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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

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package org.optaplanner.examples.cloudbalancing.domain;

import org.optaplanner.core.api.domain.entity.PlanningEntity;
import org.optaplanner.core.api.domain.variable.PlanningVariable;
import org.optaplanner.examples.cloudbalancing.domain.solver.CloudComputerStrengthComparator;
import org.optaplanner.examples.cloudbalancing.domain.solver.CloudProcessDifficultyComparator;
import org.optaplanner.examples.common.domain.AbstractPersistableJackson;
import org.optaplanner.examples.common.swingui.components.Labeled;

import com.fasterxml.jackson.annotation.JsonIgnore;

@PlanningEntity(difficultyComparatorClass = CloudProcessDifficultyComparator.class)
public class CloudProcess
        extends AbstractPersistableJackson
        implements Labeled {

    private int requiredCpuPower; // in gigahertz
    private int requiredMemory; // in gigabyte RAM
    private int requiredNetworkBandwidth; // in gigabyte per hour

    // Planning variables: changes during planning, between score calculations.
    private CloudComputer computer;

    CloudProcess() { // For Jackson.
    }

    public CloudProcess(long id, int requiredCpuPower, int requiredMemory, int requiredNetworkBandwidth) {
        super(id);
        this.requiredCpuPower = requiredCpuPower;
        this.requiredMemory = requiredMemory;
        this.requiredNetworkBandwidth = requiredNetworkBandwidth;
    }

    public int getRequiredCpuPower() {
        return requiredCpuPower;
    }

    public void setRequiredCpuPower(int requiredCpuPower) {
        this.requiredCpuPower = requiredCpuPower;
    }

    public int getRequiredMemory() {
        return requiredMemory;
    }

    public void setRequiredMemory(int requiredMemory) {
        this.requiredMemory = requiredMemory;
    }

    public int getRequiredNetworkBandwidth() {
        return requiredNetworkBandwidth;
    }

    public void setRequiredNetworkBandwidth(int requiredNetworkBandwidth) {
        this.requiredNetworkBandwidth = requiredNetworkBandwidth;
    }

    @PlanningVariable(valueRangeProviderRefs = {
            "computerRange" }, strengthComparatorClass = CloudComputerStrengthComparator.class)
    public CloudComputer getComputer() {
        return computer;
    }

    public void setComputer(CloudComputer computer) {
        this.computer = computer;
    }

    // ************************************************************************
    // Complex methods
    // ************************************************************************

    @JsonIgnore
    public int getRequiredMultiplicand() {
        return requiredCpuPower * requiredMemory * requiredNetworkBandwidth;
    }

    @Override
    public String getLabel() {
        return "Process " + id;
    }

}