java code for Context logger

//Log4j from Apache is required

import org.apache.log4j.Logger;
import org.apache.log4j.PropertyConfigurator;

import javax.servlet.*;
import javax.servlet.http.*;

public class ContextLogger implements ServletContextListener {

private Logger log;

public ContextLogger() {
}

public void contextDestroyed(ServletContextEvent sce) {

String name = sce.getServletContext().getServletContextName();

//log request of the INFO level
log.info("ServletContext shut down: " + (name == null ? "" : name));

}

public void contextInitialized(ServletContextEvent sce) {

ServletContext context = sce.getServletContext();

String realPath = context.getRealPath("/");
String fileSep = System.getProperty("file.separator");

if (realPath != null && (!realPath.endsWith(fileSep)))
realPath = realPath + fileSep;
//Initialize logger here:
PropertyConfigurator.configure(realPath + "WEB-INF/classes/"
+ context.getInitParameter("logger-config"));
log = Logger.getLogger(ContextLogger.class);

String name = context.getServletContextName();
//log request about servlet context being initialized
log.info("ServletContext ready: " + (name == null ? "" : name));

}

}