001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portlet.admin.action;
016    
017    import com.liferay.portal.kernel.util.ContentTypes;
018    import com.liferay.portal.kernel.util.ParamUtil;
019    import com.liferay.portal.kernel.util.StringBundler;
020    import com.liferay.portal.kernel.util.StringPool;
021    import com.liferay.portal.struts.PortletAction;
022    import com.liferay.portal.theme.ThemeDisplay;
023    import com.liferay.portal.util.WebKeys;
024    
025    import java.awt.BasicStroke;
026    import java.awt.Color;
027    import java.awt.Font;
028    
029    import java.io.OutputStream;
030    
031    import javax.portlet.PortletConfig;
032    import javax.portlet.ResourceRequest;
033    import javax.portlet.ResourceResponse;
034    
035    import org.apache.struts.action.ActionForm;
036    import org.apache.struts.action.ActionMapping;
037    
038    import org.jfree.chart.ChartUtilities;
039    import org.jfree.chart.JFreeChart;
040    import org.jfree.chart.plot.DialShape;
041    import org.jfree.chart.plot.MeterInterval;
042    import org.jfree.chart.plot.MeterPlot;
043    import org.jfree.data.Range;
044    import org.jfree.data.general.DefaultValueDataset;
045    import org.jfree.data.general.ValueDataset;
046    
047    /**
048     * @author Matthew Kong
049     */
050    public class ViewChartAction extends PortletAction {
051    
052            @Override
053            public void serveResource(
054                            ActionMapping actionMapping, ActionForm actionForm,
055                            PortletConfig portletConfig, ResourceRequest resourceRequest,
056                            ResourceResponse resourceResponse)
057                    throws Exception {
058    
059                    ThemeDisplay themeDisplay = (ThemeDisplay)resourceRequest.getAttribute(
060                            WebKeys.THEME_DISPLAY);
061    
062                    String type = ParamUtil.getString(resourceRequest, "type", "max");
063                    long maxMemory = ParamUtil.getLong(resourceRequest, "maxMemory");
064                    long totalMemory = ParamUtil.getLong(resourceRequest, "totalMemory");
065                    long usedMemory = ParamUtil.getLong(resourceRequest, "usedMemory");
066    
067                    ValueDataset valueDataset = null;
068    
069                    StringBundler sb = new StringBundler(5);
070    
071                    sb.append(themeDisplay.translate("used-memory"));
072                    sb.append(StringPool.SPACE);
073                    sb.append(StringPool.FORWARD_SLASH);
074                    sb.append(StringPool.SPACE);
075    
076                    if (type.equals("total")) {
077                            valueDataset = new DefaultValueDataset(
078                                    (usedMemory * 100) / totalMemory);
079    
080                            sb.append(themeDisplay.translate("total-memory"));
081                    }
082                    else {
083                            valueDataset = new DefaultValueDataset(
084                                    (usedMemory * 100) / maxMemory);
085    
086                            sb.append(themeDisplay.translate("maximum-memory"));
087                    }
088    
089                    MeterPlot meterPlot = getMeterPlot(themeDisplay, valueDataset);
090    
091                    JFreeChart jFreeChart = getJFreeChart(sb.toString(), meterPlot);
092    
093                    resourceResponse.setContentType(ContentTypes.IMAGE_PNG);
094    
095                    OutputStream outputStream = resourceResponse.getPortletOutputStream();
096    
097                    ChartUtilities.writeChartAsPNG(outputStream, jFreeChart, 280, 180);
098            }
099    
100            protected JFreeChart getJFreeChart(String title, MeterPlot meterPlot) {
101                    JFreeChart jFreeChart = new JFreeChart(
102                            title, new Font(null, Font.PLAIN, 13), meterPlot, true);
103    
104                    jFreeChart.removeLegend();
105                    jFreeChart.setBackgroundPaint(Color.white);
106    
107                    return jFreeChart;
108            }
109    
110            protected MeterPlot getMeterPlot(
111                    ThemeDisplay themeDisplay, ValueDataset valueDataset) {
112    
113                    MeterPlot meterPlot = new MeterPlot(valueDataset);
114    
115                    meterPlot.addInterval(
116                            new MeterInterval(
117                                    themeDisplay.translate("normal"), new Range(0.0D, 75D),
118                                    Color.lightGray, new BasicStroke(2.0F),
119                                    new Color(0, 255, 0, 64)));
120    
121                    meterPlot.addInterval(
122                            new MeterInterval(
123                                    themeDisplay.translate("warning"), new Range(75D, 90D),
124                                    Color.lightGray, new BasicStroke(2.0F),
125                                    new Color(255, 255, 0, 64)));
126    
127                    meterPlot.addInterval(
128                            new MeterInterval(
129                                    themeDisplay.translate("critical"), new Range(90D, 100D),
130                                    Color.lightGray, new BasicStroke(2.0F),
131                                    new Color(255, 0, 0, 128)));
132    
133                    meterPlot.setDialBackgroundPaint(Color.white);
134                    meterPlot.setDialShape(DialShape.PIE);
135                    meterPlot.setDialOutlinePaint(Color.gray);
136                    meterPlot.setTickLabelFont(new Font(null, Font.PLAIN, 10));
137                    meterPlot.setTickLabelPaint(Color.darkGray);
138                    meterPlot.setTickLabelsVisible(true);
139                    meterPlot.setTickPaint(Color.lightGray);
140                    meterPlot.setTickSize(5D);
141                    meterPlot.setMeterAngle(180);
142                    meterPlot.setNeedlePaint(Color.darkGray);
143                    meterPlot.setRange(new Range(0.0D, 100D));
144                    meterPlot.setValueFont(new Font(null, Font.PLAIN, 10));
145                    meterPlot.setValuePaint(Color.black);
146                    meterPlot.setUnits("%");
147    
148                    return meterPlot;
149            }
150    
151            @Override
152            protected boolean isCheckMethodOnProcessAction() {
153                    return _CHECK_METHOD_ON_PROCESS_ACTION;
154            }
155    
156            private static final boolean _CHECK_METHOD_ON_PROCESS_ACTION = false;
157    
158    }