net.relet.freimap.NodeInfo.java Source code

Introduction

Here is the source code for net.relet.freimap.NodeInfo.java

Source

/* net.relet.freimap.NodeInfo.java
    
  This file is part of the freimap software available at freimap.berlios.de
    
  This software is copyright (c)2007 Thomas Hirsch <thomas hirsch gmail com>
    
  This program 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 with
  the Debian GNU/Linux distribution in file /doc/gpl.txt
  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  Suite 330, Boston, MA 02111-1307 USA
*/

package net.relet.freimap;

import java.util.*;

import org.jfree.chart.*;
import org.jfree.chart.axis.*;
import org.jfree.chart.plot.*;
import org.jfree.chart.title.*;
import org.jfree.data.xy.*;

public class NodeInfo {
    public static final int CHART_WIDTH = 100;

    public static final int STATUS_FETCHING = 0;
    public static final int STATUS_AVAILABLE = 100;
    public static final int STATUS_FAILED = -100;

    //Hashtable<Long,Integer> linkCountProfile;
    JFreeChart linkCountChart;
    public int minLinks = Integer.MAX_VALUE, maxLinks = -1;
    public int status = STATUS_FETCHING;

    public void setLinkCountProfile(LinkedList<LinkCount> lcp) {
        if (lcp.size() == 0) {
            minLinks = 0;
            maxLinks = 0;
            return;
        }

        XYSeries data = new XYSeries("links");
        XYSeries avail = new XYSeries("avail");
        XYSeriesCollection datac = new XYSeriesCollection(data);
        datac.addSeries(avail);
        linkCountChart = ChartFactory.createXYLineChart("average incoming link count\r\nincoming link availability",
                "time", "count", datac, PlotOrientation.VERTICAL, false, false, false);
        sexupLayout(linkCountChart);

        long first = lcp.getFirst().time, last = lcp.getLast().time, lastClock = first, count = 0, maxCount = 0;
        long aggregate = (last - first) / CHART_WIDTH;
        double sum = 0;

        /* ok, this ain't effective, we do it just to pre-calculate maxCount */
        ListIterator<LinkCount> li = lcp.listIterator();
        while (li.hasNext()) {
            LinkCount lc = li.next();
            count++;
            if (lc.time - lastClock > aggregate) {
                if (maxCount < count)
                    maxCount = count;
                lastClock = lc.time;
                count = 0;
            }
        }

        //reset for second iteration
        count = 0;
        lastClock = first;

        //iterate again
        li = lcp.listIterator();
        while (li.hasNext()) {
            LinkCount lc = li.next();
            if (minLinks > lc.count)
                minLinks = lc.count;
            if (maxLinks < lc.count)
                maxLinks = lc.count;

            sum += lc.count;
            count++;

            if (aggregate == 0)
                aggregate = 1000;//dirty hack
            if (lc.time - lastClock > aggregate) {
                for (long i = lastClock; i < lc.time - aggregate; i += aggregate) {
                    data.add(i * 1000, (i == lastClock) ? sum / count : Double.NaN);
                    avail.add(i * 1000, (i == lastClock) ? ((double) count / maxCount) : 0);
                }

                count = 0;
                sum = 0;
                lastClock = lc.time;
            }
        }

        status = STATUS_AVAILABLE;
    }

    private void sexupAxis(ValueAxis axis) {
        axis.setLabelFont(VisorFrame.smallerfont);
        axis.setLabelPaint(VisorFrame.fgcolor);
        axis.setTickLabelFont(VisorFrame.smallerfont);
        axis.setTickLabelPaint(VisorFrame.fgcolor);
    }

    private void sexupLayout(JFreeChart chart) {
        chart.setAntiAlias(true);
        chart.setBackgroundPaint(VisorFrame.bgcolor);
        chart.setBorderVisible(false);
        TextTitle title = chart.getTitle();
        title.setFont(VisorFrame.smallerfont);
        title.setPaint(VisorFrame.fgcolor);
        XYPlot plot = chart.getXYPlot();
        plot.setBackgroundPaint(VisorFrame.bgcolor);
        plot.setDomainAxis(new DateAxis());
        sexupAxis(plot.getDomainAxis());
        sexupAxis(plot.getRangeAxis());
    }
}