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.yaml;
018
019import java.io.IOException;
020
021import org.apache.logging.log4j.core.config.Configuration;
022import org.apache.logging.log4j.core.config.ConfigurationSource;
023import org.apache.logging.log4j.core.config.json.JsonConfiguration;
024
025import com.fasterxml.jackson.core.JsonParser;
026import com.fasterxml.jackson.databind.ObjectMapper;
027import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
028
029public class YamlConfiguration extends JsonConfiguration {
030
031    private static final long serialVersionUID = 1L;
032
033    public YamlConfiguration(final ConfigurationSource configSource) {
034        super(configSource);
035    }
036
037    @Override
038    protected ObjectMapper getObjectMapper() {
039        return new ObjectMapper(new YAMLFactory()).configure(JsonParser.Feature.ALLOW_COMMENTS, true);
040    }
041
042    @Override
043    public Configuration reconfigure() {
044        try {
045            final ConfigurationSource source = getConfigurationSource().resetInputStream();
046            if (source == null) {
047                return null;
048            }
049            return new YamlConfiguration(source);
050        } catch (final IOException ex) {
051            LOGGER.error("Cannot locate file {}", getConfigurationSource(), ex);
052        }
053        return null;
054    }
055}