org.btrplace.btrpsl.constraint.RunningBuilder Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of btrpsl Show documentation

The btrplace specification language (btrpsl) allows to express constraints related to the placement of virtual machines in a datacenters. This language is dedicated to datacenters administrators and applications administrators that use Btrplace(http://btrp.inria.fr) to manage their nodes and virtual machines.

There is a newer version: 1.12.10

Show newest version

/*
 * 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.btrpsl.constraint;

import org.btrplace.btrpsl.element.BtrpOperand;
import org.btrplace.btrpsl.tree.BtrPlaceTree;
import org.btrplace.model.VM;
import org.btrplace.model.constraint.Running;
import org.btrplace.model.constraint.SatConstraint;

import java.util.Collections;
import java.util.List;

/**
 * A builder for {@link Running} constraints.
 *
 * @author Fabien Hermenier
 */
public class RunningBuilder extends DefaultSatConstraintBuilder {

    /**
     * Make a new builder.
     */
    public RunningBuilder() {
        super("running", new ConstraintParam[]{new ListOfParam("$vms", 1, BtrpOperand.Type.VM, false)});
    }

    /**
     * Build an online constraint.
     *
     * @param args must be 1 set of vms. The set must not be empty
     * @return a constraint
     */
    @Override
    public List buildConstraint(BtrPlaceTree t, List args) {
        if (checkConformance(t, args)) {
            List s = (List) params[0].transform(this, t, args.get(0));
            return s != null ? Running.newRunning(s) : Collections.emptyList();
        }
        return Collections.emptyList();
    }
}