Registering a Bean within JMX (at least in JBoss) is very straightforward. It requires an interface with attributes (getters and setters) and operations.

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MBeanServer server = org.jboss.mx.util.MBeanServerLocator.locateJBoss();
ObjectName objectName = new ObjectName("jboss.cache:service=TcpCacheServer");
server.registerMBean(objectToAttach, objectName);

objectToAttach is an object with a JMX'able interface.