1 /*
   2  * Copyright (c) 2012, 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  /* @test
  25   * @bug  7160252 7197662
  26   * @summary Checks if events are delivered to a listener
  27   *          when a child node is added or removed
  28   * @run main/othervm -Djava.util.prefs.userRoot=. AddNodeChangeListener
  29   */
  30 
  31 import java.util.prefs.*;
  32 
  33  public class AddNodeChangeListener {
  34 
  35      private static boolean failed = false;
  36      private static Preferences userRoot, N2;
  37      private static NodeChangeListenerAdd ncla;
  38 
  39      public static void main(String[] args)
  40          throws BackingStoreException, InterruptedException
  41      {
  42         userRoot = Preferences.userRoot();
  43         ncla = new NodeChangeListenerAdd();
  44         userRoot.addNodeChangeListener(ncla);
  45         //Should initiate a node added event
  46         addNode();
  47         // Should not initiate a node added event
  48         addNode();
  49         //Should initate a child removed event
  50         removeNode();
  51 
  52         if (failed)
  53             throw new RuntimeException("Failed");
  54     }
  55 
  56     private static void addNode()
  57         throws BackingStoreException, InterruptedException
  58     {
  59         N2 = userRoot.node("N2");
  60         userRoot.flush();
  61         Thread.sleep(3000);
  62         if (ncla.getAddNumber() != 1)
  63             failed = true;
  64     }
  65 
  66     private static void removeNode()
  67         throws BackingStoreException, InterruptedException
  68     {
  69         N2.removeNode();
  70         userRoot.flush();
  71         Thread.sleep(3000);
  72         if (ncla.getAddNumber() != 0)
  73             failed = true;
  74     }
  75 
  76     private static class NodeChangeListenerAdd implements NodeChangeListener {
  77         private int totalNode = 0;
  78 
  79         @Override
  80         public void childAdded(NodeChangeEvent evt) {
  81             totalNode++;
  82         }
  83 
  84         @Override
  85         public void childRemoved(NodeChangeEvent evt) {
  86             totalNode--;
  87         }
  88 
  89         public int getAddNumber(){
  90             return totalNode;
  91         }
  92     }
  93  }