uk.co.petertribble.jkstat.demo.JLoadChart.java Source code

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Here is the source code for uk.co.petertribble.jkstat.demo.JLoadChart.java

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/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
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package uk.co.petertribble.jkstat.demo;

import javax.swing.*;
import java.awt.event.*;
import uk.co.petertribble.jkstat.api.*;
import uk.co.petertribble.jkstat.gui.KstatResources;

import org.jfree.chart.*;
import org.jfree.data.time.*;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;

/**
 * Show the 1, 5, and 15 minute averages on a chart.
 *
 * @author Peter Tribble
 */
public final class JLoadChart extends JFrame implements ActionListener {

    private TimeSeries ts1;
    private TimeSeries ts5;
    private TimeSeries ts15;

    private JKstat jkstat;
    private JMenuItem exitItem;

    /**
     * A standalone demo charting load averages.
     */
    public JLoadChart() {
        super("JLoadChart");

        jkstat = new NativeJKstat();
        int maxage = 600000;

        String lavetext = KstatResources.getString("LOAD.AVERAGE.TEXT");
        ts1 = new TimeSeries("1min " + lavetext);
        ts1.setMaximumItemAge(maxage);
        ts5 = new TimeSeries("5min " + lavetext);
        ts5.setMaximumItemAge(maxage);
        ts15 = new TimeSeries("15min " + lavetext);
        ts15.setMaximumItemAge(maxage);

        updateAccessory();
        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(ts1);
        dataset.addSeries(ts5);
        dataset.addSeries(ts15);

        JFreeChart chart = ChartFactory.createTimeSeriesChart(lavetext, KstatResources.getString("CHART.TIME"),
                KstatResources.getString("LOAD.LOAD.TEXT"), dataset, true, true, false);

        XYPlot xyplot = chart.getXYPlot();

        NumberAxis loadaxis = new NumberAxis(KstatResources.getString("LOAD.LOAD.TEXT"));
        loadaxis.setAutoRange(true);
        loadaxis.setAutoRangeIncludesZero(true);
        xyplot.setRangeAxis(loadaxis);

        DateAxis daxis = new DateAxis(KstatResources.getString("CHART.TIME"));
        daxis.setAutoRange(true);
        daxis.setFixedAutoRange(maxage);
        xyplot.setDomainAxis(daxis);

        addWindowListener(new winExit());
        setContentPane(new ChartPanel(chart));

        JMenuBar jm = new JMenuBar();
        JMenu jme = new JMenu(KstatResources.getString("FILE.TEXT"));
        jme.setMnemonic(KeyEvent.VK_F);
        exitItem = new JMenuItem(KstatResources.getString("FILE.EXIT.TEXT"), KeyEvent.VK_X);
        exitItem.addActionListener(this);
        jme.add(exitItem);
        jm.add(jme);

        setJMenuBar(jm);

        pack();
        setVisible(true);
        Timer timer = new Timer(5000, this);
        timer.start();
    }

    private void updateAccessory() {
        Kstat ksl = jkstat.getKstat("unix", 0, "system_misc");
        Millisecond ms = new Millisecond();
        ts1.add(ms, ksl.longData("avenrun_1min") / 256.0);
        ts5.add(ms, ksl.longData("avenrun_5min") / 256.0);
        ts15.add(ms, ksl.longData("avenrun_15min") / 256.0);
    }

    static class winExit extends WindowAdapter {
        public void windowClosing(WindowEvent we) {
            System.exit(0);
        }
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == exitItem) {
            System.exit(0);
        } else {
            updateAccessory();
        }
    }

    /**
     * Create the application.
     *
     * @param args command line arguments, ignored
     */
    public static void main(String[] args) {
        new JLoadChart();
    }
}