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Java Management Extensions
book

Java Management Extensions

by J. Steven Perry
June 2002
Intermediate to advanced
312 pages
9h 18m
English
O'Reilly Media, Inc.
Content preview from Java Management Extensions

Instrumenting Resources as Model MBeans

In this chapter, we have seen how to create Descriptor objects and the necessary metadata classes for a model MBean, and we have looked at RequiredModelMBean and the interfaces that it must implement. In this section, we will see how to tie all of this information together to instrument resources as model MBeans.

The steps you must go through to instrument each of your resources as model MBeans are:

  1. Create an instance of the resource to be managed.

  2. Create an instance of RequiredModelMBean.

  3. Create the necessary metadata classes and optional descriptors for the features of the management interface.

  4. Create the metadata for the resource (i.e., the ModelMBeanInfo object).

  5. Set the metadata of RequiredModelMBean to the metadata for the resource (from Step 3) and the resource to be managed through the ModelMBean interface.

As in the previous chapters, we will use the sample application for all of our examples. This will allow you to compare and contrast the other MBean types with model MBeans.

In the examples presented here we will look at the application class Controller, which acts as the JMX agent. For the example code in this chapter, the Controller class is responsible for creating the resources to be managed, instrumenting them as model MBeans, and registering them with the MBean server.

The first two steps are to create an instance of the managed resource (in this example, the Queue) and to create the RequiredModelMBean instance:

// . . . ...
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Publisher Resources

ISBN: 0596002459Catalog PageErrata