> I think we have to put much more effort into the definition of the 
> hierarchy life cycle. The current definition of 
> HierarchyEvent is patently 
> lacking. We can either add methods to HierarchyEvent or 
> alternatively add 
> new event types. The Monitoring API of JMX is also worth a look.

Either way is going to require changes to the HierarchyEventListener.  I
would tend towards a HierarchyEvent with a single event reporting method in
the listener interface (or at least a small number of generic methods).
That way we can add more event types/ids in the future if we need to,
without affecting the signature of the listener interface.  If a listener
implementation gets an event type/id that it does not recognize, it can
ignore it.

I'll look at it some more and make a proposal.  I want to get this
moving...so I can get the plugins done...so I can get the
receivers/watchdogs done...etc.  Too many dependencies.

-Mark

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