/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
 *            session.h
 *
 *  Tue Dec 15 13:36:49 CET 2009
 *  Copyright 2009 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of Pracro.
 *
 *  Pracro is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Pracro is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with Pracro; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#ifndef __PRACRO_SESSION_H__
#define __PRACRO_SESSION_H__

#include <string>
#include <map>

#include "mutex.h"

class JournalWriter;

class Session {
public:
  Session(std::string sessionid);

  std::string id();
  
  void lock();
  void unlock();

  void commit();

  JournalWriter *journal();

private:
  JournalWriter *_journal;
  std::string _id;
  Mutex mutex;
};

class Sessions {
public:
  Sessions();

  /**
   * Create a new session, with a unique id. Insert it into the session list,
   * and return its pointer.
   */
  Session *newSession();

  /**
   * Lookup session in session list. Returns the session or NULL if no session
   * exists with that sessionid.
   */
  Session *session(std::string sessionid);

  /**
   * Remove session from the session list and return its pointer. It is up to
   * the caller to delete it.
   */
  Session *takeSession(std::string sessionid);

  /**
   * Remove session from the session list and delete it.
   */
  void deleteSession(std::string sessionid);

  /**
   * Return number of active sessions.
   */
  size_t size();

private:
  std::map<std::string, Session *> sessions;
};


#endif/*__PRACRO_SESSION_H__*/