001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.configuration.event;
018
019/**
020 * <p>
021 * A simple event listener interface for configuration observers.
022 * </p>
023 * <p>
024 * This interface can be implemented by classes that are interested in
025 * &quot;raw&quot; events caused by configuration objects. Each manipulation on
026 * a configuration object will generate such an event. There is only a single
027 * method that is invoked when an event occurs.
028 * </p>
029 *
030 * @author <a
031 * href="http://commons.apache.org/configuration/team-list.html">Commons
032 * Configuration team</a>
033 * @version $Id: ConfigurationListener.java 561230 2007-07-31 04:17:09Z rahul $
034 * @since 1.3
035 */
036public interface ConfigurationListener
037{
038    /**
039     * Notifies this listener about a manipulation on a monitored configuration
040     * object.
041     *
042     * @param event the event describing the manipulation
043     */
044    void configurationChanged(ConfigurationEvent event);
045}