com.netflix.fenzo

Class DefaultFitnessCalculator

java.lang.Object

com.netflix.fenzo.DefaultFitnessCalculator

All Implemented Interfaces:

VMTaskFitnessCalculator

public class DefaultFitnessCalculator
extends java.lang.Object
implements VMTaskFitnessCalculator

A default fitness calculator that always finds any target to be perfectly fit for any task. A fitness calculator computes * a value between 0.0 and 1.0 to indicate the confidence with which it believes a particular target is suitable for a particular task, with 0.0 signifying that it is completely unconfident, and 1.0 signifying that it is completely confident. This default fitness calculator always computes this value to be 1.0, meaning that it always believes a target and a task are well matched for each other.

Constructor Summary

Constructors

Constructor and Description
DefaultFitnessCalculator()

Method Summary

Modifier and Type	Method and Description
double	calculateFitness(TaskRequest taskRequest, VirtualMachineCurrentState targetVM, TaskTrackerState taskTrackerState) Computes the suitability of targetVM to take on the task described by taskRequest to be 1.0 (fully suitable).
java.lang.String	getName() Returns the name of this fitness calculator (the class name).

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultFitnessCalculator

public DefaultFitnessCalculator()

Method Detail

getName

public java.lang.String getName()

Returns the name of this fitness calculator (the class name).

Specified by:

getName in interface VMTaskFitnessCalculator

Returns:

the name of this fitness calculator

calculateFitness

public double calculateFitness(TaskRequest taskRequest,
                               VirtualMachineCurrentState targetVM,
                               TaskTrackerState taskTrackerState)

Computes the suitability of targetVM to take on the task described by taskRequest to be 1.0 (fully suitable).

Specified by:

calculateFitness in interface VMTaskFitnessCalculator

Parameters:

taskRequest - a description of the task to be assigned

targetVM - a description of the host to which the task may potentially be assigned

taskTrackerState - the state of tasks and task assignments in the system at large

Returns:

1.0