1/* 2 * Copyright (c) 2004, 2015, 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 4757273 27 * @summary Test that registered notification is sent early enough 28 * @author Eamonn McManus 29 * 30 * @run clean NewMBeanListenerTest 31 * @run build NewMBeanListenerTest 32 * @run main NewMBeanListenerTest 33 */ 34 35import javax.management.*; 36 37/* Tests that you can write a listener for MBean registrations, that 38 * registers another listener on every newly-registered MBean (that is 39 * a NotificationBroadcaster). Provided the newly-registered MBean 40 * waits until its postRegister is called, no notifications will be lost. 41 */ 42public class NewMBeanListenerTest { 43 public static void main(String[] args) throws Exception { 44 final MBeanServer mbs = MBeanServerFactory.createMBeanServer(); 45 final ObjectName delegateName = 46 new ObjectName("JMImplementation:type=MBeanServerDelegate"); 47 final CountListener countListener = new CountListener(); 48 final NotificationListener addListener = new NotificationListener() { 49 public void handleNotification(Notification n, Object h) { 50 if (!(n instanceof MBeanServerNotification)) { 51 System.out.println("Ignoring delegate notif: " + 52 n.getClass().getName()); 53 return; 54 } 55 MBeanServerNotification mbsn = (MBeanServerNotification) n; 56 if (!(mbsn.getType() 57 .equals(MBeanServerNotification 58 .REGISTRATION_NOTIFICATION))) { 59 System.out.println("Ignoring MBeanServer notif: " + 60 mbsn.getType()); 61 return; 62 } 63 System.out.println("Got registration notif for " + 64 mbsn.getMBeanName()); 65 try { 66 mbs.addNotificationListener(mbsn.getMBeanName(), 67 countListener, null, null); 68 } catch (Exception e) { 69 System.out.println("TEST INCORRECT: addNL failed:"); 70 e.printStackTrace(System.out); 71 System.exit(1); 72 } 73 System.out.println("Added notif listener for " + 74 mbsn.getMBeanName()); 75 } 76 }; 77 System.out.println("Adding registration listener"); 78 mbs.addNotificationListener(delegateName, addListener, null, null); 79 final ObjectName broadcasterName = new ObjectName(":type=Broadcaster"); 80 System.out.println("Creating Broadcaster MBean"); 81 mbs.createMBean(Broadcaster.class.getName(), broadcasterName); 82 if (countListener.getCount() == 1) 83 System.out.println("Got notif as expected"); 84 else { 85 System.out.println("TEST FAILED: added listener not called"); 86 System.exit(1); 87 } 88 mbs.unregisterMBean(broadcasterName); 89 Broadcaster b = new Broadcaster(); 90 System.out.println("Registering Broadcaster MBean"); 91 mbs.registerMBean(b, broadcasterName); 92 if (countListener.getCount() == 2) 93 System.out.println("Got notif as expected"); 94 else { 95 System.out.println("TEST FAILED: added listener not called"); 96 System.exit(1); 97 } 98 System.out.println("Test passed"); 99 } 100 101 public static interface BroadcasterMBean {} 102 103 public static class Broadcaster 104 extends NotificationBroadcasterSupport 105 implements BroadcasterMBean, MBeanRegistration { 106 107 public ObjectName preRegister(MBeanServer mbs, ObjectName name) { 108 return name; 109 } 110 111 public void postRegister(Boolean registrationDone) { 112 System.out.println("Broadcaster.postRegister: sending notif"); 113 sendNotification(new Notification("x", this, 0L)); 114 } 115 116 public void preDeregister() { 117 } 118 119 public void postDeregister() { 120 } 121 } 122 123 private static class CountListener implements NotificationListener { 124 private int count; 125 126 public synchronized void handleNotification(Notification n, Object h) { 127 if (!n.getType().equals("x")) { 128 System.out.println("TEST FAILED: received bogus notif: " + n + 129 " (type=" + n.getType() + ")"); 130 System.exit(1); 131 } 132 count++; 133 } 134 135 public synchronized int getCount() { 136 return count; 137 } 138 } 139} 140