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