MBeans for stable resources - JMX in Action - page 82

{
public PropertyManagerSetup()
{
try
{
RmiConnectorClient client = RMIClientFactory.getClient();
ObjectName propertyName = new
ObjectName( "JMXBookAgent:name=property");

client.createMBean( "jmxbook.ch4.PropertyManager",
propertyName );
}
catch( Exception e )
{
ExceptionUtil.printException( e );
}
}
public static void main( String args[] )
{
PropertyManagerSetup setup = new PropertyManagerSetup();
}
}

The setup class uses the RMIClientFactory class to acquire an RMI client with
which to contact your agent. Using the client, it invokes the createMBean()
method of the MBeanServer . When you used the HTML adapter in chapter 2, you
caused the same thing to happen by using the browser.
Before you run the setup class, make sure you have an instance of the JMX-
BookAgent running—use the following command to do so:

javac jmxbook.ch4.JMXBookAgent
After the agent successfully starts, execute the PropertyManagerSetup class to cre-
ate your PropertyManager MBean. Open your web browser to the address of the
agent's HTML adapter, and you will see the new MBean registered in the agent.
The PropertyManager and DBSource MBeans are both good examples of using
MBeans to make an application more configurable. The next section deals with
making an application componentized.

4.4.2 Breaking applications into components

Chapter 1 explains that it is possible to use JMX to break applications into man-
ageable components. Componentization is a development method that defines
interfaces between components of an application, allowing their implementa-
tions to be changed or even replaced. With Standard MBeans, you can define