/*
* Copyright (c) 2005-2011 KOM - Multimedia Communications Lab
*
* This file is part of PeerfactSim.KOM.
*
* PeerfactSim.KOM 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 3 of the License, or
* any later version.
*
* PeerfactSim.KOM 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 PeerfactSim.KOM. If not, see .
*
*/
package de.tud.kom.p2psim.impl.network.bandwidthDetermination;
import java.util.Random;
import de.tud.kom.p2psim.api.network.BandwidthDetermination;
import de.tud.kom.p2psim.api.network.BandwidthImpl;
import de.tudarmstadt.maki.simonstrator.api.Randoms;
/**
* This class implements a randomized determination of bandwidth, that follows
* no certain distribution, but is used to omit a static assignment of
* bandwidth-capacities.
*
* @author Dominik Stingl
*
*/
public class RandomizedBandwidthDetermination implements
BandwidthDetermination {
private double maxDownBandwidth = 10000d;
private double minDownBandwidth = 5000d;
private double upstreamBWQuota = 0.1;
private Random rnd = Randoms
.getRandom(RandomizedBandwidthDetermination.class);
@Override
public BandwidthImpl getBandwidthByObject(Integer object) {
// not needed
return null;
}
@Override
public BandwidthImpl getRandomBandwidth() {
double downBandwidth = minDownBandwidth + rnd.nextDouble()
* (maxDownBandwidth - minDownBandwidth);
double upBandwidth = downBandwidth * upstreamBWQuota;
return new BandwidthImpl((long)Math.floor(downBandwidth), (long)Math.floor(upBandwidth));
}
public void setMaxDownBandwidth(double maxDownBandwidth) {
this.maxDownBandwidth = maxDownBandwidth;
}
public void setMinDownBandwidth(double minDownBandwidth) {
this.minDownBandwidth = minDownBandwidth;
}
@Override
public void writeBackToXML(BackWriter bw) {
bw.writeSimpleType("maxDownBandwidth", maxDownBandwidth);
bw.writeSimpleType("minDownBandwidth", minDownBandwidth);
}
}