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.slf4j;
018
019import org.apache.logging.log4j.LogManager;
020import org.apache.logging.log4j.spi.AbstractLoggerAdapter;
021import org.apache.logging.log4j.spi.LoggerContext;
022import org.apache.logging.log4j.util.ReflectionUtil;
023import org.slf4j.ILoggerFactory;
024import org.slf4j.Logger;
025
026/**
027 * Log4j implementation of SLF4J ILoggerFactory interface.
028 */
029public class Log4jLoggerFactory extends AbstractLoggerAdapter<Logger> implements ILoggerFactory {
030
031    private static final String FQCN = Log4jLoggerFactory.class.getName();
032    private static final String PACKAGE = "org.slf4j";
033
034    @Override
035    protected Logger newLogger(final String name, final LoggerContext context) {
036        final String key = Logger.ROOT_LOGGER_NAME.equals(name) ? LogManager.ROOT_LOGGER_NAME : name;
037        return new Log4jLogger(context.getLogger(key), name);
038    }
039
040    @Override
041    protected LoggerContext getContext() {
042        final Class<?> anchor = ReflectionUtil.getCallerClass(FQCN, PACKAGE);
043        return anchor == null ? LogManager.getContext() : getContext(ReflectionUtil.getCallerClass(anchor));
044    }
045
046}