I am trying to configure log4j2 in my webapplication by following some tutorials. I am working with glassfish 4.1.1 server and servlet version 3.1. I am able to configure the logging feature with the below configuration:
log4j.properties
# Root logger option
log4j.rootLogger=INFO, consoleAppender, fileAppender
# debug level logger
log4j.logger.kumar.suraj.college.administration.login=DEBUG
# Redirect log messages to console
log4j.appender.consoleAppender=org.apache.log4j.ConsoleAppender
log4j.appender.consoleAppender.Target=System.out
log4j.appender.consoleAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.consoleAppender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
# Redirect log messages to a log file, support file rolling.
log4j.appender.fileAppender=org.apache.log4j.DailyRollingFileAppender
log4j.appender.fileAppender.File=E:\\DEVELOPMENT\\JAVA\\web-logs\\web-college-administration\\applicationLogs.log
log4j.appender.fileAppender.layout=org.apache.log4j.PatternLayout
log4j.appender.fileAppender.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
the properties file is placed in src/main/resources folder
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>College Administration</display-name>
<!-- <context-param>
<param-name>log4jConfiguration</param-name>
<param-value>/log4j.properties</param-value>
</context-param>is it required
-->
<!--from where is this class referenced in dependency without web -->
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
</listener>
<servlet>
<servlet-name>loginServlet</servlet-name>
<servlet-class>kumar.suraj.college.administration.login.LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>loginServlet</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>
</web-app>
the context param that defines file location is commented out. probably log4j looks by default for a file with name log4j.properties. However just wanted to know if its the right way to specify the file location.
Also I am not sure from which jar is org.apache.logging.log4j.web.Log4jServletContextListener being referenced. I searched all jar files but could not locate this class.
LoginServlet.java
package kumar.suraj.college.administration.login;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import kumar.suraj.college.administration.adduser.AddUserServlet;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
// final static Logger logger = LogManager.getLogger(LoginServlet.class);
final static Logger logger = Logger.getLogger(LoginServlet.class);
public LoginServlet() {
super();
}
@Override
protected void doGet(final HttpServletRequest request, final HttpServletResponse response)
throws ServletException, IOException {
LoginServlet.logger.debug("debug level logging supported"); response.getWriter().append("Servedat:").append(request.getContextPath());
response.getWriter().append("Hello Suraj");
}
@Override
protected void doPost(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException {
LoginServlet.logger.debug("debug level logging supported");
this.doGet(request, response);
}
}
pom.xml dependency for log4j
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
All this works fine and I get logs in both console as well as file. But when I try to change the configuration as per the following links :
https://logging.apache.org/log4j/2.x/manual/webapp.html#Servlet-3.0 https://logging.apache.org/log4j/2.x/maven-artifacts.html
Like instead of dependency specified earlier I switch to
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-web</artifactId>
<version>2.6.2</version>
</dependency>
log4j-api and log4j-core are added as transitive dependencies with log4j-web.jar
other changes I made in LoginServlet.java is because of the compile time error I was getting after switching to log4j-web.jar which is as below :
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
public class LoginServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
final static Logger logger = LogManager.getLogger(LoginServlet.class);
// final static Logger logger = Logger.getLogger(LoginServlet.class);
the main changes are in the initialization of logger variable and the two imports. rest all configuration remained as it is. Also i was able to locate the listener class specified in web.xml in log4j-web.jar in this case. Still logging is not working with this configuartion.
Could some one please help me with it or tell me what I am doing wrong here ?
