ContextLogger.java Source code

Introduction

Here is the source code for ContextLogger.java

Source

//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));

    }

}