From ###@###.###:

I think this chapter could benefit from some clarification.
http://java.sun.com/docs/books/tutorial/jmx/notifs/index.html

The first paragraph says:

" To generate notifications, an MBean must implement the
  interface NotificationEmitter or extend
  NotificationBroadcasterSupport. To send a notification,
  you need to construct an instance of the class
  javax.management.Notification or a subclass (such as
  AttributeChangedNotification), and pass the instance
  to NotificationBroadcasterSupport.sendNotification.
"

This might be confusing to naive readers. And with the exposure that
JMX gets these days we do have more and more naive readers.

The confusing sentence is "and pass the instance
to NotificationBroadcasterSupport.sendNotification."

If you simply implement NotificationEmitter, without forwarding
all calls to add/remove NL to a wrapped NotificationBroadcasterSupport,
then simply do
   'new NotificationBroadcasterSupport().sendNotification()'
to send your notification, it will not work.

I think that this chapter should either explain how to implement
the NotificationEmitter interface when not extending
NotificationBroadcasterSupport, or link to some other doc that
will explain it (e.g. point to an example like jmx-scandir).