1 /*

     2  * Copyright (c) 2014, Oracle and/or its affiliates. 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.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

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    23 

    24 

    25 /*

    26   @test

    27   @bug 8043610

    28   @summary Tests that JComponent invalidate, revalidate and repaint methods could

    29            be called from any thread

    30   @author Petr Pchelko

    31 */

    32 

    33 import sun.awt.SunToolkit;

    34 

    35 import javax.swing.*;

    36 import java.awt.*;

    37 import java.util.concurrent.CountDownLatch;

    38 import java.util.concurrent.atomic.AtomicReference;

    39 

    40 public class bug8043610 {

    41     private static volatile JFrame frame;

    42     private static volatile JComponent component;

    43 

    44     public static void main(String[] args) throws Exception {

    45         ThreadGroup stubTG = new ThreadGroup(getRootThreadGroup(), "Stub Thread Group");

    46         ThreadGroup swingTG = new ThreadGroup(getRootThreadGroup(), "SwingTG");

    47         try {

    48             Thread stubThread = new Thread(stubTG, SunToolkit::createNewAppContext);

    49             stubThread.start();

    50             stubThread.join();

    51 

    52             CountDownLatch startSwingLatch = new CountDownLatch(1);

    53             new Thread(swingTG, () -> {

    54                 SunToolkit.createNewAppContext();

    55                 SwingUtilities.invokeLater(() -> {

    56                     frame = new JFrame();

    57                     component = new JLabel("Test Text");

    58                     frame.add(component);

    59                     frame.setBounds(100, 100, 100, 100);

    60                     frame.setVisible(true);

    61                     startSwingLatch.countDown();

    62                 });

    63             }).start();

    64             startSwingLatch.await();

    65 

    66             AtomicReference<Exception> caughtException = new AtomicReference<>();

    67             Thread checkThread = new Thread(getRootThreadGroup(), () -> {

    68                 try {

    69                     component.invalidate();

    70                     component.revalidate();

    71                     component.repaint(new Rectangle(0, 0, 0, 0));

    72                 } catch (Exception e) {

    73                     caughtException.set(e);

    74                 }

    75             });

    76             checkThread.start();

    77             checkThread.join();

    78 

    79             if (caughtException.get() != null) {

    80                 throw new RuntimeException("Failed. Caught exception!", caughtException.get());

    81             }

    82         } finally {

    83             new Thread(swingTG, () -> SwingUtilities.invokeLater(() -> {

    84                 if (frame != null) {

    85                     frame.dispose();

    86                 }

    87             })).start();

    88         }

    89     }

    90 

    91     private static ThreadGroup getRootThreadGroup() {

    92         ThreadGroup currentTG = Thread.currentThread().getThreadGroup();

    93         ThreadGroup parentTG = currentTG.getParent();

    94         while (parentTG != null) {

    95             currentTG = parentTG;

    96             parentTG = currentTG.getParent();

    97         }

    98         return currentTG;

    99     }

   100 }