Alvaro,
You certainly can easily use a Filter with your JSPs.
Take a look at the jsp-examples webapps included with tomcat. If you
look at WEB-INF/web.xml and the structure of WEB-INF/classes/ you
should see how to use the example that Jim provided.
For example RequestDumper:
In web.xml
<filter-mapping>
<filter-name>Request Dumper Filter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
In classes/filters/RequestDumper.java:
public void doFilter(ServletRequest request, ServletResponse
response,
FilterChain chain)
throws IOException, ServletException {
if (filterConfig == null)
return;
// Render the generic servlet request properties
StringWriter sw = new StringWriter();
PrintWriter writer = new PrintWriter(sw);
writer.println("Request Received at " +
(new Timestamp(System.currentTimeMillis())));
....
// Log the resulting string
writer.flush();
filterConfig.getServletContext().log(sw.getBuffer().toString());
// Pass control on to the next filter
chain.doFilter(request, response);
}
I'm sure you can combine these examples.
Good luck. Don't be afraid of Servlets they are your friend. You'll
certainly want to know them if you need to do any binary content.
Regards,
Dave
On Jun 3, 2008, at 10:15 AM, Álvaro Morillas (Sortes Ing. Inf. S.L.)
wrote:
Although I don't use servlets, only jsp's, it's a solution I've
thought,
using a log taglib. The problem is that I must insert the code in
every jsp
and it's painful XD
I was looking for an easier solution if it's available.
Thanks anyway :)
Álvaro Morillas Correa
VicioJuegos.com - Sortes Ing. Inf., S.L.
Plaza Mayor, 25, 1º, Of. 9-B
28911 Leganés (Madrid)
Teléfono: 916943388 – Móvil: 617315926
Horario: L-J: 9:00-14:00, 15:00-18:30 | V: 9:00-15:00
-----Mensaje original-----
De: Jim Cox [mailto:[EMAIL PROTECTED]
Enviado el: martes, 03 de junio de 2008 16:30
Para: Tomcat Users List
Asunto: Re: Requests being processed at a certain moment
I use a filter servlet to log entry/exit timestamps for requests
along with
some shell scripting to process the logs looking for "still open"
requests.
I've been using it for over a year for a production site, it's been
very
useful for debugging unexplained slowdowns, hangs, etc.
Filter is pretty simple, essentially:
public void doFilter(...) {
int request_id = ++s_request_id ;
long lStart = System.currentTimeMillis() ;
logger_.info(request_id + " processing request for '" +
sRequestedUrl +
"'") ;
try {
fc.doFilter(request, response) ;
}
finally {
logger_.info(request_id + " processed in " +
(System.currentTimeMillis()
- lStart) + " msec") ;
}
}
On Tue, Jun 3, 2008 at 10:15 AM, Álvaro Morillas (Sortes Ing. Inf.
S. L. ) <
[EMAIL PROTECTED]> wrote:
Hi everyone. This is my first post in this group. I hope this
question
hasn't been answered before.
I have a problem with my web application. It is growing and in
certain
peak
moments the server gets very busy. I work with Tomcat 5.5 and IIS.
I think
the problem is within my programming (not configuration). Because
of that
I'm trying to see what requests are being processed in a certain
moment by
Tomcat and for how long they've been there so I can tune them.
Is there any application I can use to see that? Or I have to use
the logs
and analize them in any way?
I hope there is an easy solution for my problem.
Thanks in advance.
--------------------------------------------------------
Álvaro Morillas Correa
Sortes Ingeniería Informática, S.L.
http://www.sortes.com
Pza. Mayor, 25, Of. 9-B - 28911 Leganés (Madrid)
Horario: L-J: 9:00-14:00 15:00-18:30 V: 9:00-15:00
Tfno: 91 694 33 88 Fax: 91 693 10 47
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