What do you mean with 'local scope'? There are multiple clients that share
simultaneously the same application, which is execute on one web-server.
If we use Java applications as clients, every user gets his own local
singleton-instance, that manage user-specific settings. In connection with JSP
there would be instanciated one instance per web-server, that is shared by multiple
sessions (users), isnt't it?

Joseph Ottinger wrote:

> >I want to use the singleton-pattern in my application but when JSP-pages
> >serve as clients, every session should use it's own instance of the
> >singleton. How can I manage?
>
> Put the singleton in local scope for the application.
>
> >It is possible (how?) to start a new JVM for every new session? - I'm
> >using the Borland Application Server with Tomcat.
>
> YIKES! I shudder to even THINK about this...
>
> You don't need to, you don't want to, unless Tomcat's far more broken than I
> thought. Classes are local to each application; if your singleton is located
> in WEB-INF/classes, for example, they exist only for that application
> (although CLASSPATH rules still apply.)
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Some relevant FAQs on JSP/Servlets can be found at:

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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

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