Hi,
You must initialize the log4j system (as the error says). This means you
must have a class of yourself, which is called before you create the first
instance of a category. This class should do something like this:
String log4jConfigFileName = "log4j.properties";
try {
// do the first initialization of the file
PropertyConfigurator.configure(log4jConfigFileName);
// now set a listener for the properties file so if they are
changed, the log4j will reload it.
// we are using the default wait time set by log4j.
PropertyConfigurator.configureAndWatch(log4jConfigFile);
}
catch (Exception ex ) {
// log4j config file not found. just print a message to standard
error.
System.err.println("Can't initialize the log4j. Error reported
by log4j: " + ex.getMessage());
}
The file log4j.properties should be in your classpath, or you should give a
name which is a full path to this file.
To have a single point of initialization, we created a factory class for the
log4j categories, which is a singleton. You can use it with some small
modifications:
package your.package.name;
import org.apache.log4j.*;
public class Log4jCategoryFactory {
private static Log4jCategoryFactory _singleton = new
Log4jCategoryFactory();
/**
* internal constructor that is used to create a singelton private
object instance.
*/
private Log4jCategoryFactory() {
initLogSystem();
}
/**
* init the log system. This will init the log4j and will set the paths
to the log files
*/
private void initLogSystem(){
String log4jConfigFile = "log4j.properties";
try {
// do the first initialization of the file
PropertyConfigurator.configure(log4jConfigFile);
// now set a listener for the properties file so if they are
changed, the log4j will reload it.
// we are using the default wait time set by log4j.
PropertyConfigurator.configureAndWatch(log4jConfigFile);
}
catch (Exception ex ) {
// log4j config file not found. just print a message to standard
error.
System.err.println("Can't initialize the log4j. Error reported
by log4j: " + ex.getMessage());
}
}
/**
* get a category instance for a given object. Note that this is kind of
havy operation. You better use
* the Class version to do this.
* @param loggedObject the object you are looking for it's category
* @return a log4j Category instance
* @see #getInstance(java.lang.Class)
*/
public static Category getInstance( Object loggedObject ) {
return Category.getInstance(loggedObject.getClass().getName());
}
/**
* get a category instance for a given category name
* @param categoryName the category you are looking for
* @return a log4j Category instance
*/
public static Category getInstance( String categoryName ) {
return Category.getInstance(categoryName);
}
/**
* get a category instance for a given category name
* @param categoryClass the class to look for it's category
* @return a log4j Category instance
*/
public static Category getInstance( Class categoryClass ) {
return Category.getInstance(categoryClass);
}
}
good luck.
Shay.
-----Original Message-----
From: Ram, Kumar [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, September 05, 2001 8:46 AM
To: '[EMAIL PROTECTED]'
Subject: Configuring tomcat with soap and log4j
Hi,
I am trying to configure log4j with tomcat and soap. The
log4j.properties file is in my C:\soap-2.1\webapps\soap\WEB-INF\classes as
stated in the manual.html file that comes with the package. I have tomcat
installed in C:\jakarta-tomcat-3.2.1The soap service works properly and
gives the correct result. However i get the following error.
log4j:ERROR No appenders could be found for category
(samples.test.SampleUserCheck).
log4j:ERROR Please initialize the log4j system properly.
Is there anything i am missing or doing wrong ? I have tested log4j with
other java applications which work fine alone. However i am not able to get
it running with tomcat.
Ram
