Log4j xml

L · **Joined:** Tue Feb 19, 2008 12:08 pm **Posts:** 3

Are there any examples on how to config log4j xml file for logging. have seen examples using properties file.

kochcp · **Posted:** Tue Feb 19, 2008 12:33 pm

probably in the log4j documentation

jsimas · **Joined:** Tue Feb 19, 2008 6:48 am **Posts:** 17

Use this example:

Code:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
        
  <appender name="ConsoleAppender" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.SimpleLayout"/>
  </appender>

  <root>
    <priority value ="debug" />
    <appender-ref ref="ConsoleAppender"/>
  </root>

</log4j:configuration> 

For more information, use log4j documentation or see the folowing wiki http://wiki.apache.org/logging-log4j/Log4jXmlFormat

L · **Joined:** Tue Feb 19, 2008 12:08 pm **Posts:** 3

Perhaps more clarity needed. I'm getting the following:

log4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.

I have not seen any examples in xml form in the documentation or the "Java Persistence with Hibernate" book.

jsimas · **Joined:** Tue Feb 19, 2008 6:48 am **Posts:** 17

You have no initialize log4j.

In web.xml add:

Code:

   <context-param>
      <param-name>log4jConfigLocation</param-name>
      <param-value>/WEB-INF/classes/conf/log4j.xml</param-value>
   </context-param>

you may have to change the value /WEB-INF/classes/conf/log4j.xml.

and then add:

Code:

   <listener>
      <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
   </listener>

And the log4j should be initialized correctly.

L · **Joined:** Tue Feb 19, 2008 12:08 pm **Posts:** 3

I have to introduce spring listener into the equation. I'd think there would eb another way.

jsimas · **Joined:** Tue Feb 19, 2008 6:48 am **Posts:** 17

The other way is to build a listener that initiliaze Log4j:

Code:

public class Log4jInitializer implements ServletContextListener {

   public void contextInitialized(ServletContextEvent arg0) {
      PropertyConfigurator.configure("log4j.xml");
   }
   
   public void contextDestroyed(ServletContextEvent arg0) {
   }

}