/* 
    P/P   *  Method: net.sourceforge.pebble.web.listener.LoggingSessionListener__static_init
          * 
          *  Postconditions:
          *    init'ed(log)
          */
     1  /*
     2   * Copyright (c) 2003-2006, Simon Brown
     3   * All rights reserved.
     4   *
     5   * Redistribution and use in source and binary forms, with or without
     6   * modification, are permitted provided that the following conditions are met:
     7   *
     8   *   - Redistributions of source code must retain the above copyright
     9   *     notice, this list of conditions and the following disclaimer.
    10   *
    11   *   - Redistributions in binary form must reproduce the above copyright
    12   *     notice, this list of conditions and the following disclaimer in
    13   *     the documentation and/or other materials provided with the
    14   *     distribution.
    15   *
    16   *   - Neither the name of Pebble nor the names of its contributors may
    17   *     be used to endorse or promote products derived from this software
    18   *     without specific prior written permission.
    19   *
    20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    30   * POSSIBILITY OF SUCH DAMAGE.
    31   */
    32  package net.sourceforge.pebble.web.listener;
    33  
    34  import org.apache.commons.logging.Log;
    35  import org.apache.commons.logging.LogFactory;
    36  
         /* 
    P/P   *  Method: void net.sourceforge.pebble.web.listener.LoggingSessionListener()
          */
    37  import javax.servlet.http.HttpSessionEvent;
    38  import javax.servlet.http.HttpSessionListener;
    39  
    40  /**
    41   * Logs when a session is created or destroyed.
    42   *
    43   * @author    Simon Brown
    44   */
    45  public class LoggingSessionListener implements HttpSessionListener {
    46  
    47    /** the log used by this class */
    48    private static Log log = LogFactory.getLog(LoggingSessionListener.class);
    49  
    50    /**
    51     * Called when a HTTP session is created.
    52     *
    53     * @param event   a HttpSessionEvent
    54     */
    55    public void sessionCreated(HttpSessionEvent event) {
             /* 
    P/P       *  Method: void sessionCreated(HttpSessionEvent)
              * 
              *  Preconditions:
              *    event != null
              *    log != null
              * 
              *  Presumptions:
              *    javax.servlet.http.HttpSessionEvent:getSession(...)@56 != null
              */
    56      log.info("Session " + event.getSession().getId() + " created");
    57      Exception e = new Exception();
    58      e.printStackTrace();
    59    }
    60  
    61    /**
    62     * Called when a HTTP session is destroyed.
    63     *
    64     * @param event   a HttpSessionEvent
    65     */
    66    public void sessionDestroyed(HttpSessionEvent event) {
             /* 
    P/P       *  Method: void sessionDestroyed(HttpSessionEvent)
              * 
              *  Preconditions:
              *    event != null
              *    log != null
              * 
              *  Presumptions:
              *    javax.servlet.http.HttpSessionEvent:getSession(...)@67 != null
              */
    67      log.info("Session " + event.getSession().getId() + " destroyed");
    68    }
    69  
    70  }