org.btrplace.scheduler.choco.transition.KeepRunningVM Maven / Gradle / Ivy

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/*
 * Copyright (c) 2016 University Nice Sophia Antipolis
 *
 * This file is part of btrplace.
 * This library 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.
 *
 * This library 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 this program.  If not, see .
 */

package org.btrplace.scheduler.choco.transition;


import org.chocosolver.solver.variables.BoolVar;

/**
 * An interface to specify an VM transition on a VM that is running and that will keep running.
 *
 * @author Fabien Hermenier
 */
public interface KeepRunningVM extends VMTransition {


    /**
     * Indicates if the VMs is staying on its current hosting node.
     *
     * @return a variable instantiated to {@code 1} iff the VM is staying on its current node.
     * Instantiated to {@code 0} otherwise
     */
    BoolVar isStaying();
}