JMeter example source code file (MonitorHealthPanel.java)

This example JMeter source code file (MonitorHealthPanel.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, hashmap, info_a, info_load, jlabel, jlabel, jpanel, monitorhealthpanel, non-nls-1, non-nls-1, serverpanel, serverpanel, string, string, swing, util

The JMeter MonitorHealthPanel.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.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JPanel;

import java.util.HashMap;

import javax.swing.JScrollPane;

import org.apache.jmeter.util.JMeterUtils;
import org.apache.jmeter.samplers.Clearable;

/**
 * The health panel is responsible for showing the health of the servers. It
 * only uses the most current information to show the status.
 */
public class MonitorHealthPanel extends JPanel implements MonitorListener, Clearable {
    private static final long serialVersionUID = 240L;

    private final HashMap<String, ServerPanel> serverPanelMap = new HashMap();

    private JPanel servers = null;

    private final MonitorAccumModel model;

    private JScrollPane serverScrollPane = null;

    // NOTUSED Font plainText = new Font("plain", Font.PLAIN, 9);
    // These must not be static, otherwise Language change does not work
    private final String INFO_H = JMeterUtils.getResString("monitor_equation_healthy"); //$NON-NLS-1$

    private final String INFO_A = JMeterUtils.getResString("monitor_equation_active"); //$NON-NLS-1$

    private final String INFO_W = JMeterUtils.getResString("monitor_equation_warning"); //$NON-NLS-1$

    private final String INFO_D = JMeterUtils.getResString("monitor_equation_dead"); //$NON-NLS-1$

    private final String INFO_LOAD = JMeterUtils.getResString("monitor_equation_load"); //$NON-NLS-1$

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

    /**
     *
     */
    public MonitorHealthPanel(MonitorAccumModel model) {
        this.model = model;
        this.model.addListener(this);
        init();
    }

    /**
     * init is responsible for creating the necessary legends and information
     * for the health panel.
     */
    private void init() {// called from ctor, so must not be overridable
        this.setLayout(new BorderLayout());
        ImageIcon legend = JMeterUtils.getImage("monitor-legend.gif"); // I18N: Contains fixed English text ...
        JLabel label = new JLabel(legend);
        label.setPreferredSize(new Dimension(550, 25));
        this.add(label, BorderLayout.NORTH);

        this.servers = new JPanel();
        this.servers.setLayout(new BoxLayout(servers, BoxLayout.Y_AXIS));
        this.servers.setAlignmentX(Component.LEFT_ALIGNMENT);

        serverScrollPane = new JScrollPane(this.servers);
        serverScrollPane.setPreferredSize(new Dimension(300, 300));
        this.add(serverScrollPane, BorderLayout.CENTER);

        // the equations
        String eqstring1 = " " + INFO_H + "   |   " + INFO_A;
        String eqstring2 = " " + INFO_W + "   |   " + INFO_D;
        String eqstring3 = " " + INFO_LOAD;
        JLabel eqs = new JLabel();
        eqs.setLayout(new BorderLayout());
        eqs.setPreferredSize(new Dimension(500, 60));
        eqs.add(new JLabel(eqstring1), BorderLayout.NORTH);
        eqs.add(new JLabel(eqstring2), BorderLayout.CENTER);
        eqs.add(new JLabel(eqstring3), BorderLayout.SOUTH);
        this.add(eqs, BorderLayout.SOUTH);
    }

    /**
     *
     * @param model
     */
    public void addSample(MonitorModel model) {
        if (serverPanelMap.containsKey(model.getURL())) {
            ServerPanel pane = null;
            if (serverPanelMap.get(model.getURL()) != null) {
                pane = serverPanelMap.get((model.getURL()));
            } else {
                pane = new ServerPanel(model);
                serverPanelMap.put(model.getURL(), pane);
            }
            pane.updateGui(model);
        } else {
            ServerPanel newpane = new ServerPanel(model);
            serverPanelMap.put(model.getURL(), newpane);
            this.servers.add(newpane);
            newpane.updateGui(model);
        }
        this.servers.updateUI();
    }

    /**
     * clear will clear the hashmap, remove all ServerPanels from the servers
     * pane, and update the ui.
     */
    public void clearData() {
        this.serverPanelMap.clear();
        this.servers.removeAll();
        this.servers.updateUI();
    }
}