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 */ 017package org.apache.logging.log4j.core.config.properties; 018 019import org.apache.logging.log4j.core.config.Configuration; 020import org.apache.logging.log4j.core.config.ConfigurationSource; 021import org.apache.logging.log4j.core.config.Reconfigurable; 022import org.apache.logging.log4j.core.config.builder.api.Component; 023import org.apache.logging.log4j.core.config.builder.impl.BuiltConfiguration; 024 025import java.io.IOException; 026 027/** 028 * Configuration created from a properties file. 029 * @since 2.4 030 */ 031public class PropertiesConfiguration extends BuiltConfiguration implements Reconfigurable { 032 033 private static final long serialVersionUID = 5198216024278070407L; 034 035 public PropertiesConfiguration(ConfigurationSource source, Component root) { 036 super(source, root); 037 } 038 039 @Override 040 public Configuration reconfigure() { 041 try { 042 final ConfigurationSource source = getConfigurationSource().resetInputStream(); 043 if (source == null) { 044 return null; 045 } 046 final PropertiesConfigurationFactory factory = new PropertiesConfigurationFactory(); 047 final PropertiesConfiguration config = factory.getConfiguration(source); 048 return config.root.getComponents().size() == 0 ? null : config; 049 } catch (final IOException ex) { 050 LOGGER.error("Cannot locate file {}: {}", getConfigurationSource(), ex); 051 } 052 return null; 053 } 054 055 056}