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   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
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  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  *
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  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
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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   @modules java.desktop/sun.awt
  32 */
  33 
  34 import sun.awt.SunToolkit;
  35 
  36 import javax.swing.*;
  37 import java.awt.*;
  38 import java.util.concurrent.CountDownLatch;
  39 import java.util.concurrent.atomic.AtomicReference;
  40 
  41 public class bug8043610 {
  42     private static volatile JFrame frame;
  43     private static volatile JComponent component;
  44 
  45     public static void main(String[] args) throws Exception {
  46         ThreadGroup stubTG = new ThreadGroup(getRootThreadGroup(), "Stub Thread Group");
  47         ThreadGroup swingTG = new ThreadGroup(getRootThreadGroup(), "SwingTG");
  48         try {
  49             Thread stubThread = new Thread(stubTG, SunToolkit::createNewAppContext);
  50             stubThread.start();
  51             stubThread.join();
  52 
  53             CountDownLatch startSwingLatch = new CountDownLatch(1);
  54             new Thread(swingTG, () -> {
  55                 SunToolkit.createNewAppContext();
  56                 SwingUtilities.invokeLater(() -> {
  57                     frame = new JFrame();
  58                     component = new JLabel("Test Text");
  59                     frame.add(component);
  60                     frame.setBounds(100, 100, 100, 100);
  61                     frame.setVisible(true);
  62                     startSwingLatch.countDown();
  63                 });
  64             }).start();
  65             startSwingLatch.await();
  66 
  67             AtomicReference<Exception> caughtException = new AtomicReference<>();
  68             Thread checkThread = new Thread(getRootThreadGroup(), () -> {
  69                 try {
  70                     component.invalidate();
  71                     component.revalidate();
  72                     component.repaint(new Rectangle(0, 0, 0, 0));
  73                 } catch (Exception e) {
  74                     caughtException.set(e);
  75                 }
  76             });
  77             checkThread.start();
  78             checkThread.join();
  79 
  80             if (caughtException.get() != null) {
  81                 throw new RuntimeException("Failed. Caught exception!", caughtException.get());
  82             }
  83         } finally {
  84             new Thread(swingTG, () -> SwingUtilities.invokeLater(() -> {
  85                 if (frame != null) {
  86                     frame.dispose();
  87                 }
  88             })).start();
  89         }
  90     }
  91 
  92     private static ThreadGroup getRootThreadGroup() {
  93         ThreadGroup currentTG = Thread.currentThread().getThreadGroup();
  94         ThreadGroup parentTG = currentTG.getParent();
  95         while (parentTG != null) {
  96             currentTG = parentTG;
  97             parentTG = currentTG.getParent();
  98         }
  99         return currentTG;
 100     }
 101 }