Java Management Extensions (JMX) is an API that facilitates building management applications that can configure, and perform operations on, a server application. In general, each manageable component of the server application is represented by a Management Bean (or MBean, for short). JMX defines three types of MBeans, of which Model MBeans are the most flexible. Model MBeans provide a way to define MBeans for many different components, without having to write a specific MBean implementation class for each one.
However, this power comes at a price. It is necessary to set up a substantial amount of metadata about each MBean, including the attributes it should expose (similar to JavaBeans properties), the operations it should make available (similar to calling methods of a Java object via reflection), and other related information. The Modeler component is designed to make this process fairly painless -- the required metadata is configured from an XML description of each Model MBean to be supported. In addition, Modeler provides a factory mechanism to create the actual Model MBean instances themselves.
For further information, see the package description for the Modeler package.
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The JavaDoc API documents are available online.