include/SqlConnection.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  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifndef SQLCONNECTION_H
  21 #define SQLCONNECTION_H
  22 #include<CSql.h>
  23 #include<AbsSqlConnection.h>
  24 #include<SqlFactory.h>
  25
  26 class SqlConnection : public AbsSqlConnection
  27 {
  28     Connection conn;
  29     bool isConnOpen;
  30     public:
  31     SqlConnection(){innerConn = NULL; isConnOpen = false; }
  32
  33     /** opens connection to the sql engine
  34     *   @param user username for authentication
  35     *   @param pass password for authentication
  36     *   @return DbRetVal
  37     */
  38     DbRetVal connect (char *user, char * pass) {
  39         DbRetVal ret = conn.open(user, pass);
  40         if (ret == OK) isConnOpen = true;
  41         return ret;
  42     }
  43
  44     /** closes connection to the database and releases all the resources
  45     *   @return DbRetVal
  46     */
  47     DbRetVal disconnect () {
  48         DbRetVal ret = conn.close();
  49         if (ret == OK) isConnOpen = false;
  50         return ret;
  51     }
  52
  53     /** Commits active transaction.
  54     *   It makes all the changes made in the current transaction permanent and <br/>
  55     *   it also releases the locks held by the current transaction.<br/>
  56     *   After a transaction commits, application is required to start another <br/>
  57     *   transaction for further database operations.
  58     *   @return DbRetVal
  59     */
  60     DbRetVal commit() { return conn.commit(); }
  61
  62     /** Aborts the active transaction.
  63     *   undo all the changes made in the current transaction and it also <br/>
  64     *   releases the locks held by the current transaction.<br/>
  65     *   After a transaction rollback, application is required to start another <br/>
  66     *   transaction for further database operations.
  67     *   @return DbRetVal
  68     */
  69     DbRetVal rollback() { return conn.rollback(); }
  70
  71     /** Starts a transaction.
  72     *   The previous transaction should be either committed or rollback <br/>
  73     *   before beginTrans is called. <br/>
  74     *   Applications are required to start transaction before they attempt any <br>
  75     *   database operation.
  76     *   @param isoLevel isolation level. Default is read committed.
  77     *   @return DbRetVal
  78     */
  79     DbRetVal beginTrans (IsolationLevel isoLevel = READ_COMMITTED,
  80                          TransSyncMode mode = OSYNC)
  81         { return conn.startTransaction(isoLevel); }
  82
  83     Connection& getConnObject(){  return conn; }
  84     bool isConnectionOpen() { if (isConnOpen) return true; return false; };
  85
  86     friend class SqlFactory;
  87 };
  88
  89 #endif