cloud.requestengine.ResponseTimeService.java Source code

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Here is the source code for cloud.requestengine.ResponseTimeService.java

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/**
 * Copyright 2011 Amir Moulavi (amir.moulavi@gmail.com)
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package cloud.requestengine;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.PlotOrientation;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.xy.XYDataset;
import org.jfree.data.xy.XYSeries;
import org.jfree.data.xy.XYSeriesCollection;

import java.awt.*;
import java.awt.geom.Rectangle2D;
import java.util.List;

/**
 * 
 * @author Amir Moulavi
 * @date 2011-04-02
 *
 */

public class ResponseTimeService {

    private static ResponseTimeService instance = new ResponseTimeService();
    private XYSeries series = new XYSeries("ResponseTime");
    private Long start = System.currentTimeMillis();

    public static ResponseTimeService getInstance() {
        return instance;
    }

    private ResponseTimeService() {

    }

    public void add(List<RequestStatistic> completedRequest) {
        for (RequestStatistic rs : completedRequest) {
            series.add(rs.getEnd() - start, rs.getResponseTime());
        }
    }

    public JFreeChart getChart() {
        JFreeChart chart = ChartFactory.createScatterPlot("Response Time", "Time (ms)", "ResponseTime (ms)",
                getDataset(), PlotOrientation.VERTICAL, true, true, false);
        final XYPlot plot = chart.getXYPlot();
        final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer();
        renderer.setSeriesLinesVisible(0, false);
        renderer.setSeriesShapesVisible(1, false);

        Shape shape = new Rectangle2D.Double(-1, -1, 2, 2);
        renderer.setSeriesShape(0, shape);

        plot.setRenderer(renderer);

        return chart;
    }

    private XYDataset getDataset() {
        XYSeriesCollection dataSet = new XYSeriesCollection();
        dataSet.addSeries(series);
        return dataSet;
    }

}