ReloadingStrategy.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.configuration.reloading;

import org.apache.commons.configuration.FileConfiguration;

/**
 * A strategy to decide if a configuration should be reloaded.
 *
 * @author Emmanuel Bourg
 * @author Olivier Heger
 * @version $Revision: 439648 $, $Date: 2006-09-02 22:42:10 +0200 (Sa, 02 Sep 2006) $
 * @since 1.1
 */
public interface ReloadingStrategy
{
    /**
     * Set the configuration managed by this strategy.
     *
     * @param configuration the configuration to monitor
     */
    void setConfiguration(FileConfiguration configuration);

    /**
     * Initialize the strategy.
     */
    void init();

    /**
     * Tell if the evaluation of the strategy requires to reload the configuration.
     *
     * @return a flag whether a reload should be performed
     */
    boolean reloadingRequired();

    /**
     * Notify the strategy that the file has been reloaded.
     */
    void reloadingPerformed();

}