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 025 * JMX management. 026 * 027 * @author Nicolas De loof 028 */ 029public class ManagedReloadingDetector implements ReloadingDetector, 030 ManagedReloadingDetectorMBean 031{ 032 /** The logger. */ 033 private final Log log = LogFactory.getLog(ManagedReloadingDetector.class); 034 035 /** A flag whether a reload is required. */ 036 private volatile boolean reloadingRequired; 037 038 /** 039 * {@inheritDoc} This implementation resets the internal flag indicating 040 * that a reload should be performed. 041 */ 042 @Override 043 public void reloadingPerformed() 044 { 045 reloadingRequired = false; 046 } 047 048 /** 049 * Checks whether reloading is required. This implementation checks whether 050 * the {@code refresh()} method has been invoked. 051 * 052 * @return a flag whether reloading is required 053 */ 054 @Override 055 public boolean isReloadingRequired() 056 { 057 return reloadingRequired; 058 } 059 060 /** 061 * Tells this strategy that the monitored configuration file should be 062 * refreshed. This method will typically be called from outside (through an 063 * exposed MBean) on behalf of an administrator. 064 * 065 * @see org.apache.commons.configuration2.reloading.ManagedReloadingDetectorMBean#refresh() 066 */ 067 @Override 068 public void refresh() 069 { 070 log.info("Reloading configuration."); 071 reloadingRequired = true; 072 } 073}