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}