Example usage for org.jfree.data DateRange DateRange

Introduction

In this page you can find the example usage for org.jfree.data DateRange DateRange.

Prototype

public DateRange(final double lower, final double upper) 

Source Link

Document

Constructs a new range using two values that will be interpreted as "milliseconds since midnight GMT, 1-Jan-1970".

Usage

From source file:org.madsonic.controller.StatusChartController.java

public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    String type = request.getParameter("type");
    int index = Integer.parseInt(request.getParameter("index"));

    List<TransferStatus> statuses = Collections.emptyList();
    if ("stream".equals(type)) {
        statuses = statusService.getAllStreamStatuses();
    } else if ("download".equals(type)) {
        statuses = statusService.getAllDownloadStatuses();
    } else if ("upload".equals(type)) {
        statuses = statusService.getAllUploadStatuses();
    }/* ww w .ja  va 2 s . c om*/

    if (index < 0 || index >= statuses.size()) {
        return null;
    }
    TransferStatus status = statuses.get(index);

    TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
    TransferStatus.SampleHistory history = status.getHistory();
    long to = System.currentTimeMillis();
    long from = to - status.getHistoryLengthMillis();
    Range range = new DateRange(from, to);

    if (!history.isEmpty()) {

        TransferStatus.Sample previous = history.get(0);

        for (int i = 1; i < history.size(); i++) {
            TransferStatus.Sample sample = history.get(i);

            long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
            long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());

            double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
            series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);

            previous = sample;
        }
    }

    // Compute moving average.
    series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);

    // Find min and max values.
    double min = 100;
    double max = 250;
    for (Object obj : series.getItems()) {
        TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
        double value = item.getValue().doubleValue();
        if (item.getPeriod().getFirstMillisecond() > from) {
            min = Math.min(min, value);
            max = Math.max(max, value);
        }
    }

    // Add 10% to max value.
    max *= 1.1D;

    // Subtract 10% from min value.
    min *= 0.9D;

    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();

    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
    Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
    plot.setBackgroundPaint(background);

    XYItemRenderer renderer = plot.getRendererForDataset(dataset);
    renderer.setSeriesPaint(0, Color.gray.darker());
    renderer.setSeriesStroke(0, new BasicStroke(2f));

    // Set theme-specific colors.
    Color bgColor = getBackground(request);
    Color fgColor = getForeground(request);

    chart.setBackgroundPaint(bgColor);

    ValueAxis domainAxis = plot.getDomainAxis();
    domainAxis.setRange(range);
    domainAxis.setTickLabelPaint(fgColor);
    domainAxis.setTickMarkPaint(fgColor);
    domainAxis.setAxisLinePaint(fgColor);

    ValueAxis rangeAxis = plot.getRangeAxis();
    rangeAxis.setRange(new Range(min, max));
    rangeAxis.setTickLabelPaint(fgColor);
    rangeAxis.setTickMarkPaint(fgColor);
    rangeAxis.setAxisLinePaint(fgColor);

    ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);

    return null;
}

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From source file:net.sourceforge.subsonic.controller.StatusChartController.java

public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response)
        throws Exception {
    String type = request.getParameter("type");
    int index = Integer.parseInt(request.getParameter("index"));

    List<TransferStatus> statuses = Collections.emptyList();
    if ("stream".equals(type)) {
        statuses = statusService.getAllStreamStatuses();
    } else if ("download".equals(type)) {
        statuses = statusService.getAllDownloadStatuses();
    } else if ("upload".equals(type)) {
        statuses = statusService.getAllUploadStatuses();
    }/*from   w ww .  j  a  v a 2 s. c om*/

    if (index < 0 || index >= statuses.size()) {
        return null;
    }
    TransferStatus status = statuses.get(index);

    TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
    TransferStatus.SampleHistory history = status.getHistory();
    long to = System.currentTimeMillis();
    long from = to - status.getHistoryLengthMillis();
    Range range = new DateRange(from, to);

    if (!history.isEmpty()) {

        TransferStatus.Sample previous = history.get(0);

        for (int i = 1; i < history.size(); i++) {
            TransferStatus.Sample sample = history.get(i);

            long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
            long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());

            double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
            series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);

            previous = sample;
        }
    }

    // Compute moving average.
    series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);

    // Find min and max values.
    double min = 100;
    double max = 250;
    for (Object obj : series.getItems()) {
        TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
        double value = item.getValue().doubleValue();
        if (item.getPeriod().getFirstMillisecond() > from) {
            min = Math.min(min, value);
            max = Math.max(max, value);
        }
    }

    // Add 10% to max value.
    max *= 1.1D;

    // Subtract 10% from min value.
    min *= 0.9D;

    TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
    XYPlot plot = (XYPlot) chart.getPlot();

    plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
    Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
    plot.setBackgroundPaint(background);

    XYItemRenderer renderer = plot.getRendererForDataset(dataset);
    renderer.setSeriesPaint(0, Color.blue.darker());
    renderer.setSeriesStroke(0, new BasicStroke(2f));

    // Set theme-specific colors.
    Color bgColor = getBackground(request);
    Color fgColor = getForeground(request);

    chart.setBackgroundPaint(bgColor);

    ValueAxis domainAxis = plot.getDomainAxis();
    domainAxis.setRange(range);
    domainAxis.setTickLabelPaint(fgColor);
    domainAxis.setTickMarkPaint(fgColor);
    domainAxis.setAxisLinePaint(fgColor);

    ValueAxis rangeAxis = plot.getRangeAxis();
    rangeAxis.setRange(new Range(min, max));
    rangeAxis.setTickLabelPaint(fgColor);
    rangeAxis.setTickMarkPaint(fgColor);
    rangeAxis.setAxisLinePaint(fgColor);

    ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);

    return null;
}

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