transaction.h

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/***********************************************************************
 Copyright (c) 2006-2009 by Educational Technology Resources, Inc. and
 (c) 2008 by AboveNet, Inc.  Others may also hold copyrights on code
 in this file.  See the CREDITS.txt file in the top directory of the
 distribution for details.

 This file is part of MySQL++.

 MySQL++ is free software; you can redistribute it and/or modify it
 under the terms of the GNU Lesser General Public License as published
 by the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 MySQL++ 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 Lesser General Public
 License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#if !defined(MYSQLPP_TRANSACTION_H)
#define MYSQLPP_TRANSACTION_H

#include "common.h"

namespace mysqlpp {

#if !defined(DOXYGEN_IGNORE)
// Make Doxygen ignore this
class MYSQLPP_EXPORT Connection;
#endif


class MYSQLPP_EXPORT Transaction
{
public:
        enum IsolationLevel {
                read_uncommitted,       
                read_committed,         
                repeatable_read,        
                serializable            
        };

        // the isolation scope will affect.
        enum IsolationScope {
                this_transaction,       
                session,                        
                global                          
        };

        Transaction(Connection& conn, bool consistent = false);

        Transaction(Connection& conn, IsolationLevel level,
                        IsolationScope scope = this_transaction,
                        bool consistent = false);

        ~Transaction();

        void commit();

        void rollback();

private:
        Connection& conn_;      
        bool finished_;         
};


class MYSQLPP_EXPORT NoTransaction
{
public:
        NoTransaction(Connection&, bool = false)
        {
        }

        ~NoTransaction() { }

        void commit() { }

        void rollback() { }
};

} // end namespace mysqlpp

#endif // !defined(MYSQLPP_TRANSACTION_H)

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