1 /*

     2  * Copyright 2004-2006 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 package sun.tools.jconsole;

    27 

    28 import java.awt.*;

    29 import java.awt.event.*;

    30 import java.beans.*;

    31 

    32 import javax.swing.*;

    33 

    34 public abstract class Tab extends JPanel {

    35     private String name;

    36     private Worker worker;

    37 

    38     protected VMPanel vmPanel;

    39 

    40     private SwingWorker<?, ?> prevSW;

    41 

    42     public Tab(VMPanel vmPanel, String name) {

    43         this.vmPanel = vmPanel;

    44         this.name = name;

    45     }

    46 

    47     public SwingWorker<?, ?> newSwingWorker() {

    48         return null;

    49     }

    50 

    51     public void update() {

    52         final ProxyClient proxyClient = vmPanel.getProxyClient();

    53         if (!proxyClient.hasPlatformMXBeans()) {

    54             throw new UnsupportedOperationException(

    55                 "Platform MXBeans not registered in MBeanServer");

    56         }

    57 

    58         SwingWorker<?,?> sw = newSwingWorker();

    59         // schedule SwingWorker to run only if the previous

    60         // SwingWorker has finished its task and it hasn't started.

    61         if (prevSW == null || prevSW.isDone()) {

    62             if (sw == null || sw.getState() == SwingWorker.StateValue.PENDING) {

    63                 prevSW = sw;

    64                 if (sw != null) {

    65                     sw.execute();

    66                 }

    67             }

    68         }

    69     }

    70 

    71     public synchronized void dispose() {

    72         if(worker != null)

    73             worker.stopWorker();

    74 

    75         // Subclasses will override to clean up

    76     }

    77 

    78     protected VMPanel getVMPanel() {

    79         return vmPanel;

    80     }

    81 

    82     OverviewPanel[] getOverviewPanels() {

    83         return null;

    84     }

    85 

    86     public synchronized void workerAdd(Runnable job) {

    87         if (worker == null) {

    88             worker = new Worker(name+"-"+vmPanel.getConnectionName());

    89             worker.start();

    90         }

    91         worker.add(job);

    92     }

    93 

    94     public Dimension getPreferredSize() {

    95         return new Dimension(700, 500);

    96     }

    97 }