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 * @summary AWT hang occurrs when sequenced events arrive out of sequence
28 * @run main SequencedEventTest
29 */
30 import sun.awt.AppContext;
31 import sun.awt.SunToolkit;
32
33 import java.awt.Robot;
34 import java.awt.Point;
35 import java.awt.Dimension;
36 import java.awt.FlowLayout;
37 import java.awt.AWTEvent;
38 import java.awt.Toolkit;
39 import java.awt.event.ActionEvent;
40 import java.awt.event.ActionListener;
41 import java.awt.event.InputEvent;
42 import java.lang.reflect.Constructor;
43 import java.util.concurrent.CountDownLatch;
44
45 import javax.swing.JFrame;
46 import javax.swing.JButton;
47 import javax.swing.SwingUtilities;
48 import javax.swing.JTextArea;
49
50 public class SequencedEventTest extends JFrame implements ActionListener {
51 private JButton spamMeButton;
52 private static Robot robot;
53 private static SequencedEventTest window;
54 private static AppContext context;
55
56 public static void main(String[] args) throws Exception {
57 SwingUtilities.invokeAndWait(() -> {
58 window = new SequencedEventTest();
59 window.setVisible(true);
60 });
61
62 robot = new Robot();
63 robot.waitForIdle();
64
65 Point pt = window.spamMeButton.getLocationOnScreen();
66 Dimension d = window.spamMeButton.getSize();
67
68 robot.mouseMove(pt.x + d.width / 2, pt.y + d.height / 2);
69 robot.waitForIdle();
70 robot.mousePress(InputEvent.BUTTON1_DOWN_MASK);
71 robot.mouseRelease(InputEvent.BUTTON1_DOWN_MASK);
72 /*
73 *Cannot have robot.waitForIdle() here since it will block the test forever,
74 * in the case of failure and the test will timeout.
75 */
76
77 try {
78 /*
79 * Wait for 2 seconds, and then see if all the sequenced events are dispatched.
80 */
81 Thread.sleep(2000);
82 AWTEvent ev = Toolkit.getDefaultToolkit().getSystemEventQueue().
83 peekEvent(java.awt.event.FocusEvent.FOCUS_LAST + 1);
84
85 if (ev != null)
86 throw new RuntimeException("Test case failed!");
87 } catch (InterruptedException e) {
88 throw new RuntimeException("Test case failed." + e.getMessage());
89 }
90
91 /*
92 * In the case of failure, the cleanup job cannot be executed, since it
93 * will block the test.
94 */
95 System.out.println("Test case succeeded.");
96 context.dispose();
97 SwingUtilities.invokeAndWait(() -> window.dispose());
98 }
99
100 public SequencedEventTest() {
101 super("Test Window");
102
103 setLayout(new FlowLayout());
104 JTextArea textBlock = new JTextArea("Lorem ipsum dolor sit amet...");
105 add(textBlock);
106
107 spamMeButton = new JButton("Press me!");
108 spamMeButton.addActionListener(this);
109 add(spamMeButton);
110 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
111 pack();
112 }
113
114 @Override
115 public void actionPerformed(ActionEvent e) {
116 if(e.getSource() == spamMeButton) {
117 AWTEvent eventOne = getSequencedEvent();
118 AWTEvent eventFour = getSequencedEvent();
119 ThreadGroup tg = new ThreadGroup("TestThreadGroup" );
120 CountDownLatch latch = new CountDownLatch(1);
121 Thread t = new Thread(tg, () -> {
122 context = SunToolkit.createNewAppContext();
123 AWTEvent eventTwo = getSequencedEvent();
124 AWTEvent eventThree = getSequencedEvent();
125
126 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventThree);
127 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 0, null));
128 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 1, null));
129 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventTwo);
130
131 latch.countDown();
132 });
133
134 t.start();
135 try {
136 latch.await();
137 }catch (InterruptedException ex) {
138 throw new RuntimeException("Test case failed.");
139 }
140
141 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventFour);
142 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 2, null));
143 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(new ActionEvent(this, 3, null));
144 Toolkit.getDefaultToolkit().getSystemEventQueue().postEvent(eventOne);
145
146 try {
147 t.join();
148 } catch (InterruptedException ex) {
149 throw new RuntimeException("Test case failed.");
150 }
151 }
152 }
153
154 private AWTEvent getSequencedEvent()
155 {
156 AWTEvent wrapMe = new AWTEvent(this, AWTEvent.RESERVED_ID_MAX) {};
157
158 try {
159 /*
160 * SequencedEvent is a package private class, which cannot be instantiated
161 * by importing. So use reflection to create an instance.
162 */
163 Class<? extends AWTEvent> seqClass = (Class<? extends AWTEvent>) Class.forName("java.awt.SequencedEvent");
164 Constructor<? extends AWTEvent> seqConst = seqClass.getConstructor(AWTEvent.class);
165 seqConst.setAccessible(true);;
166 return seqConst.newInstance(wrapMe);
167 } catch (Throwable err) {
168 throw new RuntimeException("Unable to instantiate SequencedEvent",err);
169 }
170 }
171 }