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 /*

    25  * @test

    26  * @bug 7192275

    27  * @summary Basic test of addPropertyListener/removePropertyListener methods

    28  * @run main/othervm Listeners

    29  */

    30 

    31 import java.util.logging.LogManager;

    32 import java.beans.PropertyChangeListener;

    33 import java.beans.PropertyChangeEvent;

    34 

    35 public class Listeners {

    36 

    37     static void assertTrue(boolean result, String msg) {

    38         if (!result)

    39             throw new RuntimeException(msg);

    40     }

    41 

    42     /**

    43      * A {@code PropertyChangeListener} that counts the number of times that

    44      * the {@code propertyChange} method is fired, and also checks that the

    45      * event source is the expected (fixed) object.

    46      */

    47     static class Listener implements PropertyChangeListener {

    48         private final Object expectedSource;

    49         private int fireCount;

    50 

    51         Listener(Object expectedSource) {

    52             this.expectedSource = expectedSource;

    53         }

    54 

    55         int fireCount() {

    56             return fireCount;

    57         }

    58 

    59         Listener reset() {

    60             fireCount = 0;

    61             return this;

    62         }

    63 

    64         @Override

    65         public void propertyChange(PropertyChangeEvent evt) {

    66             assertTrue(evt.getSource() == expectedSource, "Unexpected source");

    67             fireCount++;

    68         }

    69     }

    70 

    71     /**

    72      * Tests that the given listeners are invoked the expected number of

    73      * times.

    74      */

    75     static void test(Listener[] listeners, int... expected) throws Exception {

    76         // reset counts

    77         for (Listener listener : listeners) {

    78             listener.reset();

    79         }

    80 

    81         // re-reading configuration causes events to be fired

    82         LogManager.getLogManager().readConfiguration();

    83 

    84         // check event listeners invoked as expected

    85         for (int i = 0; i < expected.length; i++) {

    86             assertTrue(listeners[i].fireCount() == expected[i],

    87                 "Unexpected event count");

    88         }

    89     }

    90 

    91     @SuppressWarnings("deprecation")

    92     public static void main(String[] args) throws Exception {

    93         LogManager logman = LogManager.getLogManager();

    94 

    95         Listener[] listeners = new Listener[2];

    96         Listener listener1 = listeners[0] = new Listener(LogManager.class);

    97         Listener listener2 = listeners[1] = new Listener(LogManager.class);

    98 

    99         // add listeners

   100         logman.addPropertyChangeListener(listener1);

   101         test(listeners, 1, 0);

   102 

   103         logman.addPropertyChangeListener(listener1);

   104         test(listeners, 2, 0);

   105 

   106         logman.addPropertyChangeListener(listener2);

   107         test(listeners, 2, 1);

   108 

   109         // null handling to check for impact on the existing registrations

   110         try {

   111             logman.addPropertyChangeListener(null);

   112             assertTrue(false, "NullPointerException expected");

   113         } catch (NullPointerException expected) { }

   114         test(listeners, 2, 1);

   115 

   116         logman.removePropertyChangeListener(null);  // no-op

   117         test(listeners, 2, 1);

   118 

   119         // remove listeners

   120         logman.removePropertyChangeListener(listener1);

   121         test(listeners, 1, 1);

   122 

   123         logman.removePropertyChangeListener(listener1);

   124         test(listeners, 0, 1);

   125 

   126         logman.removePropertyChangeListener(listener1);  // no-op

   127         test(listeners, 0, 1);

   128 

   129         logman.removePropertyChangeListener(listener2);

   130         test(listeners, 0, 0);

   131 

   132         logman.removePropertyChangeListener(listener2);  // no-op

   133         test(listeners, 0, 0);

   134     }

   135 }