Package org.onosproject.store.cluster.impl

Class PhiAccrualFailureDetector

java.lang.Object

org.onosproject.store.cluster.impl.PhiAccrualFailureDetector

public class PhiAccrualFailureDetector
extends Object

Phi Accrual failure detector.

Based on a paper titled: "The φ Accrual Failure Detector" by Hayashibara, et al.

Constructor Summary

Constructors

Constructor	Description
PhiAccrualFailureDetector()
PhiAccrualFailureDetector(int minSamples, long minStandardDeviationMillis)
PhiAccrualFailureDetector(long minStandardDeviationMillis)

Method Summary

Modifier and Type	Method	Description
long	getLastHeartbeatTime(org.onosproject.cluster.NodeId nodeId)	Returns the last heartbeat time for the given node.
double	phi(org.onosproject.cluster.NodeId nodeId)	Compute phi for the specified node id.
void	report(org.onosproject.cluster.NodeId nodeId)	Report a new heart beat for the specified node id.
void	report(org.onosproject.cluster.NodeId nodeId, long arrivalTime)	Report a new heart beat for the specified node id.
void	reset(org.onosproject.cluster.NodeId nodeId)	Resets the failure detector for the given node.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PhiAccrualFailureDetector

public PhiAccrualFailureDetector()

PhiAccrualFailureDetector

public PhiAccrualFailureDetector(long minStandardDeviationMillis)

PhiAccrualFailureDetector

public PhiAccrualFailureDetector(int minSamples,
                                 long minStandardDeviationMillis)

Method Detail

getLastHeartbeatTime

public long getLastHeartbeatTime(org.onosproject.cluster.NodeId nodeId)

Returns the last heartbeat time for the given node.

Parameters:

nodeId - the node identifier

Returns:

the last heartbeat time for the given node

report

public void report(org.onosproject.cluster.NodeId nodeId)

Report a new heart beat for the specified node id.

Parameters:

nodeId - node id

report

public void report(org.onosproject.cluster.NodeId nodeId,
                   long arrivalTime)

Report a new heart beat for the specified node id.

Parameters:

nodeId - node id

arrivalTime - arrival time

reset

public void reset(org.onosproject.cluster.NodeId nodeId)

Resets the failure detector for the given node.

Parameters:

nodeId - node identifier for the node for which to reset the failure detector

phi

public double phi(org.onosproject.cluster.NodeId nodeId)

Compute phi for the specified node id.

Parameters:

nodeId - node id

Returns:

phi value