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.jcl;
018
019import java.io.IOException;
020import java.util.concurrent.ConcurrentHashMap;
021import java.util.concurrent.ConcurrentMap;
022
023import org.apache.commons.logging.Log;
024import org.apache.commons.logging.LogConfigurationException;
025import org.apache.commons.logging.LogFactory;
026import org.apache.logging.log4j.spi.LoggerAdapter;
027
028/**
029 * Log4j binding for Commons Logging.
030 * {@inheritDoc}
031 */
032public class LogFactoryImpl extends LogFactory {
033
034    private final LoggerAdapter<Log> adapter = new LogAdapter();
035
036    private final ConcurrentMap<String, Object> attributes = new ConcurrentHashMap<>();
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}