119 lines
3.7 KiB
Java
119 lines
3.7 KiB
Java
/*
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* Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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@test
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@bug 4848555
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@summary Popping an event queue could cause its thread to restart inadvertently
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@run main StoppingEdtOnPushPopTest
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*/
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import java.awt.AWTEvent;
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import java.awt.ActiveEvent;
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import java.awt.EventQueue;
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import java.awt.Toolkit;
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public class StoppingEdtOnPushPopTest implements Runnable {
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public void start() {
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int before = countEventQueues();
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try {
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for (int i = 0; i < 10; i++) {
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EventQueue.invokeAndWait(this);
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}
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} catch (InterruptedException e) {
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e.printStackTrace();
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throw new RuntimeException("Test was interrupted");
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} catch (java.lang.reflect.InvocationTargetException e) {
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e.printStackTrace();
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throw new RuntimeException("InvocationTargetException occurred");
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}
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pause(1000);
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int after = countEventQueues();
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if (before < after && after > 1) {
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throw new RuntimeException("Test failed (before=" + before
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+ "; after=" + after + ")");
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}
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System.out.println("Test passed");
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}
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public void run() {
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System.out.println("push/pop");
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MyEventQueue queue = new MyEventQueue();
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Toolkit.getDefaultToolkit().getSystemEventQueue().push(queue);
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Toolkit.getDefaultToolkit().getSystemEventQueue()
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.postEvent(new EmptyEvent());
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queue.pop();
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}
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public int countEventQueues() {
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int count = 0;
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System.out.println("All threads currently running in the system");
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Thread threads[] = new Thread[Thread.activeCount()];
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Thread.enumerate(threads);
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for (int i = 0; i < threads.length; ++i) {
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Thread thread = threads[i];
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if (thread != null) {
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System.out.println(thread.getName());
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if (thread.getName().startsWith("AWT-EventQueue")) {
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count++;
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}
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}
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}
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return count;
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}
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public void pause(long aMillis) {
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try {
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Thread.sleep(aMillis);
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} catch (InterruptedException e) {
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e.printStackTrace();
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throw new RuntimeException("Test was interrupted");
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}
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}
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public static void main(String[] args) {
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StoppingEdtOnPushPopTest test = new StoppingEdtOnPushPopTest();
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test.start();
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}
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}
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class MyEventQueue extends EventQueue {
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public MyEventQueue() {
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super();
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}
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public void pop() {
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super.pop();
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}
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}
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class EmptyEvent extends AWTEvent implements ActiveEvent {
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public EmptyEvent() {
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super(new Object(), 0);
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}
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public void dispatch() {
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System.out.println("one more EmptyEvent");
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}
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}
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