Most likely, your servlet runner uses a new servlet classloader for each
defined servlet. Even though they use the same class file, its the
combination of the class file + classloader that make up a unique Class in
the JVM. As a test, try putting your servlet class file in a directory that
is in the system classpath. If you want to share information this way
between servlets, you could have a seperate class that is in the system
classpath that is referenced (loaded) in your init().
I am sure that there are others on this list who can give you better ways to
share info between servlets.
John Zerbe - Mellon Bank
IM&R - Middleware Team
Phone: 412-234-1048 E-Mail:[EMAIL PROTECTED]
> -----Original Message-----
> From: Dr. Dragomir D. Dimitrijevic [SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, October 06, 1999 12:56 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Sharing static variables between servlets.
>
> I have the same problem with Apache/Jserv. All servlets use
> a pool of global static variables and methods defined in
> a class Globals. Each servlet kicks-off its own JVM so
> I end-up using more memory. Luckily,
> variables are read-only.
>
> So, I would like to know the solution too.
>
> DD
>
> ----------
> From: David Finch[SMTP:[EMAIL PROTECTED]]
> Sent: Wednesday, October 06, 1999 06:11 PM
> To: [EMAIL PROTECTED]
> Subject: Sharing static variables between servlets.
>
> Hi all,
> I'm having trouble with what should be a simple feature: sharing a
> static variable between two instances of the same servlet class.
>
> Take the following example to demonstrate the problem...
>
> import java.io.*;
> import javax.servlet.*;
> import javax.servlet.http.*;
>
> public class MyCounter extends HttpServlet
> {
> private int counter = 0;
> static int globalCounter = 0;
>
> public void doGet(HttpServletRequest req, HttpServletResponse res) throws
> ServletException, IOException
> {
> res.setContentType("text/html");
> PrintWriter out = res.getWriter();
> out.println("<HTML><BODY>");
> out.println("Count ="+(counter++)+"<br>Global count =
> "+(globalCounter++));
> out.println("</BODY></HTML>");
> }
> }
>
> >From here I configured the Servlet Attibutes twice with distinct names,
> but both pointing to the same class. I then configured two virtual paths
> for each of these servlets. However, they then run independently of each
> other: i.e. as though each servlet were running in a seperate JVM? The
> static counter behaves just as though it were not static. Is this the
> correct way to get two servlets to run from the same class?
>
> FYI: I'm using Netscape Enterprise Server 4 SP1.
>
> Thanks in advance.
>
> David Finch.
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