1 /*
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   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
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  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  * @key headful
  28  * @bug 8043610
  29  * @summary Tests that JComponent invalidate, revalidate and repaint methods could
  30  *          be called from any thread
  31  * @author Petr Pchelko
  32  * @modules java.desktop/sun.awt
  33  */
  34 
  35 import sun.awt.SunToolkit;
  36 
  37 import javax.swing.*;
  38 import java.awt.*;
  39 import java.util.concurrent.CountDownLatch;
  40 import java.util.concurrent.atomic.AtomicReference;
  41 
  42 public class bug8043610 {
  43     private static volatile JFrame frame;
  44     private static volatile JComponent component;
  45 
  46     public static void main(String[] args) throws Exception {
  47         ThreadGroup stubTG = new ThreadGroup(getRootThreadGroup(), "Stub Thread Group");
  48         ThreadGroup swingTG = new ThreadGroup(getRootThreadGroup(), "SwingTG");
  49         try {
  50             Thread stubThread = new Thread(stubTG, SunToolkit::createNewAppContext);
  51             stubThread.start();
  52             stubThread.join();
  53 
  54             CountDownLatch startSwingLatch = new CountDownLatch(1);
  55             new Thread(swingTG, () -> {
  56                 SunToolkit.createNewAppContext();
  57                 SwingUtilities.invokeLater(() -> {
  58                     frame = new JFrame();
  59                     component = new JLabel("Test Text");
  60                     frame.add(component);
  61                     frame.setBounds(100, 100, 100, 100);
  62                     frame.setVisible(true);
  63                     startSwingLatch.countDown();
  64                 });
  65             }).start();
  66             startSwingLatch.await();
  67 
  68             AtomicReference<Exception> caughtException = new AtomicReference<>();
  69             Thread checkThread = new Thread(getRootThreadGroup(), () -> {
  70                 try {
  71                     component.invalidate();
  72                     component.revalidate();
  73                     component.repaint(new Rectangle(0, 0, 0, 0));
  74                 } catch (Exception e) {
  75                     caughtException.set(e);
  76                 }
  77             });
  78             checkThread.start();
  79             checkThread.join();
  80 
  81             if (caughtException.get() != null) {
  82                 throw new RuntimeException("Failed. Caught exception!", caughtException.get());
  83             }
  84         } finally {
  85             new Thread(swingTG, () -> SwingUtilities.invokeLater(() -> {
  86                 if (frame != null) {
  87                     frame.dispose();
  88                 }
  89             })).start();
  90         }
  91     }
  92 
  93     private static ThreadGroup getRootThreadGroup() {
  94         ThreadGroup currentTG = Thread.currentThread().getThreadGroup();
  95         ThreadGroup parentTG = currentTG.getParent();
  96         while (parentTG != null) {
  97             currentTG = parentTG;
  98             parentTG = currentTG.getParent();
  99         }
 100         return currentTG;
 101     }
 102 }