > examples who do
> > it wrong (and people sometimes are upset if you tell them about it).
> > Anyway, if you just declare your variables locally in <% %> tags or in
> > custom tags, you shouldn't worry too much about thread safety.
> >
> > But that has hardly anything to do with the original question.
> > well, of course you can spawn a thread in a JSP
> > <% new Thread(){
> > public void run(){
> > // your code
> > }
> > }.start();%>
> > But it's cleaner to put that in a separate object, not in the
> > page directly.
> >
> > Geert Van Damme
> >
> >
> >
> > > -----Original Message-----
> > > From: A mailing list about Java Server Pages specification and
reference
> > > [mailto:[EMAIL PROTECTED]]On Behalf Of vikas m pawar
> > > Sent: zaterdag 17 maart 2001 19:01
> > > To: [EMAIL PROTECTED]
> > > Subject: Re: Spawning a thread
> > >
> > >
> > > JSP pages are by default thread safe(isThreadSafe=true)
> > > If set to false, the JSP page uses the Single Thread Model.
> > > Regards
> > > Vikas
> > > ___________________________________________________
> > >
> > >
> > > To know recursion, you must first know recursion.
> > >
> > > _____________________________________________________
> > > Chat with your friends as soon as they come online. Get Rediff Bol at
> > > http://bol.rediff.com
> > >
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> > > Some relevant FAQs on JSP/Servlets can be found at:
> > >
> > > http://java.sun.com/products/jsp/faq.html
> > > http://www.esperanto.org.nz/jsp/jspfaq.html
> > > http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
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> > >
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> >
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> > http://www.esperanto.org.nz/jsp/jspfaq.html
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>
>
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>
> http://java.sun.com/products/jsp/faq.html
> http://www.esperanto.org.nz/jsp/jspfaq.html
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
> http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
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http://www.esperanto.org.nz/jsp/jspfaq.html
http://www.jguru.com/jguru/faq/faqpage.jsp?name=JSP
http://www.jguru.com/jguru/faq/faqpage.jsp?name=Servlets
