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/*
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This file is part of Airsonic.
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Airsonic is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Airsonic is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Airsonic. If not, see <http://www.gnu.org/licenses/>.
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Copyright 2016 (C) Airsonic Authors
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Based upon Subsonic, Copyright 2009 (C) Sindre Mehus
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*/
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package org.airsonic.player.controller;
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import org.airsonic.player.domain.TransferStatus;
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import org.airsonic.player.service.StatusService;
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import org.jfree.chart.ChartFactory;
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import org.jfree.chart.ChartUtilities;
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import org.jfree.chart.JFreeChart;
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import org.jfree.chart.axis.AxisLocation;
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import org.jfree.chart.axis.ValueAxis;
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import org.jfree.chart.plot.XYPlot;
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import org.jfree.chart.renderer.xy.XYItemRenderer;
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import org.jfree.data.Range;
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import org.jfree.data.time.*;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.ServletRequestUtils;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.RequestMethod;
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import org.springframework.web.servlet.ModelAndView;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.awt.*;
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import java.util.Collections;
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import java.util.Date;
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import java.util.List;
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/**
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* Controller for generating a chart showing bitrate vs time.
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*
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* @author Sindre Mehus
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*/
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@Controller
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@RequestMapping("/statusChart")
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public class StatusChartController extends AbstractChartController {
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@Autowired
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private StatusService statusService;
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public static final int IMAGE_WIDTH = 350;
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public static final int IMAGE_HEIGHT = 150;
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@RequestMapping(method = RequestMethod.GET)
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public synchronized ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
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String type = request.getParameter("type");
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int index = ServletRequestUtils.getIntParameter(request, "index");
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List<TransferStatus> statuses = Collections.emptyList();
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if ("stream".equals(type)) {
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statuses = statusService.getAllStreamStatuses();
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} else if ("download".equals(type)) {
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statuses = statusService.getAllDownloadStatuses();
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} else if ("upload".equals(type)) {
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statuses = statusService.getAllUploadStatuses();
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}
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if (index < 0 || index >= statuses.size()) {
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return null;
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}
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TransferStatus status = statuses.get(index);
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TimeSeries series = new TimeSeries("Kbps", Millisecond.class);
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TransferStatus.SampleHistory history = status.getHistory();
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long to = System.currentTimeMillis();
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long from = to - status.getHistoryLengthMillis();
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Range range = new DateRange(from, to);
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if (!history.isEmpty()) {
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TransferStatus.Sample previous = history.get(0);
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for (int i = 1; i < history.size(); i++) {
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TransferStatus.Sample sample = history.get(i);
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long elapsedTimeMilis = sample.getTimestamp() - previous.getTimestamp();
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long bytesStreamed = Math.max(0L, sample.getBytesTransfered() - previous.getBytesTransfered());
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double kbps = (8.0 * bytesStreamed / 1024.0) / (elapsedTimeMilis / 1000.0);
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series.addOrUpdate(new Millisecond(new Date(sample.getTimestamp())), kbps);
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previous = sample;
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}
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}
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// Compute moving average.
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series = MovingAverage.createMovingAverage(series, "Kbps", 20000, 5000);
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// Find min and max values.
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double min = 100;
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double max = 250;
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for (Object obj : series.getItems()) {
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TimeSeriesDataItem item = (TimeSeriesDataItem) obj;
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double value = item.getValue().doubleValue();
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if (item.getPeriod().getFirstMillisecond() > from) {
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min = Math.min(min, value);
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max = Math.max(max, value);
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}
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}
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// Add 10% to max value.
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max *= 1.1D;
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// Subtract 10% from min value.
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min *= 0.9D;
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TimeSeriesCollection dataset = new TimeSeriesCollection();
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dataset.addSeries(series);
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JFreeChart chart = ChartFactory.createTimeSeriesChart(null, null, null, dataset, false, false, false);
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XYPlot plot = (XYPlot) chart.getPlot();
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plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_RIGHT);
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Paint background = new GradientPaint(0, 0, Color.lightGray, 0, IMAGE_HEIGHT, Color.white);
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plot.setBackgroundPaint(background);
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XYItemRenderer renderer = plot.getRendererForDataset(dataset);
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renderer.setSeriesPaint(0, Color.blue.darker());
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renderer.setSeriesStroke(0, new BasicStroke(2f));
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// Set theme-specific colors.
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Color bgColor = getBackground(request);
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Color fgColor = getForeground(request);
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chart.setBackgroundPaint(bgColor);
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ValueAxis domainAxis = plot.getDomainAxis();
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domainAxis.setRange(range);
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domainAxis.setTickLabelPaint(fgColor);
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domainAxis.setTickMarkPaint(fgColor);
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domainAxis.setAxisLinePaint(fgColor);
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ValueAxis rangeAxis = plot.getRangeAxis();
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rangeAxis.setRange(new Range(min, max));
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rangeAxis.setTickLabelPaint(fgColor);
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rangeAxis.setTickMarkPaint(fgColor);
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rangeAxis.setAxisLinePaint(fgColor);
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ChartUtilities.writeChartAsPNG(response.getOutputStream(), chart, IMAGE_WIDTH, IMAGE_HEIGHT);
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return null;
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}
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}
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