    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.log4j.jcl;
    018
    019    import java.io.IOException;
    020    import java.util.concurrent.ConcurrentHashMap;
    021    import java.util.concurrent.ConcurrentMap;
    022
    023    import org.apache.commons.logging.Log;
    024    import org.apache.commons.logging.LogConfigurationException;
    025    import org.apache.commons.logging.LogFactory;
    026    import org.apache.logging.log4j.spi.LoggerAdapter;
    027
    028    /**
    029     * Log4j binding for Commons Logging.
    030     * {@inheritDoc}
    031     */
    032    public class LogFactoryImpl extends LogFactory {
    033
    034        private final LoggerAdapter<Log> adapter = new LogAdapter();
    035
    036        private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<String, Object>();
    037
    038        @Override
    039        public Log getInstance(final String name) throws LogConfigurationException {
    040            return adapter.getLogger(name);
    041        }
    042
    043        @Override
    044        public Object getAttribute(final String name) {
    045            return attributes.get(name);
    046        }
    047
    048        @Override
    049        public String[] getAttributeNames() {
    050            return attributes.keySet().toArray(new String[attributes.size()]);
    051        }
    052
    053        @Override
    054        public Log getInstance(@SuppressWarnings("rawtypes") final Class clazz) throws LogConfigurationException {
    055            return getInstance(clazz.getName());
    056        }
    057
    058        /**
    059         * This method is supposed to clear all loggers. In this implementation it will clear all the logger
    060         * wrappers but the loggers managed by the underlying logger context will not be.
    061         */
    062        @Override
    063        public void release() {
    064            try {
    065                adapter.close();
    066            } catch (final IOException ignored) {
    067            }
    068        }
    069
    070        @Override
    071        public void removeAttribute(final String name) {
    072            attributes.remove(name);
    073        }
    074
    075        @Override
    076        public void setAttribute(final String name, final Object value) {
    077            if (value != null) {
    078                attributes.put(name, value);
    079            } else {
    080                removeAttribute(name);
    081            }
    082        }
    083
    084    }