| /* |
| * Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * - Neither the name of Oracle nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* |
| * |
| * Example of a JConsole Plugin. This loads JTop as a JConsole tab. |
| * |
| * @author Mandy Chung |
| */ |
| |
| import java.beans.PropertyChangeEvent; |
| import java.beans.PropertyChangeListener; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import javax.management.MBeanServerConnection; |
| import javax.swing.JPanel; |
| import javax.swing.SwingWorker; |
| |
| import com.sun.tools.jconsole.JConsolePlugin; |
| import com.sun.tools.jconsole.JConsoleContext; |
| import com.sun.tools.jconsole.JConsoleContext.ConnectionState; |
| |
| /** |
| * JTopPlugin is a subclass to com.sun.tools.jconsole.JConsolePlugin |
| * |
| * JTopPlugin is loaded and instantiated by JConsole. One instance |
| * is created for each window that JConsole creates. It listens to |
| * the connected property change so that it will update JTop with |
| * the valid MBeanServerConnection object. JTop is a JPanel object |
| * displaying the thread and its CPU usage information. |
| */ |
| public class JTopPlugin extends JConsolePlugin implements PropertyChangeListener |
| { |
| private JTop jtop = null; |
| private Map<String, JPanel> tabs = null; |
| |
| public JTopPlugin() { |
| // register itself as a listener |
| addContextPropertyChangeListener(this); |
| } |
| |
| /* |
| * Returns a JTop tab to be added in JConsole. |
| */ |
| public synchronized Map<String, JPanel> getTabs() { |
| if (tabs == null) { |
| jtop = new JTop(); |
| jtop.setMBeanServerConnection( |
| getContext().getMBeanServerConnection()); |
| // use LinkedHashMap if you want a predictable order |
| // of the tabs to be added in JConsole |
| tabs = new LinkedHashMap<String, JPanel>(); |
| tabs.put("JTop", jtop); |
| } |
| return tabs; |
| } |
| |
| /* |
| * Returns a SwingWorker which is responsible for updating the JTop tab. |
| */ |
| public SwingWorker<?,?> newSwingWorker() { |
| return jtop.newSwingWorker(); |
| } |
| |
| // You can implement the dispose() method if you need to release |
| // any resource when the plugin instance is disposed when the JConsole |
| // window is closed. |
| // |
| // public void dispose() { |
| // } |
| |
| /* |
| * Property listener to reset the MBeanServerConnection |
| * at reconnection time. |
| */ |
| public void propertyChange(PropertyChangeEvent ev) { |
| String prop = ev.getPropertyName(); |
| if (prop == JConsoleContext.CONNECTION_STATE_PROPERTY) { |
| ConnectionState oldState = (ConnectionState)ev.getOldValue(); |
| ConnectionState newState = (ConnectionState)ev.getNewValue(); |
| // JConsole supports disconnection and reconnection |
| // The MBeanServerConnection will become invalid when |
| // disconnected. Need to use the new MBeanServerConnection object |
| // created at reconnection time. |
| if (newState == ConnectionState.CONNECTED && jtop != null) { |
| jtop.setMBeanServerConnection( |
| getContext().getMBeanServerConnection()); |
| } |
| } |
| } |
| } |