133 lines
4.2 KiB
Java
133 lines
4.2 KiB
Java
/*
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* Copyright (c) 2008, 2015, 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 6809322
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* @key randomness
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* @summary Test for missing notifications in a high concurrency environment
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* @author Jaroslav Bachorik
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*
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* @run clean MissingNotificationTest
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* @run build MissingNotificationTest
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* @run main MissingNotificationTest
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*/
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import java.util.Date;
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import java.util.Random;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.TimeUnit;
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import javax.management.timer.Timer;
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import javax.management.Notification;
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import javax.management.NotificationListener;
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public class MissingNotificationTest {
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private static int TASK_COUNT = 10000;
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private static long fixedDelay = 0;// anything bigger than 100 and no alarms remain unfired
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private static class NotifListener implements NotificationListener {
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int count;
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public synchronized void handleNotification(Notification notification, Object handback) {
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count++;
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}
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synchronized int getCount() {
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return count;
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}
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}
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public static void main(String[] args) throws Exception {
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System.out.println(
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">>> Test for missing notifications.");
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System.out.println(">>> Create a Timer object.");
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final Timer timer = new Timer();
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timer.start();
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NotifListener listener = new NotifListener();
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timer.addNotificationListener(listener, null, null);
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ExecutorService executor = Executors.newFixedThreadPool(100);
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final Random rand = new Random();
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for (int i = 0; i < TASK_COUNT; i++) {
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executor.execute(new Runnable() {
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public void run() {
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long dateMillis = System.currentTimeMillis() + fixedDelay + rand.nextInt(2000);
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Date date = new Date(dateMillis);
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timer.addNotification("type", "msg", "userData", date);
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}
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});
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}
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executor.shutdown();
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executor.awaitTermination(20, TimeUnit.SECONDS);
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waitForNotificationsToEnd(listener);
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timer.stop();
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if (listener.count < TASK_COUNT) {
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throw new RuntimeException("Not fired: " + (TASK_COUNT - listener.count));
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} else {
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System.out.println(">>> All notifications handled OK");
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}
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System.out.println(">>> Bye bye!");
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}
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/**
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* Will return when all notifications are handled or after 10sec. of no new
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* notifications
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*
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* @param listener
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* @throws InterruptedException
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*/
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private static void waitForNotificationsToEnd(NotifListener listener)
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throws InterruptedException {
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int oldCout = listener.getCount();
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int noChangeCounter = 1;
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while (listener.getCount() < TASK_COUNT) {
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Thread.sleep(1000);
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System.out.print('.');
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if (oldCout == listener.getCount())//no change
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{
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if (++noChangeCounter > 10) {
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break;
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}
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} else {
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noChangeCounter = 1;
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}
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oldCout = listener.getCount();
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}
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System.out.println();
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}
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}
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