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 018package org.apache.commons.configuration2.reloading; 019 020import org.apache.commons.logging.Log; 021import org.apache.commons.logging.LogFactory; 022 023/** 024 * A strategy to reload configuration based on management requests. Designed for JMX management. 025 * 026 */ 027public class ManagedReloadingDetector implements ReloadingDetector, ManagedReloadingDetectorMBean { 028 /** The logger. */ 029 private final Log log = LogFactory.getLog(ManagedReloadingDetector.class); 030 031 /** A flag whether a reload is required. */ 032 private volatile boolean reloadingRequired; 033 034 /** 035 * {@inheritDoc} This implementation resets the internal flag indicating that a reload should be performed. 036 */ 037 @Override 038 public void reloadingPerformed() { 039 reloadingRequired = false; 040 } 041 042 /** 043 * Checks whether reloading is required. This implementation checks whether the {@code refresh()} method has been 044 * invoked. 045 * 046 * @return a flag whether reloading is required 047 */ 048 @Override 049 public boolean isReloadingRequired() { 050 return reloadingRequired; 051 } 052 053 /** 054 * Tells this strategy that the monitored configuration file should be refreshed. This method will typically be called 055 * from outside (through an exposed MBean) on behalf of an administrator. 056 * 057 * @see org.apache.commons.configuration2.reloading.ManagedReloadingDetectorMBean#refresh() 058 */ 059 @Override 060 public void refresh() { 061 log.info("Reloading configuration."); 062 reloadingRequired = true; 063 } 064}