include/SessionImpl.h

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.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_IMPL_H
  17 #define SESSION_IMPL_H
  18 #include<DatabaseManager.h>
  19 #include<UserManager.h>
  20 #include<Session.h>
  21
  22 class DatabaseManagerImpl;
  23 class Database;
  24
  25 class SessionImpl : public Session
  26 {
  27     DatabaseManagerImpl *dbMgr;
  28     UserManager *uMgr;
  29
  30     char userName[IDENTIFIER_LENGTH];
  31     bool isAuthenticated;
  32     bool isDba;
  33     bool isXTaken;
  34
  35     public:
  36     SessionImpl()
  37     {
  38         dbMgr = NULL; uMgr = NULL; isXTaken = false;
  39     }
  40     ~SessionImpl()
  41     {
  42         close();
  43     }
  44     //This is used by the server process to initialize and create
  45     //system and user database->create shared memory segment
  46     DbRetVal initSystemDatabase();
  47     //Removes the shared memory segment->deletes both the databases
  48     DbRetVal destroySystemDatabase();
  49
  50     DbRetVal open(const char*username, const char*password);
  51     DbRetVal close();
  52
  53     DatabaseManager* getDatabaseManager();
  54     UserManager* getUserManager();
  55
  56     DbRetVal startTransaction(IsolationLevel level);
  57     DbRetVal commit();
  58     DbRetVal rollback();
  59
  60     DbRetVal readConfigFile();
  61     Database* getSystemDatabase();
  62     DbRetVal getExclusiveLock();
  63     private:
  64     DbRetVal authenticate(const char *username, const char *password);
  65 };
  66
  67 #endif