com.liferay.server.admin.web.internal.portlet.action.ViewChartMVCResourceCommand.java Source code

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Here is the source code for com.liferay.server.admin.web.internal.portlet.action.ViewChartMVCResourceCommand.java

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 */

package com.liferay.server.admin.web.internal.portlet.action;

import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCResourceCommand;
import com.liferay.portal.kernel.portlet.bridges.mvc.MVCResourceCommand;
import com.liferay.portal.kernel.theme.ThemeDisplay;
import com.liferay.portal.kernel.util.ContentTypes;
import com.liferay.portal.kernel.util.ParamUtil;
import com.liferay.portal.kernel.util.PortletKeys;
import com.liferay.portal.kernel.util.ResourceBundleUtil;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.WebKeys;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;

import java.util.ResourceBundle;

import javax.portlet.ResourceRequest;
import javax.portlet.ResourceResponse;

import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.DialShape;
import org.jfree.chart.plot.MeterInterval;
import org.jfree.chart.plot.MeterPlot;
import org.jfree.data.Range;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.data.general.ValueDataset;

import org.osgi.service.component.annotations.Component;

/**
 * @author Matthew Kong
 * @author Philip Jones
 */
@Component(property = { "javax.portlet.name=" + PortletKeys.SERVER_ADMIN,
        "mvc.command.name=/server_admin/view_chart" }, service = MVCResourceCommand.class)
public class ViewChartMVCResourceCommand extends BaseMVCResourceCommand {

    @Override
    protected void doServeResource(ResourceRequest resourceRequest, ResourceResponse resourceResponse)
            throws Exception {

        ThemeDisplay themeDisplay = (ThemeDisplay) resourceRequest.getAttribute(WebKeys.THEME_DISPLAY);

        String type = ParamUtil.getString(resourceRequest, "type", "max");
        long maxMemory = ParamUtil.getLong(resourceRequest, "maxMemory");
        long totalMemory = ParamUtil.getLong(resourceRequest, "totalMemory");
        long usedMemory = ParamUtil.getLong(resourceRequest, "usedMemory");

        ValueDataset valueDataset = null;

        StringBundler sb = new StringBundler(5);

        ResourceBundle resourceBundle = ResourceBundleUtil.getBundle("content.Language", themeDisplay.getLocale(),
                getClass());

        sb.append(ResourceBundleUtil.getString(resourceBundle, "used-memory"));

        sb.append(StringPool.SPACE);
        sb.append(StringPool.FORWARD_SLASH);
        sb.append(StringPool.SPACE);

        if (type.equals("total")) {
            valueDataset = new DefaultValueDataset((usedMemory * 100) / totalMemory);

            sb.append(ResourceBundleUtil.getString(resourceBundle, "total-memory"));
        } else {
            valueDataset = new DefaultValueDataset((usedMemory * 100) / maxMemory);

            sb.append(ResourceBundleUtil.getString(resourceBundle, "maximum-memory"));
        }

        MeterPlot meterPlot = getMeterPlot(themeDisplay, valueDataset);

        JFreeChart jFreeChart = getJFreeChart(sb.toString(), meterPlot);

        resourceResponse.setContentType(ContentTypes.IMAGE_PNG);

        ChartUtilities.writeChartAsPNG(resourceResponse.getPortletOutputStream(), jFreeChart, 280, 180);
    }

    protected JFreeChart getJFreeChart(String title, MeterPlot meterPlot) {
        JFreeChart jFreeChart = new JFreeChart(title, new Font(null, Font.PLAIN, 13), meterPlot, true);

        jFreeChart.removeLegend();
        jFreeChart.setBackgroundPaint(Color.white);

        return jFreeChart;
    }

    protected MeterPlot getMeterPlot(ThemeDisplay themeDisplay, ValueDataset valueDataset) {

        MeterPlot meterPlot = new MeterPlot(valueDataset);

        meterPlot.addInterval(new MeterInterval(themeDisplay.translate("normal"), new Range(0.0D, 75D),
                Color.lightGray, new BasicStroke(2.0F), new Color(0, 255, 0, 64)));

        meterPlot.addInterval(new MeterInterval(themeDisplay.translate("warning"), new Range(75D, 90D),
                Color.lightGray, new BasicStroke(2.0F), new Color(255, 255, 0, 64)));

        meterPlot.addInterval(new MeterInterval(themeDisplay.translate("critical"), new Range(90D, 100D),
                Color.lightGray, new BasicStroke(2.0F), new Color(255, 0, 0, 128)));

        meterPlot.setDialBackgroundPaint(Color.white);
        meterPlot.setDialShape(DialShape.PIE);
        meterPlot.setDialOutlinePaint(Color.gray);
        meterPlot.setTickLabelFont(new Font(null, Font.PLAIN, 10));
        meterPlot.setTickLabelPaint(Color.darkGray);
        meterPlot.setTickLabelsVisible(true);
        meterPlot.setTickPaint(Color.lightGray);
        meterPlot.setTickSize(5D);
        meterPlot.setMeterAngle(180);
        meterPlot.setNeedlePaint(Color.darkGray);
        meterPlot.setRange(new Range(0.0D, 100D));
        meterPlot.setValueFont(new Font(null, Font.PLAIN, 10));
        meterPlot.setValuePaint(Color.black);
        meterPlot.setUnits("%");

        return meterPlot;
    }

}