Package de.uka.ipd.sdq.dsexplore.opt4j.optimizer.heuristic.operators.impl

Class ServerExpansionImpl

java.lang.Object

de.uka.ipd.sdq.dsexplore.opt4j.optimizer.heuristic.operators.AbstractTactic

de.uka.ipd.sdq.dsexplore.opt4j.optimizer.heuristic.operators.impl.ServerExpansionImpl

All Implemented Interfaces:

ITactic

public class ServerExpansionImpl
extends AbstractTactic

Implements a server expansion heuristic. This heuristic finds a highly utilised resource container, creates a new resource container and reallocates components to this new resource container

Field Summary

Fields inherited from class de.uka.ipd.sdq.dsexplore.opt4j.optimizer.heuristic.operators.AbstractTactic

copy, individualFactory

Constructor Summary

Constructors

Constructor	Description
ServerExpansionImpl(org.opt4j.operator.copy.Copy<org.opt4j.core.Genotype> copy, DSEIndividualFactory individualFactory, DSEWorkflowConfiguration configuration)

Method Summary

Modifier and Type	Method	Description
boolean	doesMatchPrecondition(DSEIndividual individual)	Check whether there is a resource container that has a utilisation >= THRESHOLD_HIGH_UTILISATION and there is a least one unused resource container (unused means no allocated components)
List<TacticsResultCandidate>	getHeuristicCandidates(DSEIndividual individual, UtilisationResultCacheAndHelper resultsHelper)	Generates collection of candidates by applying the server consolidation heuristic

Methods inherited from class de.uka.ipd.sdq.dsexplore.opt4j.optimizer.heuristic.operators.AbstractTactic

doesNotImprove, getHeuristicWeight, getNumberOfGeneratedCandidates, improves, increaseCounterOfGeneratedCandidates, setHeuristicWeight

Methods inherited from class java.lang.Object

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

Constructor Details

ServerExpansionImpl

public ServerExpansionImpl(org.opt4j.operator.copy.Copy<org.opt4j.core.Genotype> copy,
 DSEIndividualFactory individualFactory,
 DSEWorkflowConfiguration configuration)

Parameters:

copy - Used to copy genotype

individualFactory - Used to build individual

Method Details

doesMatchPrecondition

public boolean doesMatchPrecondition(DSEIndividual individual)

Check whether there is a resource container that has a utilisation >= THRESHOLD_HIGH_UTILISATION and there is a least one unused resource container (unused means no allocated components)

Parameters:

individual -

Returns:

getHeuristicCandidates

public List<TacticsResultCandidate> getHeuristicCandidates(DSEIndividual individual,
 UtilisationResultCacheAndHelper resultsHelper)

Generates collection of candidates by applying the server consolidation heuristic

Parameters:

individual - Individual which the heuristic should be applied to

Returns:

Collection of improved individuals