Latency.java

/**
 * This file is part of the Kompics P2P Framework.
 *
 * Copyright (C) 2009 Swedish Institute of Computer Science (SICS)
 * Copyright (C) 2009 Royal Institute of Technology (KTH)
 *
 * Kompics is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package se.sics.gvod.simulator.vod;

import java.util.Random;
import se.sics.gvod.net.msgs.RewriteableMsg;
import se.sics.gvod.network.model.common.NetworkModel;

import se.sics.kompics.p2p.experiment.dsl.distribution.Distribution;
import se.sics.kompics.p2p.experiment.dsl.distribution.LongNormalDistribution;
/**
 * 
 * @author gautier
 */
public class Latency implements NetworkModel {

    private final Distribution<Long> d;

    public Latency(long mean, long variance, int seed) {
        d = new LongNormalDistribution(mean, variance, new Random(seed));
    }

    @Override
    public long getLatencyMs(RewriteableMsg message) {
        long result;
        do {
            result = d.draw();
        } while (result <= 0);
        return result;
    }
}