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.
  22  */
  23 
  24 /*
  25   @test
  26   @bug 8031694
  27   @summary [macosx] TwentyThousandTest test intermittently hangs
  28   @author Oleg Pekhovskiy
  29   @run main EDTShutdownTest
  30  */
  31 
  32 import java.awt.EventQueue;
  33 import java.awt.Toolkit;
  34 import java.lang.reflect.InvocationTargetException;
  35 import java.lang.reflect.Method;
  36 import sun.awt.AWTAccessor;
  37 
  38 public class EDTShutdownTest {
  39 
  40     private static boolean passed = false;
  41 
  42     public static void main(String[] args) {
  43         // Force EDT start with InvocationEvent
  44         EventQueue.invokeLater(() -> {
  45             // EventQueue is empty now
  46             EventQueue queue = Toolkit.getDefaultToolkit()
  47                     .getSystemEventQueue();
  48             Thread thread = AWTAccessor.getEventQueueAccessor()
  49                     .getDispatchThread(queue);
  50             try {
  51                 /*
  52                  * Clear EventDispatchThread.doDispatch flag to break message
  53                  * loop in EventDispatchThread.pumpEventsForFilter()
  54                  */
  55                 Method stopDispatching = thread.getClass()
  56                         .getDeclaredMethod("stopDispatching", null);
  57                 stopDispatching.setAccessible(true);
  58                 stopDispatching.invoke(thread, null);
  59 
  60                 /*
  61                  * Post another InvocationEvent that MUST be handled before
  62                  * EDT shutdown
  63                  */
  64                 EventQueue.invokeLater(() -> {
  65                     passed = true;
  66                 });
  67             }
  68             catch (InvocationTargetException | NoSuchMethodException 
  69                     | IllegalAccessException e) {
  70             }
  71         });
  72 
  73         // Wait for EDT shutdown
  74         EventQueue queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
  75         Thread thread = AWTAccessor.getEventQueueAccessor()
  76                 .getDispatchThread(queue);
  77         try {
  78             thread.join();
  79         }
  80         catch (InterruptedException e) {
  81         }
  82 
  83         if (passed) {
  84             System.out.println("Test PASSED!");
  85         }
  86         else {
  87             throw new RuntimeException("Test FAILED!");
  88         }
  89     }
  90 }