JMeter example source code file (BarChart.java)

This example JMeter source code file (BarChart.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

abstractchart, arraylist, arraylist, awt, axisgraph, axisgraph, barchart, dimension, gui, image, jcomponent, jcomponent, override, report_bar_chart_url, samplingstatcalculator, string, string, swing, util

The JMeter BarChart.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.jmeter.testelement;

import java.awt.Dimension;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import javax.swing.JComponent;

import org.apache.jmeter.report.DataSet;
import org.apache.jmeter.visualizers.AxisGraph;
import org.apache.jmeter.visualizers.SamplingStatCalculator;

/**
 * The class is reponsible for returning
 *
 */
public class BarChart extends AbstractChart {

    private static final long serialVersionUID = 240L;

    public static final String REPORT_BAR_CHART_URL = "ReportChart.bar.chart.url";

    public BarChart() {
        super();
    }

    public String getURL() {
        return getPropertyAsString(REPORT_BAR_CHART_URL);
    }

    public void setURL(String url) {
        setProperty(REPORT_BAR_CHART_URL,url);
    }

    /**
     * Convert the data from SamplingStatCalculator to double array of array
     * @param data
     * @return data values
     */
    public double[][] convertToDouble(List<SamplingStatCalculator> data) {
        double[][] dataset = new double[1][data.size()];
        //Iterator itr = data.iterator();
        for (int idx=0; idx < data.size(); idx++) {
            SamplingStatCalculator stat = data.get(idx);
            dataset[0][idx] = getValue(stat);
        }
        return dataset;
    }

    @Override
    public JComponent renderChart(List<DataSet> data) {
        ArrayList<SamplingStatCalculator> dset = new ArrayList();
        ArrayList<String> xlabels = new ArrayList();
        Iterator<DataSet> itr = data.iterator();
        while (itr.hasNext()) {
            DataSet item = itr.next();
            SamplingStatCalculator ss = item.getStatistics(this.getURL());
            if (ss != null) {
                // we add the entry
                dset.add(ss);
                if ( getXLabel().equals(X_DATA_FILENAME_LABEL) ) {
                    xlabels.add(item.getDataSourceName());
                } else {
                    xlabels.add(item.getMonthDayYearDate());
                }
            }
        }
        double[][] dbset = convertToDouble(dset);
        return renderGraphics(dbset, xlabels.toArray(new String[xlabels.size()]));
    }

    public JComponent renderGraphics(double[][] data, String[] xAxisLabels) {
        AxisGraph panel = new AxisGraph();
        panel.setTitle(this.getTitle());
        panel.setData(data);
        panel.setXAxisLabels(xAxisLabels);
        panel.setYAxisLabels(this.getYLabel());
        panel.setXAxisTitle(this.getFormattedXAxis());
        panel.setYAxisTitle(this.getYAxis());
        // we should make this configurable eventually
        int width = getWidth();
        int height = getHeight();
        panel.setPreferredSize(new Dimension(width,height));
        panel.setSize(new Dimension(width,height));
        panel.setWidth(width);
        panel.setHeight(width);
        setBufferedImage(new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB));
        panel.paintComponent(this.getBufferedImage().createGraphics());
        return panel;
    }

}