StayOfflineNodeActionModel.java

/*
 * Copyright (c) Fabien Hermenier
 *
 *        This file is part of Entropy.
 *
 *        Entropy is free software: you can redistribute it and/or modify
 *        it under the terms of the GNU Lesser General Public License as published by
 *        the Free Software Foundation, either version 3 of the License, or
 *        (at your option) any later version.
 *
 *        Entropy is distributed in the hope that it will be useful,
 *        but WITHOUT ANY WARRANTY; without even the implied warranty of
 *        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *        GNU Lesser General Public License for more details.
 *
 *        You should have received a copy of the GNU Lesser General Public License
 *        along with Entropy.  If not, see <http://www.gnu.org/licenses/>.
 */
package entropy.plan.choco.actionModel;

import choco.kernel.solver.variables.integer.IntDomainVar;
import entropy.configuration.Configuration;
import entropy.configuration.Node;
import entropy.plan.action.Action;
import entropy.plan.choco.ReconfigurationProblem;
import entropy.plan.choco.actionModel.slice.DemandingSlice;

/**
 * An action to model the shutdown process of a node.
 *
 * @author Fabien Hermenier
 */
public class StayOfflineNodeActionModel extends NodeActionModel {

    private IntDomainVar zero;

    /**
     * Make a new action.
     *
     * @param model the model of the reconfiguration problem
     * @param n     the node involved in the action
     */
    public StayOfflineNodeActionModel(ReconfigurationProblem model, Node n) {
        super(n);
        this.zero = model.createIntegerConstant("cost", 0);
        this.dSlice = new DemandingSlice(model, "stayOffline(" + n.getName() + ")", model.getNode(n), 0, n.getCPUCapacity(), n.getMemoryCapacity());
    }


    /**
     * No action, so start moment equals 0
     *
     * @return <code>the constant 0</code>
     */
    @Override
    public IntDomainVar start() {
        return zero;
    }

    /**
     * No action, so end moment equals 0
     *
     * @return <code>the constant 0</code>
     */
    @Override
    public IntDomainVar end() {
        return zero;
    }

    /**
     * No action, so duration equals 0
     *
     * @return <code>the constant 0</code>
     */
    @Override
    public IntDomainVar getDuration() {
        return zero;
    }

    /**
     * @return {@code null}
     */
    @Override
    public Action getDefinedAction(ReconfigurationProblem solver) {
        return null;  //To change body of implemented methods use File | Settings | File Templates.
    }

    @Override
    public boolean putResult(ReconfigurationProblem solver, Configuration cfg) {
        return cfg.addOffline(getNode());
    }

    @Override
    public String toString() {
        return new StringBuilder("stayOffline(").append(getNode().getName()).append(")").toString();
    }

    @Override
    public DemandingSlice getDemandingSlice() {
        return dSlice;
    }

    /**
     * No action, so cost equals 0
     *
     * @return <code>the constant 0</code>
     */
    @Override
    public IntDomainVar getGlobalCost() {
        return this.zero;
    }
}