Disabling attributes or operations using StandardMBean

Question

In the Best Practices document at http://java.sun.com/javase/technologies/core/mntr-mgmt/javamanagement/best-practices.jsp I find the following advice:
If you need some particular abilities of Dynamic MBeans, for example the ability to supply descriptions for the attributes or operations, or the ability to disable certain attributes or operations, then you should consider subclassing javax.management.StandardMBean rather than implementing the DynamicMBean interface.
I'm trying to learn about the various types of MBeans. Are there any details available on how to disable certain attributes or operations using a subclass of StandardMBean, and does anyone have a good use case for this feature?
Thanks...

Answer 1

Hi,
Disabling attributes and operation is not something I would recommend, but if
you need to do it it should be relatively easy to use javax.management.StandardMBean
for that.
For instance if you want to disable invoke for a given MBean, you could
write a subclass of StandardMBean and override its invoke method to do something
like:
@Override
public Object invoke(String methodName, Object[] params, String signature)
           throws ... {
   // disable method whatever
   if (methodName.equals("whatever"))
      throw UnsupportedOperationException("method whatever is disabled");
   // allows other methods
   return super.invoke(methodName,params,signature);
}For background reading see:
javax.management.StandardMBean: When and Why.
http://blogs.sun.com/jmxetc/entry/javax_management_standardmbean_when_and
-- daniel
http://blogs.sun.com/jmxetc