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    1   /**
    2    * Copyright (c) 2004-2011 QOS.ch
    3    * All rights reserved.
    4    *
    5    * Permission is hereby granted, free  of charge, to any person obtaining
    6    * a  copy  of this  software  and  associated  documentation files  (the
    7    * "Software"), to  deal in  the Software without  restriction, including
    8    * without limitation  the rights to  use, copy, modify,  merge, publish,
    9    * distribute,  sublicense, and/or sell  copies of  the Software,  and to
    10   * permit persons to whom the Software  is furnished to do so, subject to
    11   * the following conditions:
    12   *
    13   * The  above  copyright  notice  and  this permission  notice  shall  be
    14   * included in all copies or substantial portions of the Software.
    15   *
    16   * THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,
    17   * EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OF
    18   * MERCHANTABILITY,    FITNESS    FOR    A   PARTICULAR    PURPOSE    AND
    19   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
    20   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
    21   * OF CONTRACT, TORT OR OTHERWISE,  ARISING FROM, OUT OF OR IN CONNECTION
    22   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    23   *
    24   */
    25  package org.slf4j.impl;
    26
    27  import org.slf4j.Logger;
    28  import org.slf4j.ILoggerFactory;
    29
    30  import java.util.concurrent.ConcurrentHashMap;
    31  import java.util.concurrent.ConcurrentMap;
    32
    33  /**
    34   * JDK14LoggerFactory is an implementation of {@link ILoggerFactory} returning
    35   * the appropriately named {@link JDK14LoggerAdapter} instance.
    36   *
    37   * @author Ceki G&uuml;lc&uuml;
    38   */
    39  public class JDK14LoggerFactory implements ILoggerFactory {
    40
    41      // key: name (String), value: a JDK14LoggerAdapter;
    42      ConcurrentMap<String, Logger> loggerMap;
    43
    44      public JDK14LoggerFactory() {
    45          loggerMap = new ConcurrentHashMap<String, Logger>();
    46          // ensure jul initialization. see SLF4J-359
    47          // note that call to java.util.logging.LogManager.getLogManager() fails on the Google App Engine platform. See SLF4J-363
    48          java.util.logging.Logger.getLogger("");
    49      }
    50
    51      /*
    52       * (non-Javadoc)
    53       *
    54       * @see org.slf4j.ILoggerFactory#getLogger(java.lang.String)
    55       */
    56      public Logger getLogger(String name) {
    57          // the root logger is called "" in JUL
    58          if (name.equalsIgnoreCase(Logger.ROOT_LOGGER_NAME)) {
    59              name = "";
    60          }
    61
    62          Logger slf4jLogger = loggerMap.get(name);
    63          if (slf4jLogger != null)
    64              return slf4jLogger;
    65          else {
    66              java.util.logging.Logger julLogger = java.util.logging.Logger.getLogger(name);
    67              Logger newInstance = new JDK14LoggerAdapter(julLogger);
    68              Logger oldInstance = loggerMap.putIfAbsent(name, newInstance);
    69              return oldInstance == null ? newInstance : oldInstance;
    70          }
    71      }
    72  }