/*
 * The Apache Software License, Version 1.1
 *
 *
 * Copyright (c) 2001-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *    Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Axis" and "Apache Software Foundation" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache",
 *    nor may "Apache" appear in their name, without prior written
 *    permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.jboss.axis.session;

import java.util.Enumeration;
import java.util.Hashtable;

/**
 * A trivial session implementation.
 *
 * @author Glen Daniels (gdaniels@macromedia.com)
 */
public class SimpleSession implements Session
{
   private Hashtable rep = null;

   /**
    * Inactivity timeout (in seconds).
    * Not used yet.
    */
   private int timeout = -1;
   private long lastTouched;

   /**
    * Default constructor - set lastTouched to now
    */
   public SimpleSession()
   {
      lastTouched = System.currentTimeMillis();
   }

   /**
    * Get a property from the session
    *
    * @param key the name of the property desired.
    */
   public Object get(String key)
   {
      if (rep == null)
         return null;
      lastTouched = System.currentTimeMillis();
      return rep.get(key);
   }

   /**
    * Set a property in the session
    *
    * @param key   the name of the property to set.
    * @param value the value of the property.
    */
   public void set(String key, Object value)
   {
      synchronized (this)
      {
         if (rep == null)
            rep = new Hashtable();
      }
      lastTouched = System.currentTimeMillis();
      rep.put(key, value);
   }

   /**
    * Remove a property from the session
    *
    * @param key the name of the property desired.
    */
   public void remove(String key)
   {
      if (rep != null)
         rep.remove(key);
      lastTouched = System.currentTimeMillis();
   }

   /**
    * Get an enumeration of the keys in this session
    */
   public Enumeration getKeys()
   {
      if (rep != null)
         return rep.keys();
      return null;
   }

   /**
    * Set the session's time-to-live.
    * <p/>
    * This is implementation-specific, but basically should be the #
    * of seconds of inactivity which will cause the session to time
    * out and invalidate.  "inactivity" is implementation-specific.
    */
   public void setTimeout(int timeout)
   {
      this.timeout = timeout;
   }

   public int getTimeout()
   {
      return timeout;
   }

   /**
    * "Touch" the session (mark it recently used)
    */
   public void touch()
   {
      lastTouched = System.currentTimeMillis();
   }

   public long getLastAccessTime()
   {
      return lastTouched;
   }

   /**
    * Get an Object suitable for synchronizing the session.  This method
    * exists because different session implementations might provide
    * different ways of getting at shared data.  For a simple hashtable-
    * based session, this would just be the hashtable, but for sessions
    * which use database connections, etc. it might be an object wrapping
    * a table ID or somesuch.
    */
   public synchronized Object getLockObject()
   {
      if (rep == null)
      {
         rep = new Hashtable();
      }
      return rep;
   }
}
