io.atomix.protocols.phi

Class PhiAccrualFailureDetector

java.lang.Object

io.atomix.protocols.phi.PhiAccrualFailureDetector

public class PhiAccrualFailureDetector
extends Object

Phi Accrual failure detector.

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

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	PhiAccrualFailureDetector.Builder Phi accrual failure detector builder.

Constructor Summary

Constructors

Constructor and Description
PhiAccrualFailureDetector() Creates a new failure detector with the default configuration.
PhiAccrualFailureDetector(int minSamples, double phiFactor) Creates a new failure detector.
PhiAccrualFailureDetector(int minSamples, double phiFactor, int windowSize) Creates a new failure detector.

Method Summary

Modifier and Type	Method and Description
static PhiAccrualFailureDetector.Builder	newBuilder() Returns a new failure detector builder.
double	phi() Compute phi for the specified node id.
void	report() Report a new heart beat for the specified node id.
void	report(long arrivalTime) Report a new heart beat for the specified node id.

Methods inherited from class java.lang.Object

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

Constructor Detail

PhiAccrualFailureDetector

public PhiAccrualFailureDetector()

Creates a new failure detector with the default configuration.

PhiAccrualFailureDetector

public PhiAccrualFailureDetector(int minSamples,
                                 double phiFactor)

Creates a new failure detector.

Parameters:

minSamples - the minimum number of samples required to compute phi

phiFactor - the phi factor

PhiAccrualFailureDetector

public PhiAccrualFailureDetector(int minSamples,
                                 double phiFactor,
                                 int windowSize)

Creates a new failure detector.

Parameters:

minSamples - the minimum number of samples required to compute phi

phiFactor - the phi factor

windowSize - the phi accrual window size

Method Detail

newBuilder

public static PhiAccrualFailureDetector.Builder newBuilder()

Returns a new failure detector builder.

Returns:

a new failure detector builder

report

public void report()

Report a new heart beat for the specified node id.

report

public void report(long arrivalTime)

Report a new heart beat for the specified node id.

Parameters:

arrivalTime - arrival time

phi

public double phi()

Compute phi for the specified node id.

Returns:

phi value