include/Session.h

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/***************************************************************************
 *   Copyright (C) 2007 by www.databasecache.com                           *
 *   Contact: praba_tuty@databasecache.com                                 *
 *                                                                         *
 *   This program 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.                                   *
 *                                                                         *
 *   This program 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.                          *
 *                                                                         *
  ***************************************************************************/
#ifndef SESSION_H
#define SESSION_H
#include<DatabaseManager.h>
#include<UserManager.h>
#include<ErrorType.h>
class Session;
enum IsolationLevel
{
    READ_UNCOMMITTED = 1,
    READ_COMMITTED = 2,
    READ_REPEATABLE = 3,
    WRITE_OSYNC = 4 //this will work only from sqlapi
                    //for dbapi WRITE_OSYNC = READ_REPEATABLE
};

class Connection
{
    Session *session;
    public:
    Connection() { session = NULL; }
    ~Connection(); 

    DbRetVal open(const char*username, const char*password);


    DbRetVal close();

    DatabaseManager* getDatabaseManager();

    UserManager* getUserManager();

    DbRetVal startTransaction(IsolationLevel level = READ_COMMITTED);

    DbRetVal commit();

    DbRetVal rollback();
};


class Session
{
    public:
    virtual DbRetVal open(const char*username, const char*password)=0;
    virtual DbRetVal close()=0;

    virtual DatabaseManager* getDatabaseManager()=0;
    virtual UserManager* getUserManager()=0;

    virtual DbRetVal startTransaction(IsolationLevel level)=0;
    virtual DbRetVal commit()=0;
    virtual DbRetVal rollback()=0;
    //TODO:: virtual int setAutoCommit(bool flag)=0;
    //TODO::support for save points
    virtual ~Session() { }

};



#endif

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