1 /*
2 * Copyright (c) 2018, 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 8152974
27 * @key headful
28 * @summary AWT hang occurrs when sequenced events arrive out of sequence
29 * @run main SequencedEventTest
30 */
31 //import sun.awt.AppContext;
32 //import sun.awt.SunToolkit;
33
34 import sun.awt.AppContext;
35 import sun.awt.SunToolkit;
36
37 import java.awt.Robot;
38 import java.awt.Point;
39 import java.awt.Dimension;
40 import java.awt.FlowLayout;
41 import java.awt.AWTEvent;
42 import java.awt.Toolkit;
43 import java.awt.event.ActionEvent;
44 import java.awt.event.ActionListener;
45 import java.awt.event.InputEvent;
46 import java.lang.reflect.Constructor;
47 import java.util.concurrent.CountDownLatch;
48
49 import javax.swing.JFrame;
50 import javax.swing.JButton;
51 import javax.swing.SwingUtilities;
52 import javax.swing.JTextArea;
53
54 public class SequencedEventTest extends JFrame implements ActionListener {
55 private JButton spamMeButton;
56 private static Robot robot;
57 private static SequencedEventTest window;
58 private static AppContext context;
59
60 public static void main(String[] args) throws Exception {
61 SwingUtilities.invokeAndWait(() -> {
62 window = new SequencedEventTest();
63 window.setVisible(true);
64 });
65
66 robot = new Robot();
67 robot.waitForIdle();
68
69 Point pt = window.spamMeButton.getLocationOnScreen();
70 Dimension d = window.spamMeButton.getSize();
71
72 robot.mouseMove(pt.x + d.width / 2, pt.y + d.height / 2);
73 robot.waitForIdle();
74 robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
75 robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
76 /*
77 *Cannot have robot.waitForIdle() here since it will block the test forever,
78 * in the case of failure and the test will timeout.
79 */
80
81 try {
82 /*
83 * Wait for 2 seconds, and then see if all the sequenced events are dispatched.
84 */
85 Thread.sleep(2000);
86 AWTEvent ev = Toolkit.getDefaultToolkit().getSystemEventQueue().
87 peekEvent(java.awt.event.FocusEvent.FOCUS_LAST + 1);
88
89 if (ev != null)
90 throw new RuntimeException("Test case failed!");
91 } catch (InterruptedException e) {
92 throw new RuntimeException("Test case failed." + e.getMessage());
93 }
94
95 /*
96 * In the case of failure, the cleanup job cannot be executed, since it
97 * will block the test.
98 */
99 System.out.println("Test case succeeded.");
100 context.dispose();
101 SwingUtilities.invokeAndWait(() -> window.dispose());
102 }
103
104 public SequencedEventTest() {
105 super("Test Window");
106
107 setLayout(new FlowLayout());
108 JTextArea textBlock = new JTextArea("Lorem ipsum dolor sit amet...");
109 add(textBlock);
110
111 spamMeButton = new JButton("Press me!");
112 spamMeButton.addActionListener(this);
113 add(spamMeButton);
114 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
115 pack();
116 }
117
118 @Override
119 public void actionPerformed(ActionEvent e) {
120 if(e.getSource() == spamMeButton) {
121 AWTEvent eventOne = getSequencedEvent();
122 ThreadGroup tg = new ThreadGroup("TestThreadGroup" );
123 CountDownLatch latch = new CountDownLatch(1);
124 Thread t = new Thread(tg, () -> {
125 context = SunToolkit.createNewAppContext();
126 AWTEvent eventTwo = getSequencedEvent();
127 AWTEvent eventThree = getSequencedEvent();
128
129 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventTwo);
130 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 0, null));
131 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 1, null));
132 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventThree);
133
134 latch.countDown();
135 });
136
137 t.start();
138 try {
139 latch.await();
140 }catch (InterruptedException ex) {
141 throw new RuntimeException("Test case failed.");
142 }
143 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventOne);
144
145 try {
146 t.join();
147 } catch (InterruptedException ex) {
148 throw new RuntimeException("Test case failed.");
149 }
150 }
151 }
152
153 private AWTEvent getSequencedEvent()
154 {
155 AWTEvent wrapMe = new AWTEvent(this, AWTEvent.RESERVED_ID_MAX) {};
156
157 try {
158 /*
159 * SequencedEvent is a package private class, which cannot be instantiated
160 * by importing. So use reflection to create an instance.
161 */
162 Class<? extends AWTEvent> seqClass = (Class<? extends AWTEvent>) Class.forName("java.awt.SequencedEvent");
163 Constructor<? extends AWTEvent> seqConst = seqClass.getConstructor(AWTEvent.class);
164 seqConst.setAccessible(true);
165 return seqConst.newInstance(wrapMe);
166 } catch (Throwable err) {
167 throw new RuntimeException("Unable to instantiate SequencedEvent",err);
168 }
169 }
170 }