This presentation will cover the Java Management Extensions (JMX) specification, and provide a short tutorial on how to create managed JMX components, or MBeans. The architecture of JMX will be discussed, including the notions of adaptors, MBeans, agents, notifications, etc. We will see how components can be plugged into a JMX agent and work together with other MBeans, and how to access them. The adaptor concept allow for multiple ways to remotely administer an JMX agent, and we will look at a few possible adaptors and the services they provide. We will look at the various types of MBeans, and how they are constructed. We will look at standard MBeans, dynamic MBeans, and model MBeans. Then, I will show how to create a simple MBean, and how to install it into the JMX server. Finally, we will take a brief look at how JMX is used in the JBoss application server. We will see how JMX component configuration is done, and how JBoss has introduced a custom interface to allow runtime management of services.