SubstituteLoggerFactory xref

View Javadoc

    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.helpers;
    26
    27  import java.util.ArrayList;
    28  import java.util.List;
    29
    30  import org.slf4j.ILoggerFactory;
    31  import org.slf4j.Logger;
    32
    33  /**
    34   * SubstituteLoggerFactory is an trivial implementation of
    35   * {@link ILoggerFactory} which always returns the unique instance of NOPLogger.
    36   *
    37   * <p>
    38   * It used as a temporary substitute for the real ILoggerFactory during its
    39   * auto-configuration which may re-enter LoggerFactory to obtain logger
    40   * instances. See also http://bugzilla.slf4j.org/show_bug.cgi?id=106
    41   *
    42   * @author Ceki G&uuml;lc&uuml;
    43   */
    44  public class SubstituteLoggerFactory implements ILoggerFactory {
    45
    46    // keep a record of requested logger names
    47    final List loggerNameList = new ArrayList();
    48
    49    public Logger getLogger(String name) {
    50      synchronized (loggerNameList) {
    51        loggerNameList.add(name);
    52      }
    53      return NOPLogger.NOP_LOGGER;
    54    }
    55
    56    public List getLoggerNameList() {
    57      List copy = new ArrayList();
    58      synchronized (loggerNameList) {
    59        copy.addAll(loggerNameList);
    60      }
    61      return copy;
    62    }
    63
    64  }