    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     */
    017    package 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     */
    036    public 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    }