We are using option 3:
calling configure with location of log4j config file + application specific
properties
It's working great.
All our webapps are using the same log4j config file, but they're logging to
different files: the config file has placeholders that are resolved via the
application specific properties (resolved at runtime, eg webapp name)
Using System properties doesn't work because on tomcat system properties are
shared between webapps.
regards,
Maarten
On 10/24/07, James A. N. Stauffer <[EMAIL PROTECTED]> wrote:
>
> Options (roughly decreasing recommendations):
> 1. Move to a share location like tomcat/common/classes
> 2. Set a system property to give the path to log4j.properties (I
> forgot the name)
> 3. Explicitly call configure.
>
> On 10/24/07, Troy Davis <[EMAIL PROTECTED]> wrote:
> > Hello,
> >
> > I've been trying to get log4j to load my properties file from
> > somewhere other than WEB-INF/classes, mostly because eclipse clears
> > out this directory when I choose Project -> Clean. I've tried a few
> > different approaches that I found online, including this:
> >
> > (inside web-app block of web.xml):
> >
> > <servlet>
> > <servlet-name>log4j-init</servlet-name>
> > <servlet-class>com.m4.Log4jInit</servlet-class>
> > <init-param>
> > <param-name>log4j-init-file</param-name>
> > <param-value>WEB-INF/log4j.properties</param-value>
> > </init-param>
> > <load-on-startup>1</load-on-startup>
> > </servlet>
> >
> >
> > (full text of Log4jInit.java, compiled and included in a jar in WEB-
> > INF/lib):
> >
> > package com.m4;
> > import org.apache.log4j.PropertyConfigurator;
> > import javax.servlet.http.HttpServlet;
> > import javax.servlet.http.HttpServletRequest;
> > import javax.servlet.http.HttpServletResponse;
> > import java.io.PrintWriter;
> > import java.io.IOException;
> > public class Log4jInit extends HttpServlet {
> > private static final long serialVersionUID = -5104057715092254401L;
> > public void init() {
> > String prefix = getServletContext().getRealPath("/");
> > String file = getInitParameter("log4j-init-file");
> > System.out.println("Initializing log4j with " + prefix + file);
> > // if the log4j-init-file is not set, then no point in trying
> > if(file != null) {
> > PropertyConfigurator.configure(prefix+file);
> > }
> > }
> > public void doGet(HttpServletRequest req, HttpServletResponse res) {
> > // Nothing happening here yet.
> > }
> > }
> >
> > I can see the debug line go by when init() is called in Log4jInit,
> > but I still get an error saying that log4j is not configured properly.
> >
> > What is the recommended way to load this file from some other location?
> >
> > Thank You,
> > Troy
> >
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> >
> >
>
>
> --
> James A. N. Stauffer http://www.geocities.com/stauffer_james/
> Are you good? Take the test at http://www.livingwaters.com/good/
>
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>
