1 /*
2 * Copyright (c) 2010, 2016, 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 @key headful
27 @bug 6424157
28 @author Artem Ananiev: area=eventqueue
29 @run main PreserveDispatchThread
30 */
31
32 import java.awt.*;
33 import java.awt.event.*;
34
35 public class PreserveDispatchThread {
36
37 private static volatile Frame f;
38 private static volatile Dialog d;
39
40 private static volatile boolean isEDT = true;
41
42 public static void main(String[] args) throws Exception {
43 f = new Frame("F");
44 f.setSize(320, 340);
45 f.setLocationRelativeTo(null);
46 f.setVisible(true);
47
48 try {
49 test1();
50 if (!isEDT) {
51 throw new RuntimeException("Test FAILED (test1): event dispatch thread is changed");
52 }
53
54 test2();
55 if (!isEDT) {
56 throw new RuntimeException("Test FAILED (test2): event dispatch thread is changed");
57 }
58
59 test3();
60 if (!isEDT) {
61 throw new RuntimeException("Test FAILED (test3): event dispatch thread is changed");
62 }
63 } finally {
64 if (d != null) {
65 d.dispose();
66 }
67 f.dispose();
68 }
69 }
70
71 /*
72 * Tests that push/pop doesn't change the dispatch thread if
73 * called on EDT.
74 */
75 private static void test1() throws Exception {
76 EventQueue.invokeAndWait(new Runnable() {
77 @Override
78 public void run() {
79 TestEventQueue teq = new TestEventQueue();
80 EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
81 try {
82 seq.push(teq);
83 d = new TestDialog();
84 d.setVisible(true);
85 checkEDT();
86 } finally {
87 teq.pop();
88 }
89 checkEDT();
90 }
91 });
92 }
93
94 /*
95 * Tests that push/pop doesn't change the dispatch thread if
96 * called on the main thread.
97 */
98 private static void test2() throws Exception {
99 TestEventQueue teq = new TestEventQueue();
100 EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
101 try {
102 seq.push(teq);
103 EventQueue.invokeAndWait(new Runnable() {
104 @Override
105 public void run() {
106 checkEDT();
107 d = new TestDialog();
108 d.setVisible(true);
109 checkEDT();
110 }
111 });
112 } finally {
113 teq.pop();
114 }
115 }
116
117 private static final Object test3Lock = new Object();
118 private static boolean test3Sync = false;
119
120 /*
121 * A complex test: several nested invokeLater() are called and
122 * in every runnable a check for EDT is performed. At the ent
123 * of the test we wait for all the runnables to be processed
124 * and the dialog is disposed; otherwise the last EDT check can
125 * be later than this method returns and the whole test is passed.
126 */
127 private static void test3() throws Exception {
128 EventQueue.invokeLater(new Runnable() {
129 @Override
130 public void run() {
131 d = new Dialog(f, true);
132 d.setSize(240, 180);
133 d.setLocationRelativeTo(f);
134 EventQueue.invokeLater(new Runnable() {
135 @Override
136 public void run() {
137 d.setVisible(true);
138 checkEDT();
139 }
140 });
141 EventQueue.invokeLater(new Runnable() {
142 @Override
143 public void run() {
144 TestEventQueue teq = new TestEventQueue();
145 EventQueue seq = Toolkit.getDefaultToolkit().getSystemEventQueue();
146 try {
147 seq.push(teq);
148 checkEDT();
149 EventQueue.invokeLater(new Runnable() {
150 @Override
151 public void run() {
152 d.dispose();
153 checkEDT();
154 synchronized (test3Lock) {
155 test3Sync = true;
156 test3Lock.notify();
157 }
158 }
159 });
160 } finally {
161 teq.pop();
162 }
163 checkEDT();
164 }
165 });
166 checkEDT();
167 }
168 });
169 synchronized (test3Lock) {
170 while (!test3Sync) {
171 try {
172 test3Lock.wait();
173 } catch (InterruptedException ie) {
174 break;
175 }
176 }
177 }
178 // Make sure all the nested invokeLater/invokeAndWait are processed
179 EventQueue.invokeAndWait(new Runnable() {
180 @Override
181 public void run() {
182 }
183 });
184 }
185
186 private static void checkEDT() {
187 isEDT = isEDT && EventQueue.isDispatchThread();
188 }
189
190 private static class TestEventQueue extends EventQueue {
191 public TestEventQueue() {
192 super();
193 }
194 public void pop() {
195 super.pop();
196 }
197 }
198
199 private static class TestDialog extends Dialog {
200 private volatile boolean dialogShown = false;
201 private volatile boolean paintCalled = false;
202 public TestDialog() {
203 super(f, true);
204 setSize(240, 180);
205 setLocationRelativeTo(f);
206 addComponentListener(new ComponentAdapter() {
207 @Override
208 public void componentShown(ComponentEvent e) {
209 if (paintCalled) {
210 dispose();
211 }
212 dialogShown = true;
213 }
214 });
215 }
216 @Override
217 public void paint(Graphics g) {
218 if (dialogShown) {
219 dispose();
220 }
221 paintCalled = true;
222 }
223 }
224
225 }