    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     */
    017    package org.apache.logging.slf4j;
    018
    019    import org.apache.logging.log4j.LogManager;
    020    import org.apache.logging.log4j.spi.AbstractLoggerAdapter;
    021    import org.apache.logging.log4j.spi.LoggerContext;
    022    import org.apache.logging.log4j.util.ReflectionUtil;
    023    import org.slf4j.ILoggerFactory;
    024    import org.slf4j.Logger;
    025
    026    /**
    027     * Log4j implementation of SLF4J ILoggerFactory interface.
    028     */
    029    public 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    }