include/Session.h

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Prabakaran Thirumalai   *
   3  *   praba_tuty@yahoo.com   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15   ***************************************************************************/
  16 #ifndef SESSION_H
  17 #define SESSION_H
  18 #include<DatabaseManager.h>
  19 #include<UserManager.h>
  20 #include<ErrorType.h>
  21 class Session;
  22
  23 //Currently it suppors only READ REPEATABLE transaction isolation level.
  24 //TODO::to implement READ COMMITTED and DIRTY READ isolation level
  25 //NOT to DO: SERIALIZABLE isolation level
  26 class Connection
  27 {
  28     Session *session;
  29     public:
  30     Connection() { session = NULL; }
  31     ~Connection() { delete session; }
  32     DbRetVal open(const char*username, const char*password);
  33     DbRetVal close();
  34     DatabaseManager* getDatabaseManager();
  35     UserManager* getUserManager();
  36     DbRetVal startTransaction();
  37     DbRetVal commit();
  38     DbRetVal rollback();
  39 };
  40 class Session
  41 {
  42     public:
  43     virtual DbRetVal open(const char*username, const char*password)=0;
  44     virtual DbRetVal close()=0;
  45
  46     virtual DatabaseManager* getDatabaseManager()=0;
  47     virtual UserManager* getUserManager()=0;
  48
  49     virtual DbRetVal startTransaction()=0;
  50     virtual DbRetVal commit()=0;
  51     virtual DbRetVal rollback()=0;
  52     //TODO:: virtual int setAutoCommit(bool flag)=0;
  53     //TODO::support for save points
  54     virtual ~Session() { }
  55
  56 };
  57
  58 #endif