JMeter example source code file (Graph.java)

This example JMeter source code file (Graph.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

awt, cachingstatcalculator, dimension, drawing, drawing, graph, graph, graphics, graphics, gui, jcomponent, list, runnable, sample, sample, scrollable, swing, util

The JMeter Graph.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.visualizers;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.util.Iterator;
import java.util.List;

import javax.swing.JComponent;
import javax.swing.Scrollable;
import javax.swing.SwingUtilities;

import org.apache.jmeter.gui.util.JMeterColor;
import org.apache.jmeter.samplers.Clearable;
import org.apache.jorphan.logging.LoggingManager;
import org.apache.log.Logger;

/**
 * Implements a simple graph for displaying performance results.
 *
 */
public class Graph extends JComponent implements Scrollable, Clearable {
    private static final long serialVersionUID = 240L;

    private static final Logger log = LoggingManager.getLoggerForClass();

    private boolean wantData = true;

    private boolean wantAverage = true;

    private boolean wantDeviation = true;

    private boolean wantThroughput = true;

    private boolean wantMedian = true;

    private CachingStatCalculator model;

    private static final int width = 2000;

    private long graphMax = 1;

    private double throughputMax = 1;

    /**
     * Constructor for the Graph object.
     */
    public Graph() {
        this.setPreferredSize(new Dimension(width, 100));
    }

    /**
     * Constructor for the Graph object.
     */
    public Graph(CachingStatCalculator model) {
        this();
        this.model = model;
    }

    /**
     * Gets the PreferredScrollableViewportSize attribute of the Graph object.
     *
     * @return the PreferredScrollableViewportSize value
     */
    public Dimension getPreferredScrollableViewportSize() {
        return this.getPreferredSize();
        // return new Dimension(width, 400);
    }

    /**
     * Gets the ScrollableUnitIncrement attribute of the Graph object.
     *
     * @return the ScrollableUnitIncrement value
     */
    public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
        return 5;
    }

    /**
     * Gets the ScrollableBlockIncrement attribute of the Graph object.
     *
     * @return the ScrollableBlockIncrement value
     */
    public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
        return (int) (visibleRect.width * .9);
    }

    /**
     * Gets the ScrollableTracksViewportWidth attribute of the Graph object.
     *
     * @return the ScrollableTracksViewportWidth value
     */
    public boolean getScrollableTracksViewportWidth() {
        return false;
    }

    /**
     * Gets the ScrollableTracksViewportHeight attribute of the Graph object.
     *
     * @return the ScrollableTracksViewportHeight value
     */
    public boolean getScrollableTracksViewportHeight() {
        return true;
    }

    /**
     * Clears this graph.
     */
    public void clearData() {
        graphMax = 1;
        throughputMax = 1;
    }

    public void enableData(boolean value) {
        this.wantData = value;
    }

    public void enableAverage(boolean value) {
        this.wantAverage = value;
    }

    public void enableMedian(boolean value) {
        this.wantMedian = value;
    }

    public void enableDeviation(boolean value) {
        this.wantDeviation = value;
    }

    public void enableThroughput(boolean value) {
        this.wantThroughput = value;
    }

    public void updateGui(final Sample oneSample) {
        long h = model.getPercentPoint((float) 0.90).longValue();
        boolean repaint = false;
        if ((oneSample.getCount() % 20 == 0 || oneSample.getCount() < 20) && h > (graphMax * 1.2) || graphMax > (h * 1.2)) {
            if (h >= 1) {
                graphMax = h;
            } else {
                graphMax = 1;
            }
            repaint = true;
        }
        if (model.getMaxThroughput() > throughputMax) {
            throughputMax = model.getMaxThroughput() * 1.3;
            repaint = true;
        }
        if (repaint) {
            repaint();
            return;
        }
        final int xPos = model.getCount();

        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                Graphics g = getGraphics();

                if (g != null) {
                    drawSample(xPos, oneSample, g);
                }
            }
        });
    }

    /** {@inheritDoc}} */
    @Override
    public void paintComponent(Graphics g) {
        super.paintComponent(g);

        List<Sample> samples = model.getSamples();
        synchronized (samples ) {
            Iterator<Sample> e = samples.iterator();

            for (int i = 0; e.hasNext(); i++) {
                Sample s = e.next();

                drawSample(i, s, g);
            }
        }
    }

    private void drawSample(int x, Sample oneSample, Graphics g) {
        // int width = getWidth();
        int height = getHeight();
        log.debug("Drawing a sample at " + x);
        if (wantData) {
            int data = (int) (oneSample.getData() * height / graphMax);

            if (oneSample.isSuccess()) {
                g.setColor(Color.black);
            } else {
                g.setColor(JMeterColor.YELLOW);
            }
            g.drawLine(x % width, height - data, x % width, height - data - 1);
            if (log.isDebugEnabled()) {
                log.debug("Drawing coords = " + (x % width) + "," + (height - data));
            }
        }

        if (wantAverage) {
            int average = (int) (oneSample.getAverage() * height / graphMax);

            g.setColor(Color.blue);
            g.drawLine(x % width, height - average, x % width, (height - average - 1));
        }

        if (wantMedian) {
            int median = (int) (oneSample.getMedian() * height / graphMax);

            g.setColor(JMeterColor.purple);
            g.drawLine(x % width, height - median, x % width, (height - median - 1));
        }

        if (wantDeviation) {
            int deviation = (int) (oneSample.getDeviation() * height / graphMax);

            g.setColor(Color.red);
            g.drawLine(x % width, height - deviation, x % width, (height - deviation - 1));
        }
        if (wantThroughput) {
            int throughput = (int) (oneSample.getThroughput() * height / throughputMax);

            g.setColor(JMeterColor.dark_green);
            g.drawLine(x % width, height - throughput, x % width, (height - throughput - 1));
        }
    }

    /**
     * @return Returns the graphMax.
     */
    public long getGraphMax() {
        return graphMax;
    }
}