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 * @version $Id: ManagedReloadingDetector.java 1624601 2014-09-12 18:04:36Z oheger $ 029 */ 030public class ManagedReloadingDetector implements ReloadingDetector, 031 ManagedReloadingDetectorMBean 032{ 033 /** The logger. */ 034 private final Log log = LogFactory.getLog(ManagedReloadingDetector.class); 035 036 /** A flag whether a reload is required. */ 037 private volatile boolean reloadingRequired; 038 039 /** 040 * {@inheritDoc} This implementation resets the internal flag indicating 041 * that a reload should be performed. 042 */ 043 @Override 044 public void reloadingPerformed() 045 { 046 reloadingRequired = false; 047 } 048 049 /** 050 * Checks whether reloading is required. This implementation checks whether 051 * the {@code refresh()} method has been invoked. 052 * 053 * @return a flag whether reloading is required 054 */ 055 @Override 056 public boolean isReloadingRequired() 057 { 058 return reloadingRequired; 059 } 060 061 /** 062 * Tells this strategy that the monitored configuration file should be 063 * refreshed. This method will typically be called from outside (through an 064 * exposed MBean) on behalf of an administrator. 065 * 066 * @see org.apache.commons.configuration2.reloading.ManagedReloadingDetectorMBean#refresh() 067 */ 068 @Override 069 public void refresh() 070 { 071 log.info("Reloading configuration."); 072 reloadingRequired = true; 073 } 074}