org.apache.flink.runtime.heartbeat

Interface HeartbeatManager<I,O>

Type Parameters:

I - Type of the incoming payload

O - Type of the outgoing payload

All Superinterfaces:

HeartbeatTarget<I>

All Known Implementing Classes:

NoOpHeartbeatManager

public interface HeartbeatManager<I,O>
extends HeartbeatTarget<I>

A heartbeat manager has to be able to start/stop monitoring a HeartbeatTarget, and report heartbeat timeouts for this target.

Method Summary

Modifier and Type	Method and Description
long	getLastHeartbeatFrom(ResourceID resourceId) Returns the last received heartbeat from the given target.
void	monitorTarget(ResourceID resourceID, HeartbeatTarget<O> heartbeatTarget) Start monitoring a HeartbeatTarget.
void	stop() Stops the heartbeat manager.
void	unmonitorTarget(ResourceID resourceID) Stops monitoring the heartbeat target with the associated resource ID.

Methods inherited from interface org.apache.flink.runtime.heartbeat.HeartbeatTarget

receiveHeartbeat, requestHeartbeat

Method Detail

monitorTarget

void monitorTarget(ResourceID resourceID,
                   HeartbeatTarget<O> heartbeatTarget)

Start monitoring a HeartbeatTarget. Heartbeat timeouts for this target are reported to the HeartbeatListener associated with this heartbeat manager.

Parameters:

resourceID - Resource ID identifying the heartbeat target

heartbeatTarget - Interface to send heartbeat requests and responses to the heartbeat target

unmonitorTarget

void unmonitorTarget(ResourceID resourceID)

Stops monitoring the heartbeat target with the associated resource ID.

Parameters:

resourceID - Resource ID of the heartbeat target which shall no longer be monitored

stop

void stop()

Stops the heartbeat manager.

getLastHeartbeatFrom

long getLastHeartbeatFrom(ResourceID resourceId)

Returns the last received heartbeat from the given target.

Parameters:

resourceId - for which to return the last heartbeat

Returns:

Last heartbeat received from the given target or -1 if the target is not being monitored.