Hi,
Here's a mail posted by "Dr. Evil" to the Tomcat User mailing list. I've taken the
liberty to post the relavant content of his mail here.
****************** begin quote ******************
Download the log4j files, and copy the .jar files into
TOMCAT_HOME/libs, otherwise servlets can't find them.
First, compile a servlet called startlogging.java, in the classes
directory:
----------------------
// start logging functions
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.log4j.PropertyConfigurator;
public class startlogging extends HttpServlet {
public void init() throws ServletException {
PropertyConfigurator.configure("/usr/local/jakarta-tomcat-4.0/webapps/myapp/WEB-INF/classes/log4j.properties");
// or wherever your properties file is
}
}
----------------------
Then, put this in the web.xml file:
----------------------
<servlet>
<servlet-name>startlogging</servlet-name>
<servlet-class>startlogging</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
----------------------
I put it as my first servlet entry in the file. Order is important in
that file.
Then, create the log4j.properties file, in the classes directory:
----------------------
# Set root category priority to DEBUG and its only appender to A1.
log4j.rootCategory=DEBUG, A1
# A1 is set to be a ConsoleAppender.
#log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1=org.apache.log4j.FileAppender
# set up the filename - change as appropriate
log4j.appender.A1.File=/tmp/test.log
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%-4r [%t] %-5p %c %x - %m%n
----------------------
Finally, in classes that you want to log from:
----------------------
class myclass {
static Category cat = Category.getInstance(userinfo.class);
public void mymethod() {
.....
cat.info("This is an info log entry.");
----------------------
******************end quote ******************
31/10/2001 4:57:14 AM, chenghong <[EMAIL PROTECTED]> wrote:
>
>
>
> is there an example for me to refer how to use log4j ?
>
> thanks
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