Notifies the FailureDetector that a heartbeat arrived from the monitored resource.
Notifies the FailureDetector that a heartbeat arrived from the monitored resource. This causes the FailureDetector to update its state.
Returns true if the resource is considered to be up and healthy and returns false otherwise.
Returns true if the failure detector has received any heartbeats and started monitoring of the resource.
A failure detector must be a thread-safe mutable construct that registers heartbeat events of a resource and is able to decide the availability of that monitored resource.