Hi Guys,
I'm trying to use log4j to write to a file for my Java web application.
Based on what I've read, I have the following setup:
My web.xml file contains the following:
<servlet>
<servlet-name>log4j-init</servlet-name>
<servlet-class>com.tacticalenterprisesltd.Log4jInit</servlet-class>
<init-param>
<param-name>log4j-init-file</param-name>
<param-value>WEB-INF\properties\log4j_FILE.properties</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>log4j-init</servlet-name>
<url-pattern>/log4j-init/*</url-pattern>
</servlet-mapping>
My servlet Log4jInit looks like this:
01.package com.tacticalenterprisesltd;
02.
03.import org.apache.log4j.PropertyConfigurator;
04.import javax.servlet.http.*;
05.
06.
07.public class Log4jInit extends HttpServlet
08.{
09. public void init()
10. {
11. try{
12. String prefix = getServletContext().getRealPath("/");
13. String file = getInitParameter("log4j-init-file");
14. if(file != null)
15. {
16. System.out.println("Log4jInit.init - prefix + file: " + prefix
+ file);
17. PropertyConfigurator.configure(prefix + file);
18. }
19. }
20. catch(Exception e){e.printStackTrace();}
21. }
22.
23. public void doGet(HttpServletRequest req, HttpServletResponse res){}
24.}
My properties file looks like this:
# Define the root logger with appender file
log4j.rootLogger = DEBUG, FILE
# Define the file appender
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
# Set the name of the file
log4j.appender.FILE.File=C:\\logs\\myLog.txt
# Set the immediate flush to true (default)
log4j.appender.FILE.ImmediateFlush=true
# Set the threshold to debug mode
log4j.appender.FILE.Threshold=debug
# Set the append to false, should not overwrite
log4j.appender.FILE.Append=true
# Set the maximum file size before rollover
log4j.appender.FILE.MaxFileSize=5KB
# Set the the backup index
log4j.appender.FILE.MaxBackupIndex=2
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n
As you can see, I'm telling log4j to write to a file at C:\logs\myLog.txt
Pretty straight forward right. Well, it doesn't seem to think so since it
isn't writing to the file at all. I have another properties file which tells
log4j to print to the console. It doesn't seem to have a problem with that
one. Could someone please advise as to what might be going wrong. Any help
will be appreciated.
Alan
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