CounterMonitors with offset and modulus

Can someone please clarify the operation of CounterMonitors for me when 
they have offset, threshold and modulus?

I have a counter with an initThreshold of 1, an offset of 1 and a 
modulus of 5, running in counter mode (not differencing). Over time it 
has reached a state where the current value is 4 and the threshhold has 
bumped to 5.

If I then set the observed attribute to the value 5, a notification is 
generated (cool) and in JDK1.5 the threshold is raised to 6. If I then 
set it to 6, I get another value and the threshold is raised to 7.

How can the value of the threshold be greater than the modulus? I would 
have expected it to be reset to the initial value 1 (which is what MX4J 
does) as the spec says "The threshold will then also “roll over” 
whenever it strictly exceeds the modulus value."

Are we meant to detect counter "roll-over" by looking for a decrease in 
value and only apply the modulus then (although I couldn't see anyhting 
about that in the spec)?

Thanks
--
Jeremy


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