Hello;
what is a "queue server's topic"
http://en.wikipedia.org/wiki/Java_Message_Service
http://en.wikipedia.org/wiki/Observer_pattern
It is a mechanism by which a "message" (in my case, JSON-RPC over
messaging) can be passed from either one instance to another instance
(queue) or from one instance to the other instances in the deployment
(topic).
What message?
Through this mechanism, the instances are able to periodically inform
each other of their presence. An admin user can then opt (via a user
interface) to send a message over the topic to trigger a shutdown
procedure of one or more instances.
If you implemented such an arrangement, you could have your external
system programatically send such a message into a topic and signal the
instances to shutdown.
cheers.
___
Andrew Lindesay
www.lindesay.co.nz
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