org.portico.pgauge.gui.LatencyChart.java Source code

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Here is the source code for org.portico.pgauge.gui.LatencyChart.java

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/*
 *   Copyright 2009 The Portico Project
 *
 *   This file is part of pgauge (a sub-project of Portico).
 *
 *   pgauge is free software; you can redistribute it and/or modify
 *   it under the terms of the Common Developer and Distribution License (CDDL) 
 *   as published by Sun Microsystems. For more information see the LICENSE file.
 *   
 *   Use of this software is strictly AT YOUR OWN RISK!!!
 *   If something bad happens you do not have permission to come crying to me.
 *   (that goes for your lawyer as well)
 *
 */
package org.portico.pgauge.gui;

import javax.swing.JFrame;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;
import org.portico.pgauge.PGConfiguration;
import org.portico.pgauge.latency.LatencyDataset;

public class LatencyChart extends JFrame {
    //----------------------------------------------------------
    //                    STATIC VARIABLES
    //----------------------------------------------------------
    private static final long serialVersionUID = 98121116105109L;

    //----------------------------------------------------------
    //                   INSTANCE VARIABLES
    //----------------------------------------------------------
    private LatencyDataset rawdata;
    private XYSeries series;
    private XYSeriesCollection dataset;
    private JFreeChart chart;
    private ChartPanel panel;

    //----------------------------------------------------------
    //                      CONSTRUCTORS
    //----------------------------------------------------------
    public LatencyChart(LatencyDataset rawdata, PGConfiguration configuration) {
        this.rawdata = rawdata;
        this.series = new XYSeries("Iterations");
        this.dataset = new XYSeriesCollection(series);
        backfill(); // will initialize dataset

        // create the chart
        String title = "Round-Trip Latency (" + configuration.getPayloadSizeAsString() + " packets)";
        this.chart = ChartFactory.createXYLineChart(title, "Iterations", "Latency (microseconds)", dataset,
                PlotOrientation.VERTICAL, false, // legend
                true, // tooltips
                false); // urls

        // set max at 3 standard deviations from mean
        long max = rawdata.getAverage() + (long) (3 * rawdata.getStandardDeviation());
        chart.getXYPlot().getRangeAxis().setRange(0, max);

        this.panel = new ChartPanel(this.chart);
        getContentPane().add(this.panel);
        this.pack();
        this.setVisible(true);
    }

    //----------------------------------------------------------
    //                    INSTANCE METHODS
    //----------------------------------------------------------
    public void updateChart(int iteration) {
        // conver the nano time into microseconds
        series.add(iteration, rawdata.get(iteration));
    }

    private void backfill() {
        for (int i = 0; i < rawdata.size(); i++)
            updateChart(i);
    }

    //----------------------------------------------------------
    //                     STATIC METHODS
    //----------------------------------------------------------
}