Class OptionalOperatorTuningScheme

java.lang.Object

com.dna.jopt.framework.body.scheme.AbstractOptimizationScheme

com.dna.jopt.framework.body.scheme.OptionalOperatorTuningScheme

All Implemented Interfaces:

IOptimizationScheme

public class OptionalOperatorTuningScheme
extends AbstractOptimizationScheme

The Class OptionalOperatorTuningScheme.

Defining the behavior of the tuner:

For testing purpose the tuner can be disabled via the boolean doOperatorTuning. A property tune can also carry the ability to deactivate operators completely in case a certain operator was not able to generate any cost improvement during the optimization run.

private boolean doOperatorTuning = true;
private boolean hasLicense2Kill = true;

Bound probability values. Probability values for the operators need to be within bounds.

double minValue = 1.0;
double maxValue = 100.0;

A score is defined partially by the number of beneficial calls and partially by the average cost reduction per call. A weightageForCost of 0.9 means 90% of the new probability is based on the cost reduction value.

double weightageForCost = 0.9;

When we assign new probability score we smooth it with the old score. For example a weightageForOldProbability of 0.3 means we take 30% of the old value and 70% of the new value

double weightageForOldProbability = 0.8;

Building the OperatorProbabilityTunerPropertyItem:

OperatorProbabilityTunerPropertyItem tunigProps = OperatorProbabilityTunerPropertyItem.builder()
.minProbabilityValue(minValue)
.maxProbabilityValue(maxValue)
.tuningWeightageForCost(weightageForCost)
.probabilityWeightageForPrevoius(weightageForOldProbability)
.canDeactivateOperators(hasLicense2Kill)
.inDebug(true)
.build();

Invoke scheme with IOptimization.setOptimizationScheme(IOptimizationScheme):

optimization.setOptimizationScheme( new OptionalOperatorTuningScheme(optimization, doOperatorTuning, tunigProps));

Since:

Oct 1, 2019

Version:

Oct 1, 2019

Author:

Jens Richter

Constructor Summary

Constructors

Constructor	Description
OptionalOperatorTuningScheme(IOptimization optimization, boolean doOperatorTunig, com.dna.jopt.revision.algorithm.poststepmanagment.operatortuner.OperatorProbabilityTunerPropertyItem props)	Instantiates a new optional operator tuning scheme.

Method Summary

Modifier and Type	Method	Description
void	create()	Creates the defined scheme by adding the algorithms etc.

Methods inherited from class AbstractOptimizationScheme

attachCustomNodeLevelRestriction, attachCustomRouteLevelRestriction, getAssessorJobRestrictions, getAssessorMultiRouteRestrictions, getAssessorNodeRestrictions, getAssessorRouteRestrictions, getAutoFilter, getCostAssessor, getCustomDefaultProperties, getOptimization, getOptimizationAlgorithms, initAssessor, isPrepared, postCreate, prepareScheme, setAutoFilter, setCostAssessor, setCustomDefaultProperties, setIsPrepared, setOptimizationAlgorithms

Methods inherited from class Object

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

Constructor Details

OptionalOperatorTuningScheme

public OptionalOperatorTuningScheme(IOptimization optimization,
 boolean doOperatorTunig,
 com.dna.jopt.revision.algorithm.poststepmanagment.operatortuner.OperatorProbabilityTunerPropertyItem props)

Instantiates a new optional operator tuning scheme.

Parameters:

optimization - the optimization

doOperatorTunig - the do operator tuning

props - the props

Method Details

create

public void create()

Description copied from interface: IOptimizationScheme

Creates the defined scheme by adding the algorithms etc.