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/*
* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 4661545
* @summary Tests to use an executor to send notifications.
* @author Shanliang JIANG
*
* @run clean NotifExecutorTest
* @run build NotifExecutorTest
* @run main NotifExecutorTest
*/
// java imports
//
import java.io.IOException;
import java.util.concurrent.*;
// JMX imports
//
import javax.management.*;
import javax.management.remote.*;
public class NotifExecutorTest {
public static void main(String[] args) throws Exception {
System.out.println("Tests to use an executor to send notifications.");
final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
final ObjectName mbean = new ObjectName ("Default:name=NotificationEmitter");
final MyListener myLister = new MyListener();
final NotificationListener nullListener = new NotificationListener() {
public void handleNotification(Notification n, Object hb) {
// nothing
}
};
final Object[] params = new Object[] {new Integer(nb)};
final String[] signatures = new String[] {"java.lang.Integer"};
// test with null executor
System.out.println(">>> Test with a null executor.");
mbs.registerMBean(new NotificationEmitter(null), mbean);
mbs.addNotificationListener(mbean, myLister, null, null);
mbs.addNotificationListener(mbean, nullListener, null, null);
mbs.invoke(mbean, "sendNotifications", params, signatures);
check(nb, 0);
mbs.unregisterMBean(mbean);
// test with an executor
System.out.println(">>> Test with a executor.");
mbs.registerMBean(new NotificationEmitter(
new NotifExecutorTest.MyExecutor()), mbean);
mbs.addNotificationListener(mbean, myLister, null, null);
mbs.addNotificationListener(mbean, nullListener, null, null);
mbs.invoke(mbean, "sendNotifications", params, signatures);
check(nb, nb*2);
// test without listener
System.out.println(">>> Test without listener.");
mbs.removeNotificationListener(mbean, myLister);
mbs.removeNotificationListener(mbean, nullListener);
mbs.invoke(mbean, "sendNotifications", params, signatures);
check(0, 0);
}
private static void check(int notifs, int called) throws Exception {
// Waiting...
synchronized (lock) {
for (int i = 0; i < 10; i++) {
if (receivedNotifs < notifs) {
lock.wait(1000);
}
}
}
// Waiting again to ensure no more notifs
//
Thread.sleep(1000);
// checking
synchronized (lock) {
if (receivedNotifs != notifs) {
throw new RuntimeException("The listener expected to receive " +
notifs + " notifs, but got " + receivedNotifs);
} else {
System.out.println(">>> The listener recieved as expected: "+receivedNotifs);
}
if (calledTimes != called) {
throw new RuntimeException("The notif executor should be called " +
called + " times, but got " + calledTimes);
} else {
System.out.println(">>> The executor was called as expected: "+calledTimes);
}
}
// clean
receivedNotifs = 0;
calledTimes = 0;
}
//--------------------------
// private classes
//--------------------------
private static class MyListener implements NotificationListener {
public void handleNotification(Notification notif, Object handback) {
synchronized(lock) {
if(++receivedNotifs >= nb) {
lock.notifyAll();
}
}
}
}
public static class NotificationEmitter
extends NotificationBroadcasterSupport
implements NotificationEmitterMBean {
public NotificationEmitter(Executor executor) {
super(executor);
}
/**
* Send a Notification object with the specified times.
* The sequence number will be from zero to times-1.
*
* @param nb The number of notifications to send
*/
public void sendNotifications(Integer nb) {
System.out.println(">>> NotificationEmitter: asked to send " +
"notifications: " + nb);
Notification notif;
for (int i = 1; i <= nb.intValue(); i++) {
notif = new Notification(null, this, ++seqno);
super.sendNotification(notif);
}
}
}
public interface NotificationEmitterMBean {
public void sendNotifications(Integer nb);
}
public static class MyExecutor extends ThreadPoolExecutor {
public MyExecutor() {
super(1, 1, 1L, TimeUnit.MILLISECONDS,
new ArrayBlockingQueue(nb*5));
}
public synchronized void execute(Runnable job) {
synchronized(lock) {
calledTimes++;
}
super.execute(job);
}
}
private static int nb = 10;
private static int receivedNotifs = 0;
private static int[] lock = new int[0];
private static volatile long seqno;
private static int calledTimes = 0;
}
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