In the context of heartbeat message detection, I would like to detect when these heartbeats stop.
I would like to publish a message saying the count=0 for systemY with the understanding that it was absent for the last 10 second sampling rate.
I know how to sample the count for an interval of 10s, but the problem is that if the count=0, you have no events to work with. So it needs to be correlated to an outer query based on the heartbeat. Any help would be appreciated.
Thanks for the suggestion, the problem is that I need the event to be emitted when the count=0. With the above solution, it means that the event will be emitted only when the count is 1. When count = 0, it means there are no events for that heartbeat type and the event will disappear, leaving the user thinking that the heartbeat drop off has ended. I think it needs to be correlated against a greater time span, where the event does exist.