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First of all, you can read this great tutorial from Christopher Blunck ( ). I will just add my comments and improvements.


1. Start your Tomcat and check that you have access to http://localhost:8080/manager/jmxproxy/.

It means that JMX is enabled on your Tomcat configuration (if not, check if the following line is in your /conf/server.xml file:
<Listener className="org.apache.catalina.mbeans.ServerLifecycleListener" />


Otherwise, check the Tomcat documentation to activate it). Let this page opened to check further if your custom


MBean is detected by Tomcat.

2. Build your custom MBean by following the Christopher Blunck's example:


In this implementation, firstly notice the ObjectName representing the MBean (in the constructor):
name = new ObjectName("Application:Name=Server,Type=Server");
Do not hesitate to change the domain name (the first parameter) by your own to easily find your MBean reference in the http://localhost:8080/manager/jmxproxy page.

Secondly, take a look at your MBean constructor:

  1. First step is to get a reference to the Tomcat's MBeanServer with MBeanServer server = getServer();.


  1. The getServer() method returns the first MBean server in the list of MBean servers registered in JVM, which is the one used by Tomcat.

In my application architecture, I placed the 2 MBeans files (the interface and its implementation) in a particular package (I don't think its compulsary but definitely more aesthetic). Compile those one in a jar archive and place it in the Tomcat's library folder (/lib).

3. Build your ContextListener: According to the Tomcat's documentation, a Listener is a a component that performs actions when specific events occur, usually Tomcat starting or Tomcat stopping.. We need to instantiate and load our MBean at Tomcat's start. So we build a file which is placed wherever you want in your project architecture:

No Format

package '''org.bonitasoft.context''';

 * @author Christophe Havard

import javax.servlet.ServletContext;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.bonitasoft.mbeans.Server;

public final class ContextListener  implements ServletContextListener {

  public void contextInitialized(ServletContextEvent event) {
    Server mbean = new Server();

  public void contextDestroyed(ServletContextEvent event) { }



Then, you have to modify your WEB-INF/web.xml file to make Tomcat execute your ContextListener.

No Format

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

  <display-name>My Web Application</display-name>
 '''''bla bla bla...'''''


5. The configuration should be over. You should have done those the following operations:

  1. Build your MBean,


  1. Compile it and place the .jar archive in the Tomcat's /lib folder,


  1. Build your,


  1. Add a reference to your ContextListener inside your WEB-INF/web.xml file

You can try to run your project. Open the http://localhost:8080/manager/jmxproxy page and find your custom MBean (with a simple ctrl+f). You can see its domain, name, type and its attributes and methods.

You can now use this MBean in your application by getting a reference to the Tomcat's MBean server:

No Format

MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
//call operations with invoke(...) and attributes with getAttributes(...)

Do not hesitate to check the ManagementFactory class javadoc.CategoryFAQ