Getting server address and application name

Environment: NetBeans 6.9.1, GlassFish 3.1

I have a Java Web Application. How to get the server address and the application name dynamically? The '2in1' solution would be the best for me: http://localhost:8080/AppName/.

Is there a practical way to get that information?

Let's say the value of AppName will be fixed, so I only need the host address. Is it possible to retrieve it via JMX? Any other ways?