/* Copyright (c) 2001 - 2011 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, availible at the root
* application directory.
*/
package org.geoserver.monitor.web;
import java.awt.Color;
import java.awt.geom.Rectangle2D;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import org.apache.wicket.Resource;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.ajax.markup.html.form.AjaxButton;
import org.apache.wicket.extensions.yui.calendar.DateTimeField;
import org.apache.wicket.markup.html.form.Form;
import org.apache.wicket.markup.html.image.NonCachingImage;
import org.apache.wicket.markup.html.image.resource.BufferedDynamicImageResource;
import org.apache.wicket.markup.html.panel.Panel;
import org.apache.wicket.model.Model;
import org.apache.wicket.model.PropertyModel;
import org.geoserver.monitor.Monitor;
import org.geoserver.monitor.Query;
import org.geoserver.monitor.RequestData;
import org.geoserver.monitor.RequestDataVisitor;
import org.geoserver.web.GeoServerApplication;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.labels.StandardXYToolTipGenerator;
import org.jfree.chart.labels.XYToolTipGenerator;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.chart.title.TextTitle;
import org.jfree.chart.urls.StandardXYURLGenerator;
import org.jfree.chart.urls.XYURLGenerator;
import org.jfree.data.time.RegularTimePeriod;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.time.TimeSeriesDataItem;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.HorizontalAlignment;
public abstract class ActivityChartBasePanel extends Panel {
protected static long PAGE_OFFSET = 1000;
protected static SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd");
Date from;
Date to;
NonCachingImage chartImage;
public ActivityChartBasePanel(String id, Monitor monitor) {
super(id);
Date[] range = getDateRange();
BufferedDynamicImageResource resource = queryAndRenderChart(monitor, range);
add(chartImage = new NonCachingImage("chart", resource));
chartImage.setOutputMarkupId(true);
Form form = new Form("form");
add(form);
from = new Date(range[0].getTime());
to = new Date(range[1].getTime());
form.add(new DateTimeField("from", new PropertyModel<Date>(this,"from")) {
@Override
protected boolean use12HourFormat() {
return false;
}
});
form.add(new DateTimeField("to", new PropertyModel<Date>(this, "to")) {
@Override
protected boolean use12HourFormat() {
return false;
}
});
form.add(new AjaxButton("refresh") {
@Override
protected void onSubmit(AjaxRequestTarget target, Form form) {
Monitor monitor =
((GeoServerApplication)getApplication()).getBeanOfType(Monitor.class);
Date[] range = new Date[]{ from, to };
chartImage.setImageResource(queryAndRenderChart(monitor, range));
target.addComponent(chartImage);
}
});
}
BufferedDynamicImageResource queryAndRenderChart(Monitor monitor, Date[] range) {
Query q = new Query();
q.properties("startTime").between(range[0], range[1]);
DataGatherer gatherer = new DataGatherer();
monitor.query(q, gatherer);
HashMap<RegularTimePeriod,Integer> data = gatherer.getData();
Class timeUnitClass = getTimePeriod(range[0]).getClass();
TimeSeries series = new TimeSeries("foo", timeUnitClass);
for (Map.Entry<RegularTimePeriod, Integer> d : data.entrySet()) {
series.add(new TimeSeriesDataItem(d.getKey(), d.getValue()));
}
TimeSeriesCollection dataset = new TimeSeriesCollection(series);
final JFreeChart chart = createTimeSeriesChart(getChartTitle(range),
"Time ("+timeUnitClass.getSimpleName()+")", "Requests", dataset);
BufferedDynamicImageResource resource = new BufferedDynamicImageResource();
resource.setImage(chart.createBufferedImage(700,500));
return resource;
}
JFreeChart createTimeSeriesChart(String title, String timeAxisLabel, String valueAxisLabel,
XYDataset dataset) {
ValueAxis timeAxis = new DateAxis(timeAxisLabel);
timeAxis.setLowerMargin(0.02); // reduce the default margins
timeAxis.setUpperMargin(0.02);
NumberAxis valueAxis = new NumberAxis(valueAxisLabel);
valueAxis.setAutoRangeIncludesZero(false); // override default
XYPlot plot = new XYPlot(dataset, timeAxis, valueAxis, null);
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, false);
plot.setRenderer(renderer);
JFreeChart chart = new JFreeChart(plot);
//TextTitle t = new TextTitle(title);
//t.setTextAlignment(HorizontalAlignment.LEFT);
//chart.setTitle(t);
chart.setBackgroundPaint(Color.WHITE);
chart.setAntiAlias(true);
chart.clearSubtitles();
return chart;
}
class DataGatherer implements RequestDataVisitor {
HashMap<RegularTimePeriod,Integer> data = new HashMap<RegularTimePeriod, Integer>();
public void visit(RequestData r, Object... aggregates) {
RegularTimePeriod period = getTimePeriod(r.getStartTime());
Integer count = data.get(period);
if (count == null) {
count = new Integer(1);
}
else {
count = new Integer(count.intValue()+1);
}
data.put(period,count);
}
public HashMap<RegularTimePeriod, Integer> getData() {
return data;
}
}
protected String getChartTitle(Date[] range) {
return "Activity " + FORMAT.format(range[0]) + " - " + FORMAT.format(range[1]);
}
protected abstract Date[] getDateRange();
protected abstract RegularTimePeriod getTimePeriod(Date time);
}