It looks like it should work, although it is bad form to use a servlet
init rather than a servlet context listener as well as using
getRealPath("/"). Avoid unnecessary File IO in webapps.
You could set log4j.debug=true in the properties file. Also, you could
do a System.out.println() to test whether the path the code came up with
is really valid.
Jake
Troy Davis wrote:
Hello,
I sent this message last week, but haven't seen any responses. Would
anyone please point me in the right direction?
Thank You,
Troy
---
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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