void hubHeartbeat ( UpdateServerHeartbeat updateServer , UpdateRackHeartbeat updateRack , UpdatePodSystem updatePod , long sequence ) { if ( startUpdate ( updateRack , updatePod ) ) { getHeartbeat ( ) . hubHeartbeat ( updateServer , updateRack , updatePod , sequence ) ; } }
Sends a hub heartbeat message if the update has changed or it s time for a periodic heartbeat .