contractadmin-server.h

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// OSB library ********************************************* -*- C++ -*-
/*
  AUTHOR(S): Darryl Kang (dk)

  RCS information
   $Name: OSB_060808 $
   $Revision: 1.18 $

  License
   OSB rating and billing library for communication networks
   Copyright (C) 2004, 2005, 2006  OSB systems

   This file may be distributed and/or modify under the terms of the
   GNU General Public License (GPL) as published by the Free Software
   Foundation which is provided in the file LICENSE.GPL included in the
   packaging of this file.

   The file 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.

   Holders of a OSB Commercial License may use this file under the terms
   and conditions of this commercial license.
 */

#ifndef _CONTRACTADMIN_SERVER_H_
#define _CONTRACTADMIN_SERVER_H_

// *********************************************************************
// included header files
// + standard includes
// + libraries and external header files
// + local headers

namespace OSB_DB {
    class Session;
}

namespace OSB_LIB {
    class Mutex;
}

// *****************************************************************
// Database session guards.
class SessionGuardBase {
    static OSB_LIB::Mutex mutex_;
public:
    SessionGuardBase(bool noWait);
    virtual ~SessionGuardBase() = 0;

protected:
    OSB_DB::Session& get();

private:
    // copy and assignment not implemented
    SessionGuardBase(const SessionGuardBase&);
    SessionGuardBase& operator=(const SessionGuardBase&);

    OSB_DB::Session* pSession_;
};

struct ReadSession : private SessionGuardBase {
    ReadSession(bool noWait)
      : SessionGuardBase(noWait)
    {
    }
    const OSB_DB::Session& get()
    {
        return SessionGuardBase::get();
    }
};

struct WriteSession : private SessionGuardBase {
    WriteSession(bool noWait)
      : SessionGuardBase(noWait),
        dirty_(false)
    {
    }
    ~WriteSession();
    const OSB_DB::Session& getConst()
    {
        return SessionGuardBase::get();
    }
    OSB_DB::Session& get()
    {
        dirty_ = true;
        return SessionGuardBase::get();
    }
    void commit();
    void rollback();
private:
    bool dirty_;
};
#endif // #ifndef _CONTRACTADMIN_SERVER_H_

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