Question

I have several web applications that are deployed as .war files on a Tomcat server. Each web application has an ApplicationListener.java class which implements ServletContextListener. Within the ApplicationListener.java classes, I use ScheduledExecutorService to spawn a single thread which is used to consume messages from a queue:

@Override
public void contextInitialized(ServletContextEvent event) {

    ReferenceData.init();

    scheduler = Executors.newSingleThreadScheduledExecutor();
    scheduler.scheduleAtFixedRate(new ScheduledConsumer(), 0, ReferenceData.CONSUME_INTERVAL, TimeUnit.MILLISECONDS);

}

Here is my question: Is it possible to create an additional web application that can “talk” with all of the others? I essentially want to create a dashboard that will let me display the current ReferenceData.CONSUME_INTERVAL values (used in the code above) for each web application, as well as the ability to update their values.

Is this possible? I would appreciate any design recommendations, details, or examples.

Thanks!

Answer 1

This is a kind of configuration, right?

Well you could create one JMX-Beans in each of your application(slave), and a new Application that proxy all those JMX-Beans(master). Those JMX-Slaves register/unregister themselves to JMX-Master.

Now you got some Points:

• implemented User-Interfaces in the Manager-App of tomcat.
• implemented security-roles.
• implemented persistence of JMX-Master-Configuration.

(The JMX-Master may be solved in a one-class-app)