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 java.awt.Robot;
35 import java.awt.Point;
36 import java.awt.Dimension;
37 import java.awt.FlowLayout;
38 import java.awt.AWTEvent;
39 import java.awt.Toolkit;
40 import java.awt.event.ActionEvent;
41 import java.awt.event.ActionListener;
42 import java.awt.event.InputEvent;
43 import java.lang.reflect.Constructor;
44 import java.util.concurrent.CountDownLatch;
45
46 import javax.swing.JFrame;
47 import javax.swing.JButton;
48 import javax.swing.SwingUtilities;
49 import javax.swing.JTextArea;
50
51 public class SequencedEventTest extends JFrame implements ActionListener {
52 private JButton spamMeButton;
53 private static Robot robot;
54 private static SequencedEventTest window;
55 private static AppContext context;
56
57 public static void main(String[] args) throws Exception {
58 SwingUtilities.invokeAndWait(() -> {
59 window = new SequencedEventTest();
60 window.setVisible(true);
61 });
62
63 robot = new Robot();
64 robot.waitForIdle();
65
66 Point pt = window.spamMeButton.getLocationOnScreen();
67 Dimension d = window.spamMeButton.getSize();
68
69 robot.mouseMove(pt.x + d.width / 2, pt.y + d.height / 2);
70 robot.waitForIdle();
71 robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
72 robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
73 /*
74 *Cannot have robot.waitForIdle() here since it will block the test forever,
75 * in the case of failure and the test will timeout.
76 */
77
78 try {
79 /*
80 * Wait for 2 seconds, and then see if all the sequenced events are dispatched.
81 */
82 Thread.sleep(2000);
83 AWTEvent ev = Toolkit.getDefaultToolkit().getSystemEventQueue().
84 peekEvent(java.awt.event.FocusEvent.FOCUS_LAST + 1);
85
86 if (ev != null)
87 throw new RuntimeException("Test case failed!");
88 } catch (InterruptedException e) {
89 throw new RuntimeException("Test case failed." + e.getMessage());
90 }
91
92 /*
93 * In the case of failure, the cleanup job cannot be executed, since it
94 * will block the test.
95 */
96 System.out.println("Test case succeeded.");
97 context.dispose();
98 SwingUtilities.invokeAndWait(() -> window.dispose());
99 }
100
101 public SequencedEventTest() {
102 super("Test Window");
103
104 setLayout(new FlowLayout());
105 JTextArea textBlock = new JTextArea("Lorem ipsum dolor sit amet...");
106 add(textBlock);
107
108 spamMeButton = new JButton("Press me!");
109 spamMeButton.addActionListener(this);
110 add(spamMeButton);
111 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
112 pack();
113 }
114
115 @Override
116 public void actionPerformed(ActionEvent e) {
117 if(e.getSource() == spamMeButton) {
118 AWTEvent eventOne = getSequencedEvent();
119 AWTEvent eventFour = getSequencedEvent();
120 ThreadGroup tg = new ThreadGroup("TestThreadGroup" );
121 CountDownLatch latch = new CountDownLatch(1);
122 Thread t = new Thread(tg, () -> {
123 context = SunToolkit.createNewAppContext();
124 AWTEvent eventTwo = getSequencedEvent();
125 AWTEvent eventThree = getSequencedEvent();
126
127 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventThree);
128 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 0, null));
129 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 1, null));
130 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventTwo);
131
132 latch.countDown();
133 });
134
135 t.start();
136 try {
137 latch.await();
138 }catch (InterruptedException ex) {
139 throw new RuntimeException("Test case failed.");
140 }
141
142 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventFour);
143 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 2, null));
144 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 3, null));
145 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventOne);
146
147 try {
148 t.join();
149 } catch (InterruptedException ex) {
150 throw new RuntimeException("Test case failed.");
151 }
152 }
153 }
154
155 private AWTEvent getSequencedEvent()
156 {
157 AWTEvent wrapMe = new AWTEvent(this, AWTEvent.RESERVED_ID_MAX) {};
158
159 try {
160 /*
161 * SequencedEvent is a package private class, which cannot be instantiated
162 * by importing. So use reflection to create an instance.
163 */
164 Class<? extends AWTEvent> seqClass = (Class<? extends AWTEvent>) Class.forName("java.awt.SequencedEvent");
165 Constructor<? extends AWTEvent> seqConst = seqClass.getConstructor(AWTEvent.class);
166 seqConst.setAccessible(true);;
167 return seqConst.newInstance(wrapMe);
168 } catch (Throwable err) {
169 throw new RuntimeException("Unable to instantiate SequencedEvent",err);
170 }
171 }
172 }