Advanced queueing: How to detect disconnect/database down if using callback

Question

In my last thread here, I was able to create a callback mechanism for fetching messages posted to the AQ-queue. This means I can get rid of the loop that polls for messages, that we had earlier.
In the loop I could detect network problems, because the Dequeue function would throw an exception. When I have a callback, no exception is thrown, since I do not try to dequeue before I know there is a message there.
How can I handle detection of network problems/database problems when using callback? If not handled, the program thinks no mesages is sent, while actually the network might be down...
I'm not to keen on looping and polling to check for network status, as the whole point of callback was to avoid this :)
Regards,
Sverre

Answer 1

update: I've tried to use both the OCI and OCCI failover callback, but it is not called when e.g. the network cable is disconnected.
Is there any way to get occi to notify me when there is something wrong with the connection? Right now my callback is never called again, if the network is disconnected and reconnected...
Anyone?