At 04:11 25/07/2001 -0700, you wrote:
>Ismael,
>
>Beware of static variables in servlets.
>
>Use application level variables...initialized from the init(). Put this in
>any servlet, just as long as its used at least once.
>
> public void init(ServletConfig config) throws ServletException {
> super.init(config);
>
> Long counter = (Long)getServletContext().getAttribute("counter");
>
>
> if (counter == null) {
>
> counter = new Long(0);
> getServletContext().setAttribute("counter",counter);
>
> }
>
>
> }
>
>
>Then throughout your web application in jsp's or servlets you can increment
>your counter.
>
>static variables are only for one servlet class, so if you have more than
>one servlet or jsp, it won't work.
Static variables from a class represent a variable that should be share by
all the instances of this class. On my jsp I use this
as a counter, and this variable should be share by all the resquests. Using
this mechanism is lighter and faster than using a varible stored
on the servlet context. Maybe this way it works, but I think that using a
static variable should also work.
Regards,
Ismael
>Regards,
>
>the elephantwalker
>
>
>-----Original Message-----
>From: [EMAIL PROTECTED]
>[mailto:[EMAIL PROTECTED]]On Behalf Of Ismael
>Sent: Wednesday, July 25, 2001 2:33 AM
>To: Orion-Interest
>Subject: Re: Very Strange problem with a static varible on a jsp
>
>
>Sorry, But I do not understand what you mean.
>What I want is to have only a counter for all the requests.
>
>
>At 13:35 24/07/2001 -0500, you wrote:
> >Instead of static I would use a member attribute, since for servlets
> >only one instance exists for a given class.
> >
> >Ismael wrote:
> >
> > > I am making some loading tests, in order to test the loading tool I
> > > have written some special jsp to deal verify the number of times a jsp
> > > has been called.
> > > My jsp is :
> > >
> > > <%@page contentType="text/html"%>
> > > <html>
> > > <head><title>JSP Page</title></head>
> > > <body>
> > > <%!
> > > static int client=0;
> > > static String attribute_name="client";
> > > static Object lock=new Object();
> > > %>
> > > <%-- This JSP will be used with 4 other jsp to test the correctness of
> > > the stress tool
> > > --%>
> > > <%
> > > synchronized (application) {
> > > session.setAttribute(attribute_name,new Integer(++client));
> > > System.out.println("Entering client "+client);
> > >
> > >
> > > }
> > > %>
> > > </body>
> > > </html>:
> > >
> > >
> > > It is very simple but the ouput I get is
> > > Entering client 1
> > > Entering client 2
> > > Entering client 3
> > > Entering client 4
> > > Entering client 1
> > > Entering client 1
> > > Entering client 1
> > > Entering client 1
> > > Entering client 1
> > > Entering client 5
> > > Entering client 2
> > > Entering client 3
> > > Entering client 4
> > > Entering client 5
> > > Entering client 6
> > > Entering client 7
> > > Entering client 8
> > > Entering client 9
> > > Entering client 10
> > > Entering client 11
> > > Entering client 12
> > > Entering client 13
> > > Entering client 14
> > > Entering client 15
> > > Entering client 16
> > > ..
> > > That is, my static variable it is being ignored. I am using Orion
> > > 1.4.5 , Windows 2000 and J2SE 1.3.0_02.
> > >
> > > Anybody know why this could be happening ?
> > >
> > > Regards,
> > > Ismael
> > >
> > >
