How to get a reference to a MBean ?

[monocongo]

I have a MBean which I want to access in other classes. I assume that I should get a reference to this MBean via a JNDI lookup. If this is true then what name should I use for the lookup ? Do I need to bind the MBean to a name in the MBean's constructor or start() method, and then use this name for the lookups ? Or can I use the name specified in the mbean element for the MBean (found in the jboss-service.xml of the MBean's SAR) ?

Thanks in advance for any information.


--James

[nickman]

You do not need a reference to the MBean. You simply need a reference to the JMX agent (MBeanServer). You can then invoke calls to the MBean through the agent.

Get the MBeanServer like this:

MBeanServer mbeanServer = (MBeanServer) MBeanServerFactory.findMBeanServer(null).
 iterator().next();

Create an ObjectName for your MBean like this:

ObjectName objectName = new ObjectName("<mydomain>:<myname>");

e.g.

ObjectName objectName = new ObjectName("com.example:service=myservice");

Check the JMX Console for the name of your MBean.

Then, invoke methods against your mbean as follows:

mbeanServer.invoke(objectName,
 "<method name>",
 new Object[]{<array of object params>},
 new String[]{<array of class types of objects>}
 );

Consult the javax.management JavaDoc for more details.

//Nicholas