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.util;
018
019import java.io.IOException;
020import java.io.InputStream;
021import java.net.URL;
022import java.util.Properties;
023
024/**
025 * PropertySource backed by a properties file. Follows the same conventions as {@link PropertiesPropertySource}.
026 *
027 * @since 2.10.0
028 */
029public class PropertyFilePropertySource extends PropertiesPropertySource {
030
031    public PropertyFilePropertySource(final String fileName) {
032        super(loadPropertiesFile(fileName));
033    }
034
035    private static Properties loadPropertiesFile(final String fileName) {
036        final Properties props = new Properties();
037        for (final URL url : LoaderUtil.findResources(fileName)) {
038            try (final InputStream in = url.openStream()) {
039                props.load(in);
040            } catch (IOException e) {
041                LowLevelLogUtil.logException("Unable to read " + url, e);
042            }
043        }
044        return props;
045    }
046
047    @Override
048    public int getPriority() {
049        return 0;
050    }
051
052}