1 /*
   2  * Copyright (c) 2005, 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 6701459
  27  * @summary Test sequence numbers in RelationService notifications.
  28  * @author Eamonn McManus
  29  */
  30 
  31 /*
  32  * Bug 6701459 is for a synchronization problem that is very unlikely to occur
  33  * in practice and it would be very hard to test it.  Instead we just check that
  34  * the fix has not introduced any obviously-wrong behavior in the sequence
  35  * numbers.
  36  */
  37 
  38 import java.util.Arrays;
  39 import java.util.concurrent.ArrayBlockingQueue;
  40 import java.util.concurrent.BlockingQueue;
  41 import javax.management.JMX;
  42 import javax.management.MBeanServer;
  43 import javax.management.MBeanServerFactory;
  44 import javax.management.Notification;
  45 import javax.management.NotificationListener;
  46 import javax.management.ObjectName;
  47 import javax.management.relation.RelationServiceMBean;
  48 import javax.management.relation.Role;
  49 import javax.management.relation.RoleInfo;
  50 import javax.management.relation.RoleList;
  51 
  52 public class RelationNotificationSeqNoTest {
  53     public static void main(String[] args) throws Exception {
  54         MBeanServer mbs = MBeanServerFactory.newMBeanServer();
  55         ObjectName relSvcName = new ObjectName("a:type=relationService");
  56         RelationServiceMBean relSvc =
  57                 JMX.newMBeanProxy(mbs, relSvcName, RelationServiceMBean.class);
  58         mbs.createMBean("javax.management.relation.RelationService",
  59                         relSvcName,
  60                         new Object[] {Boolean.TRUE},
  61                         new String[] {"boolean"});
  62 
  63         final BlockingQueue<Notification> q =
  64                 new ArrayBlockingQueue<Notification>(100);
  65         NotificationListener qListener = new NotificationListener() {
  66             public void handleNotification(Notification notification,
  67                                            Object handback) {
  68                 q.add(notification);
  69             }
  70         };
  71         mbs.addNotificationListener(relSvcName, qListener, null, null);
  72 
  73         RoleInfo leftInfo =
  74             new RoleInfo("left", "javax.management.timer.TimerMBean");
  75         RoleInfo rightInfo =
  76             new RoleInfo("right", "javax.management.timer.Timer");
  77         relSvc.createRelationType("typeName", new RoleInfo[] {leftInfo, rightInfo});
  78         ObjectName timer1 = new ObjectName("a:type=timer,number=1");
  79         ObjectName timer2 = new ObjectName("a:type=timer,number=2");
  80         mbs.createMBean("javax.management.timer.Timer", timer1);
  81         mbs.createMBean("javax.management.timer.Timer", timer2);
  82 
  83         Role leftRole =
  84             new Role("left", Arrays.asList(new ObjectName[] {timer1}));
  85         Role rightRole =
  86             new Role("right", Arrays.asList(new ObjectName[] {timer2}));
  87         RoleList roles =
  88             new RoleList(Arrays.asList(new Role[] {leftRole, rightRole}));
  89 
  90         final int NREPEAT = 10;
  91 
  92         for (int i = 0; i < NREPEAT; i++) {
  93             relSvc.createRelation("relationName", "typeName", roles);
  94             relSvc.removeRelation("relationName");
  95         }
  96 
  97         Notification firstNotif = q.remove();
  98         long seqNo = firstNotif.getSequenceNumber();
  99         for (int i = 0; i < NREPEAT * 2 - 1; i++) {
 100             Notification n = q.remove();
 101             long nSeqNo = n.getSequenceNumber();
 102             if (nSeqNo != seqNo + 1) {
 103                 throw new Exception(
 104                         "TEST FAILED: expected seqNo " + (seqNo + 1) + "; got " +
 105                         nSeqNo);
 106             }
 107             seqNo++;
 108         }
 109         System.out.println("TEST PASSED: got " + (NREPEAT * 2) + " notifications " +
 110                 "with contiguous sequence numbers");
 111     }
 112 }