    001/**
    002 * Copyright (c) 2004-2011 QOS.ch
    003 * All rights reserved.
    004 *
    005 * Permission is hereby granted, free  of charge, to any person obtaining
    006 * a  copy  of this  software  and  associated  documentation files  (the
    007 * "Software"), to  deal in  the Software without  restriction, including
    008 * without limitation  the rights to  use, copy, modify,  merge, publish,
    009 * distribute,  sublicense, and/or sell  copies of  the Software,  and to
    010 * permit persons to whom the Software  is furnished to do so, subject to
    011 * the following conditions:
    012 *
    013 * The  above  copyright  notice  and  this permission  notice  shall  be
    014 * included in all copies or substantial portions of the Software.
    015 *
    016 * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
    017 * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
    018 * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
    019 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    020 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    021 * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
    022 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    023 *
    024 */
    025package org.slf4j.impl;
    026
    027import org.slf4j.Logger;
    028import org.slf4j.ILoggerFactory;
    029
    030import java.util.concurrent.ConcurrentHashMap;
    031import java.util.concurrent.ConcurrentMap;
    032
    033/**
    034 * JDK14LoggerFactory is an implementation of {@link ILoggerFactory} returning
    035 * the appropriately named {@link JDK14LoggerAdapter} instance.
    036 *
    037 * @author Ceki G&uuml;lc&uuml;
    038 */
    039public class JDK14LoggerFactory implements ILoggerFactory {
    040
    041    // key: name (String), value: a JDK14LoggerAdapter;
    042    ConcurrentMap<String, Logger> loggerMap;
    043
    044    public JDK14LoggerFactory() {
    045        loggerMap = new ConcurrentHashMap<String, Logger>();
    046        // ensure jul initialization. see SLF4J-359
    047        // note that call to java.util.logging.LogManager.getLogManager() fails on the Google App Engine platform. See SLF4J-363
    048        java.util.logging.Logger.getLogger("");
    049    }
    050
    051    /*
    052     * (non-Javadoc)
    053     *
    054     * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
    055     */
    056    public Logger getLogger(String name) {
    057        // the root logger is called "" in JUL
    058        if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) {
    059            name = "";
    060        }
    061
    062        Logger slf4jLogger = loggerMap.get(name);
    063        if (slf4jLogger != null)
    064            return slf4jLogger;
    065        else {
    066            java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(name);
    067            Logger newInstance = new JDK14LoggerAdapter(julLogger);
    068            Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
    069            return oldInstance == null ? newInstance : oldInstance;
    070        }
    071    }
    072}