You got me 'cause I was arguing about the "common" case. I didn't realize what you
meant by 'single instance'.
dave.
Cezar Totth wrote:
> On Tue, 18 May 1999, David Mossakowski wrote:
>
> > No servlet engine I know of creates two instances of a servlet the way you
> > describe it.
> There seem to be some... at least those distributed (dispatching
> requests across multiple JVMs) pretend are capable of that.
>
> > The init() method is "guaranteed" (from Servlet API) to be called
> > only once at start up.
> Once when fire the same instance, yes - I was not arguing about the
> "common" case when engines create only one instance of a servlet,
> I asked if there is a way to prevent them not to create the second..
>
> > You can store variables that will be common to all threads by putting them in
> > context. (context.setAttribute())
> But then any other servlet (and those written at evil.programmers.org)
> will be able to grab that public data. (let say we talk about a database
> pool wich gives access to company's accounting tables)
>
> >
> > Check the servlet API.
> checked, its in version 2.1 only
>
> Cezar.
>
> > Cezar Totth wrote:
> >
> > > On Mon, 17 May 1999, jon * wrote:
> > >
> > > > > I would like a "SingleInstanceServlet" interface,
> > > > > in order to force servlet engine NOT to create multiple
> > > > > instances of a certain servlet.
> > > > >
> > > > > This would guarantee that all concurent requests share the same
> > > > > local variables.
> > > >
> > > > Why in the world would you want to take the multi-user nature of serving
> > > > dynamic websites and focus that into a single threaded system? What exactly
> > > > would you gain by doing that?
> > > >
> > > Hi, not single-threaded was what I meant.. I said single instance -
> > > multithreaded, of course (except for the case it implements
> > > SingleThreadedModel too - when it becomes single-threaded).
> > >
> > > I suppose some servlet engines create (are not restricted from creating)
> > > multiple instances for the same servlet, for distributed-engines
> > > or STM model optimisations.
> > >
> > > Sometimes I dont want that to happen, like when I want to
> > > keep some entity-data (global object, shared betwen all sessions)
> > > in local variable, and need to be sure that these variables are unique,
> > > not (re)created at each servlet.init() call.
> > >
> > > Cezar
> > >
> > > ___________________________________________________________________________
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> > --
> > David Mossakowski [EMAIL PROTECTED]
> > http://www.dwdog.com/styk 212.310.7275
> >
> > "I don't sit idly by, I'm planning a big surprise"
> > F U G A Z I
> >
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--
David Mossakowski [EMAIL PROTECTED]
http://www.dwdog.com/styk 212.310.7275
"I don't sit idly by, I'm planning a big surprise"
F U G A Z I
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