/*
* The MIT License
*
* Copyright (c) 2004-2009, Sun Microsystems, Inc., Kohsuke Kawaguchi
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package hudson.model;
import hudson.util.TimeUnit2;
import hudson.util.NoOverlapCategoryAxis;
import hudson.util.ChartUtil;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.List;
import java.io.IOException;
import java.awt.*;
import java.util.Locale;
import org.jfree.data.category.DefaultCategoryDataset;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.axis.CategoryAxis;
import org.jfree.chart.axis.CategoryLabelPositions;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.renderer.category.LineAndShapeRenderer;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.ui.RectangleInsets;
import org.jvnet.localizer.Localizable;
import org.kohsuke.stapler.HttpResponse;
import org.kohsuke.stapler.StaplerRequest;
import org.kohsuke.stapler.StaplerResponse;
import org.kohsuke.stapler.export.Exported;
import org.kohsuke.stapler.export.ExportedBean;
import javax.servlet.ServletException;
/**
* Maintains several {@link TimeSeries} with different update frequencies to satisfy three goals;
* (1) retain data over long timespan, (2) save memory, and (3) retain accurate data for the recent past.
*
* All in all, one instance uses about 8KB space.
*
* @author Kohsuke Kawaguchi
*/
@ExportedBean
public class MultiStageTimeSeries {
/**
* Name of this data series.
*/
public final Localizable title;
/**
* Used to render a line in the trend chart.
*/
public final Color color;
/**
* Updated every 10 seconds. Keep data up to 1 hour.
*/
@Exported
public final TimeSeries sec10;
/**
* Updated every 1 min. Keep data up to 1 day.
*/
@Exported
public final TimeSeries min;
/**
* Updated every 1 hour. Keep data up to 4 weeks.
*/
@Exported
public final TimeSeries hour;
private int counter;
public MultiStageTimeSeries(Localizable title, Color color, float initialValue, float decay) {
this.title = title;
this.color = color;
this.sec10 = new TimeSeries(initialValue,decay,6*60);
this.min = new TimeSeries(initialValue,decay,60*24);
this.hour = new TimeSeries(initialValue,decay,28*24);
}
/**
* @deprecated since 2009-04-05.
* Use {@link #MultiStageTimeSeries(Localizable, Color, float, float)}
*/
public MultiStageTimeSeries(float initialValue, float decay) {
this(Messages._MultiStageTimeSeries_EMPTY_STRING(), Color.WHITE, initialValue,decay);
}
/**
* Call this method every 10 sec and supply a new data point.
*/
public void update(float f) {
counter = (counter+1)%360; // 1hour/10sec = 60mins/10sec=3600secs/10sec = 360
sec10.update(f);
if(counter%6==0) min.update(f);
if(counter==0) hour.update(f);
}
/**
* Selects a {@link TimeSeries}.
*/
public TimeSeries pick(TimeScale timeScale) {
switch (timeScale) {
case HOUR: return hour;
case MIN: return min;
case SEC10: return sec10;
default: throw new AssertionError();
}
}
/**
* Gets the most up-to-date data point value.
*/
public float getLatest(TimeScale timeScale) {
return pick(timeScale).getLatest();
}
public Api getApi() {
return new Api(this);
}
/**
* Choose which datapoint to use.
*/
public enum TimeScale {
SEC10(TimeUnit2.SECONDS.toMillis(10)),
MIN(TimeUnit2.MINUTES.toMillis(1)),
HOUR(TimeUnit2.HOURS.toMillis(1));
/**
* Number of milliseconds (10 secs, 1 min, and 1 hour)
* that this constant represents.
*/
public final long tick;
TimeScale(long tick) {
this.tick = tick;
}
/**
* Creates a new {@link DateFormat} suitable for processing
* this {@link TimeScale}.
*/
public DateFormat createDateFormat() {
switch (this) {
case HOUR: return new SimpleDateFormat("MMM/dd HH");
case MIN: return new SimpleDateFormat("HH:mm");
case SEC10: return new SimpleDateFormat("HH:mm:ss");
default: throw new AssertionError();
}
}
/**
* Parses the {@link TimeScale} from the query parameter.
*/
public static TimeScale parse(String type) {
if(type==null) return TimeScale.MIN;
return Enum.valueOf(TimeScale.class, type.toUpperCase(Locale.ENGLISH));
}
}
/**
* Represents the trend chart that consists of several {@link MultiStageTimeSeries}.
*
* <p>
* This object is renderable as HTTP response.
*/
public static final class TrendChart implements HttpResponse {
public final TimeScale timeScale;
public final List<MultiStageTimeSeries> series;
public final DefaultCategoryDataset dataset;
public TrendChart(TimeScale timeScale, MultiStageTimeSeries... series) {
this.timeScale = timeScale;
this.series = new ArrayList<MultiStageTimeSeries>(Arrays.asList(series));
this.dataset = createDataset();
}
/**
* Creates a {@link DefaultCategoryDataset} for rendering a graph from a set of {@link MultiStageTimeSeries}.
*/
private DefaultCategoryDataset createDataset() {
float[][] dataPoints = new float[series.size()][];
for (int i = 0; i < series.size(); i++)
dataPoints[i] = series.get(i).pick(timeScale).getHistory();
int dataLength = dataPoints[0].length;
for (float[] dataPoint : dataPoints)
assert dataLength ==dataPoint.length;
DefaultCategoryDataset ds = new DefaultCategoryDataset();
DateFormat format = timeScale.createDateFormat();
Date dt = new Date(System.currentTimeMillis()-timeScale.tick*dataLength);
for (int i = dataLength-1; i>=0; i--) {
dt = new Date(dt.getTime()+timeScale.tick);
String l = format.format(dt);
for(int j=0; j<dataPoints.length; j++)
ds.addValue(dataPoints[j][i],series.get(j).title.toString(),l);
}
return ds;
}
/**
* Draws a chart into {@link JFreeChart}.
*/
public JFreeChart createChart() {
final JFreeChart chart = ChartFactory.createLineChart(null, // chart title
null, // unused
null, // range axis label
dataset, // data
PlotOrientation.VERTICAL, // orientation
true, // include legend
true, // tooltips
false // urls
);
chart.setBackgroundPaint(Color.white);
final CategoryPlot plot = chart.getCategoryPlot();
plot.setBackgroundPaint(Color.WHITE);
plot.setOutlinePaint(null);
plot.setRangeGridlinesVisible(true);
plot.setRangeGridlinePaint(Color.black);
final LineAndShapeRenderer renderer = (LineAndShapeRenderer) plot.getRenderer();
renderer.setBaseStroke(new BasicStroke(3));
for (int i = 0; i < series.size(); i++)
renderer.setSeriesPaint(i, series.get(i).color);
final CategoryAxis domainAxis = new NoOverlapCategoryAxis(null);
plot.setDomainAxis(domainAxis);
domainAxis.setCategoryLabelPositions(CategoryLabelPositions.UP_90);
domainAxis.setLowerMargin(0.0);
domainAxis.setUpperMargin(0.0);
domainAxis.setCategoryMargin(0.0);
final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
// crop extra space around the graph
plot.setInsets(new RectangleInsets(0, 0, 0, 5.0));
return chart;
}
/**
* Renders this object as an image.
*/
public void generateResponse(StaplerRequest req, StaplerResponse rsp, Object node) throws IOException, ServletException {
ChartUtil.generateGraph(req, rsp, createChart(), 500, 400);
}
}
public static TrendChart createTrendChart(TimeScale scale, MultiStageTimeSeries... data) {
return new TrendChart(scale,data);
}
}