detect cluster failure?

[Jonathan Duty]

Hello,
I would like to use active cluster to manage a cluster of distributed  
servers.   I will run a broker in one location that these servers  
will connect to and run active cluster on top of.   After playing  
around with this I have it working.  Except, if I bring down the  
broker, the servers never get an event to let me know that the  
cluster is down.  Is there a way I can tap into the cluster or  
activemq connection to notice when it goes down?

Thanks in advance,
~Jonathan