1 /*
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   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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
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  24  */
  25 
  26  /* @test
  27   * @bug  7160252
  28   * @summary Checks if events are delivered to a listener
  29   *          when a child node is added or removed
  30   * @run main/othervm -Djava.util.prefs.userRoot=. AddNodeChangeListener
  31   */
  32 
  33 import java.util.prefs.*;
  34 
  35  public class AddNodeChangeListener {
  36 
  37      private static boolean failed = false;
  38      private static Preferences userRoot, N2;
  39      private static NodeChangeListenerAdd ncla;
  40 
  41      public static void main(String[] args)
  42          throws BackingStoreException, InterruptedException
  43      {
  44         userRoot = Preferences.userRoot();
  45         ncla = new NodeChangeListenerAdd();
  46         userRoot.addNodeChangeListener(ncla);
  47         //Should initiate a node added event
  48         addNode();
  49         // Should not initiate a node added event
  50         addNode();
  51         //Should initate a child removed event
  52         removeNode();
  53 
  54         if (failed)
  55             throw new RuntimeException("Failed");
  56     }
  57 
  58     private static void addNode()
  59         throws BackingStoreException, InterruptedException
  60     {
  61         N2 = userRoot.node("N2");
  62         userRoot.flush();
  63         Thread.sleep(3000);
  64         if (ncla.getAddNumber() != 1)
  65             failed = true;
  66     }
  67 
  68     private static void removeNode()
  69         throws BackingStoreException, InterruptedException
  70     {
  71         N2.removeNode();
  72         userRoot.flush();
  73         Thread.sleep(3000);
  74         if (ncla.getAddNumber() != 0)
  75             failed = true;
  76     }
  77 
  78     private static class NodeChangeListenerAdd implements NodeChangeListener {
  79         private int totalNode = 0;
  80 
  81         @Override
  82         public void childAdded(NodeChangeEvent evt) {
  83             totalNode++;
  84         }
  85 
  86         @Override
  87         public void childRemoved(NodeChangeEvent evt) {
  88             totalNode--;
  89         }
  90 
  91         public int getAddNumber(){
  92             return totalNode;
  93         }
  94     }
  95  }