From: olarte.andres at gmail.com (Andres Olarte)
Date: Tue, 13 Mar 2007 09:51:54 -0800
Subject: [Pljava-dev] static variables
In-Reply-To: <2045218814.611173771869052.JavaMail.root@starjar01>
References: <3fccaa690703121552n381de9c6qf922fc58face9bb5@mail.gmail.com>
	<2045218814.611173771869052.JavaMail.root@starjar01>
Message-ID: <3fccaa690703131051j40ac089dub5aca0188cc71117@mail.gmail.com>

Why thread safe?  As far as I understand the architecture of pljava,
every connection has it's private JVM, therefore each tread (or
connection) will access each own variable.  Since I don't want to
share the private static variable among connections, it should work.
Anybody has any experience with this?

On 3/12/07, Peter Henderson <peter.henderson at starjar.com> wrote:
> I can't see any reason why you can't use static variables.
>
> Just make sure that the variable is thread safe, as multiple threads
> will be accessing it concurrently.
>
>  From looking at your code. Imagine 2 threads call your setter function,
> then call the test() function. One of the threads will be using the
> incorrect String (I guess?). So in this case using static variables
> would probably produce unexpected results!
>
>
> Andres Olarte wrote:
> > I've been starting to use pljava and find it very useful, but there's
> > something I want to know if it's possible.  I want to have a static
> > variable that I can set and retrieve during a session.  Something like
> > this:
> >
> > public static String x;
> >
> > public static String test() {
> >       if (x==null) {
> >               return "";
> >       }
> >       return x;
> > }
> >
> > public static String testString(String me) {
> >       x=me;
> >       return me;
> > }
> >
> > This is a trivial example, but what I want to do on the long run is to
> > setup a XML parser once (per session) and to avoid the overhead for
> > each calling of  the function.  Is it possible?
> >
> > Thanks a lot,
> >
> > Andres
> > _______________________________________________
> > Pljava-dev mailing list
> > Pljava-dev at gborg.postgresql.org
> > http://gborg.postgresql.org/mailman/listinfo/pljava-dev
> >
>
>
>