com.hazelcast.internal.cluster.fd

Interface ClusterFailureDetector

All Known Implementing Classes:

DeadlineClusterFailureDetector, PhiAccrualClusterFailureDetector

public interface ClusterFailureDetector

Cluster failure detector tracks heartbeats of the members and decides liveness/availability of them.

Method Summary

Modifier and Type	Method and Description
void	heartbeat(Member member, long timestamp) Notifies this failure detector about received heartbeat message from a member.
boolean	isAlive(Member member, long timestamp) Returns true if given member is considered as alive/available.
long	lastHeartbeat(Member member) Returns the last heartbeat timestamp for a member.
void	remove(Member member) Deregister member from tracking and cleanup resources related to this member.
void	reset() Clear all state kept by this failure detector
double	suspicionLevel(Member member, long timestamp) Returns suspicion level about a given member.

Method Detail

heartbeat

void heartbeat(Member member,
               long timestamp)

Notifies this failure detector about received heartbeat message from a member.

Parameters:

member - member which heartbeat message is received from

timestamp - timestamp of heartbeat message in milliseconds

isAlive

boolean isAlive(Member member,
                long timestamp)

Returns true if given member is considered as alive/available.

Parameters:

member - member whose liveness is questioned

timestamp - timestamp in milliseconds

Returns:

true if member is alive

lastHeartbeat

long lastHeartbeat(Member member)

Returns the last heartbeat timestamp for a member.

Parameters:

member - member whose heartbeat timestamp is requested

Returns:

heartbeat timestamp in milliseconds

suspicionLevel

double suspicionLevel(Member member,
                      long timestamp)

Returns suspicion level about a given member. Returned value is mostly implementation dependent. 0 indicates no suspicion at all.

Parameters:

member - member

timestamp - timestamp in milliseconds

Returns:

suspicion level

remove

void remove(Member member)

Deregister member from tracking and cleanup resources related to this member.

Parameters:

member - member to be removed

reset

void reset()

Clear all state kept by this failure detector