J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of Sun Microsystems nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | /* |
| 33 | * |
| 34 | * Example of a JConsole Plugin. This loads JTop as a JConsole tab. |
| 35 | * |
| 36 | * @author Mandy Chung |
| 37 | */ |
| 38 | |
| 39 | import java.beans.PropertyChangeEvent; |
| 40 | import java.beans.PropertyChangeListener; |
| 41 | import java.util.LinkedHashMap; |
| 42 | import java.util.Map; |
| 43 | import javax.management.MBeanServerConnection; |
| 44 | import javax.swing.JPanel; |
| 45 | import javax.swing.SwingWorker; |
| 46 | |
| 47 | import com.sun.tools.jconsole.JConsolePlugin; |
| 48 | import com.sun.tools.jconsole.JConsoleContext; |
| 49 | import com.sun.tools.jconsole.JConsoleContext.ConnectionState; |
| 50 | |
| 51 | /** |
| 52 | * JTopPlugin is a subclass to com.sun.tools.jconsole.JConsolePlugin |
| 53 | * |
| 54 | * JTopPlugin is loaded and instantiated by JConsole. One instance |
| 55 | * is created for each window that JConsole creates. It listens to |
| 56 | * the connected property change so that it will update JTop with |
| 57 | * the valid MBeanServerConnection object. JTop is a JPanel object |
| 58 | * displaying the thread and its CPU usage information. |
| 59 | */ |
| 60 | public class JTopPlugin extends JConsolePlugin implements PropertyChangeListener |
| 61 | { |
| 62 | private JTop jtop = null; |
| 63 | private Map<String, JPanel> tabs = null; |
| 64 | |
| 65 | public JTopPlugin() { |
| 66 | // register itself as a listener |
| 67 | addContextPropertyChangeListener(this); |
| 68 | } |
| 69 | |
| 70 | /* |
| 71 | * Returns a JTop tab to be added in JConsole. |
| 72 | */ |
| 73 | public synchronized Map<String, JPanel> getTabs() { |
| 74 | if (tabs == null) { |
| 75 | jtop = new JTop(); |
| 76 | jtop.setMBeanServerConnection( |
| 77 | getContext().getMBeanServerConnection()); |
| 78 | // use LinkedHashMap if you want a predictable order |
| 79 | // of the tabs to be added in JConsole |
| 80 | tabs = new LinkedHashMap<String, JPanel>(); |
| 81 | tabs.put("JTop", jtop); |
| 82 | } |
| 83 | return tabs; |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Returns a SwingWorker which is responsible for updating the JTop tab. |
| 88 | */ |
| 89 | public SwingWorker<?,?> newSwingWorker() { |
| 90 | return jtop.newSwingWorker(); |
| 91 | } |
| 92 | |
| 93 | // You can implement the dispose() method if you need to release |
| 94 | // any resource when the plugin instance is disposed when the JConsole |
| 95 | // window is closed. |
| 96 | // |
| 97 | // public void dispose() { |
| 98 | // } |
| 99 | |
| 100 | /* |
| 101 | * Property listener to reset the MBeanServerConnection |
| 102 | * at reconnection time. |
| 103 | */ |
| 104 | public void propertyChange(PropertyChangeEvent ev) { |
| 105 | String prop = ev.getPropertyName(); |
| 106 | if (prop == JConsoleContext.CONNECTION_STATE_PROPERTY) { |
| 107 | ConnectionState oldState = (ConnectionState)ev.getOldValue(); |
| 108 | ConnectionState newState = (ConnectionState)ev.getNewValue(); |
| 109 | // JConsole supports disconnection and reconnection |
| 110 | // The MBeanServerConnection will become invalid when |
| 111 | // disconnected. Need to use the new MBeanServerConnection object |
| 112 | // created at reconnection time. |
| 113 | if (newState == ConnectionState.CONNECTED && jtop != null) { |
| 114 | jtop.setMBeanServerConnection( |
| 115 | getContext().getMBeanServerConnection()); |
| 116 | } |
| 117 | } |
| 118 | } |
| 119 | } |