JMeter example source code file (ServerPanel.java)

This example JMeter source code file (ServerPanel.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, dimension, gui, healthy, imageicon, imageicon, jlabel, jlabel, load_0, load_2, load_4, load_5, load_6, serverpanel, serverpanel, swing, warning

The JMeter ServerPanel.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.Dimension;
import java.awt.FlowLayout;

import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JLabel;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.monitor.util.Stats;

/**
 * The purpose of ServerPanel is to display an unique server and its current
 * status. The server label consist of the protocol, host and port. For example,
 * a system with multiple Tomcat's running on different ports would be different
 * ServerPanel.
 */
public class ServerPanel extends JPanel implements MonitorGuiListener {

    private static final long serialVersionUID = 240L;

    private JLabel serverField;

    private JLabel timestampField;

    /**
     * Preference size for the health icon
     */
    private Dimension prefsize = new Dimension(25, 75);

    private JLabel healthIcon;

    private JLabel loadIcon;

    /**
     * Health Icons
     */
    private static final ImageIcon HEALTHY = JMeterUtils.getImage("monitor-healthy.gif");

    private static final ImageIcon ACTIVE = JMeterUtils.getImage("monitor-active.gif");

    private static final ImageIcon WARNING = JMeterUtils.getImage("monitor-warning.gif");

    private static final ImageIcon DEAD = JMeterUtils.getImage("monitor-dead.gif");

    /**
     * Load Icons
     */
    private static final ImageIcon LOAD_0 = JMeterUtils.getImage("monitor-load-0.gif");

    private static final ImageIcon LOAD_1 = JMeterUtils.getImage("monitor-load-1.gif");

    private static final ImageIcon LOAD_2 = JMeterUtils.getImage("monitor-load-2.gif");

    private static final ImageIcon LOAD_3 = JMeterUtils.getImage("monitor-load-3.gif");

    private static final ImageIcon LOAD_4 = JMeterUtils.getImage("monitor-load-4.gif");

    private static final ImageIcon LOAD_5 = JMeterUtils.getImage("monitor-load-5.gif");

    private static final ImageIcon LOAD_6 = JMeterUtils.getImage("monitor-load-6.gif");

    private static final ImageIcon LOAD_7 = JMeterUtils.getImage("monitor-load-7.gif");

    private static final ImageIcon LOAD_8 = JMeterUtils.getImage("monitor-load-8.gif");

    private static final ImageIcon LOAD_9 = JMeterUtils.getImage("monitor-load-9.gif");

    private static final ImageIcon LOAD_10 = JMeterUtils.getImage("monitor-load-10.gif");

    // private MonitorModel DATA;

    /**
     *
     */
    public ServerPanel(MonitorModel model) {
        super();
        // DATA = model;
        init(model);
    }

    /**
     *
     * @deprecated Only for use in unit testing
     */
    @Deprecated
    public ServerPanel() {
        // log.warn("Only for use in unit testing");
    }

    /**
     * Init will create the JLabel widgets for the host, health, load and
     * timestamp.
     *
     * @param model
     */
    private void init(MonitorModel model) {
        this.setLayout(new FlowLayout());
        serverField = new JLabel(model.getURL());
        this.add(serverField);
        healthIcon = new JLabel(getHealthyImageIcon(model.getHealth()));
        healthIcon.setPreferredSize(prefsize);
        this.add(healthIcon);
        loadIcon = new JLabel(getLoadImageIcon(model.getLoad()));
        this.add(loadIcon);
        timestampField = new JLabel(model.getTimestampString());
        this.add(timestampField);
    }

    /**
     * Static method for getting the right ImageIcon for the health.
     *
     * @param health
     * @return image for the status
     */
    private static ImageIcon getHealthyImageIcon(int health) {
        ImageIcon i = null;
        switch (health) {
        case Stats.HEALTHY:
            i = HEALTHY;
            break;
        case Stats.ACTIVE:
            i = ACTIVE;
            break;
        case Stats.WARNING:
            i = WARNING;
            break;
        case Stats.DEAD:
            i = DEAD;
            break;
        }
        return i;
    }

    /**
     * Static method looks up the right ImageIcon from the load value.
     *
     * @param load
     * @return image for the load
     */
    private static ImageIcon getLoadImageIcon(int load) {
        if (load == 0) {
            return LOAD_0;
        } else if (load > 0 && load <= 10) {
            return LOAD_1;
        } else if (load > 10 && load <= 20) {
            return LOAD_2;
        } else if (load > 20 && load <= 30) {
            return LOAD_3;
        } else if (load > 30 && load <= 40) {
            return LOAD_4;
        } else if (load > 40 && load <= 50) {
            return LOAD_5;
        } else if (load > 50 && load <= 60) {
            return LOAD_6;
        } else if (load > 60 && load <= 70) {
            return LOAD_7;
        } else if (load > 70 && load <= 80) {
            return LOAD_8;
        } else if (load > 80 && load <= 90) {
            return LOAD_9;
        } else {
            return LOAD_10;
        }
    }

    /**
     * Method will update the ServerPanel's health, load, and timestamp. For
     * efficiency, it uses the static method to lookup the images.
     */
    public void updateGui(MonitorModel stat) {
        // this.DATA = null;
        // this.DATA = stat;
        loadIcon.setIcon(getLoadImageIcon(stat.getLoad()));
        healthIcon.setIcon(getHealthyImageIcon(stat.getHealth()));
        timestampField.setText(stat.getTimestampString());
        this.updateGui();
    }

    /**
     * update the gui
     */
    public void updateGui() {
        this.repaint();
    }
}