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 DllExport 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 #if (defined MMDB && defined EMBED)
  35     static int noOfThreads;
  36 #endif
  37     public:
  38     SessionImpl()
  39     {
  40         dbMgr = NULL; uMgr = NULL;
  41         isXTaken = false;
  42     }
  43     ~SessionImpl()
  44     {
  45         close();
  46     }
  47     //This is used by the server process to initialize and create
  48     //system and user database->create shared memory segment
  49     DbRetVal initSystemDatabase();
  50     //Removes the shared memory segment->deletes both the databases
  51     DbRetVal destroySystemDatabase();
  52
  53     DbRetVal open(const char*username, const char*password);
  54     DbRetVal close();
  55
  56     DatabaseManager* getDatabaseManager();
  57     UserManager* getUserManager();
  58
  59     DbRetVal startTransaction(IsolationLevel level);
  60     DbRetVal commit();
  61     DbRetVal rollback();
  62     char * getUserName() { return userName;}
  63     DbRetVal readConfigFile();
  64     Database* getSystemDatabase();
  65     DbRetVal getExclusiveLock();
  66     private:
  67 #if (defined MMDB && defined EMBED)
  68     DbRetVal openEmbeddedConnection(const char *uname, const char *password);
  69     DbRetVal closeEmbeddedConnection();
  70 #endif
  71     DbRetVal authenticate(const char *username, const char *password);
  72 };
  73
  74 #endif