src/sqlnetwork/SqlNwConnection.cxx

   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 #include<os.h>
  21 #include <SqlNwConnection.h>
  22 #include <Network.h>
  23 #include <CSql.h>
  24
  25 DbRetVal SqlNwConnection::connect (char *user, char * pass)
  26 {
  27     DbRetVal rv = OK;
  28     if (isConnOpen) {
  29         printError(ErrAlready, "Connection is already open");
  30         return ErrAlready;
  31     }
  32     if (nwClient == NULL)  nwClient = new TCPClient();
  33     int bufsize = 2 * IDENTIFIER_LENGTH + sizeof(int);
  34     nwClient->setHost(hostname, port, 123);
  35     rv = nwClient->connect();
  36     if (rv != OK) {
  37         printError(rv, "Connection failed");
  38         delete nwClient;
  39         nwClient = NULL;
  40         return rv;
  41     }
  42     SqlPacketConnect *pkt = new SqlPacketConnect();
  43     pkt->setConnParam(user, pass, sqlApiImplType);
  44     pkt->setBufferSize(bufsize);
  45     char * buffer = (char *) malloc(bufsize);
  46     pkt->setBuffer(buffer);
  47     pkt->marshall();
  48     rv = nwClient->send(SQL_NW_PKT_CONNECT, buffer, bufsize);
  49     if (rv != OK) {
  50         printError(rv, "Data could not be sent");
  51         delete pkt;
  52         delete nwClient;
  53         nwClient = NULL;
  54         return rv;
  55     }
  56     rv = nwClient->receive();
  57     if (rv == ErrPeerTimeOut) {
  58         delete pkt;
  59         delete nwClient;
  60         nwClient = NULL;
  61         return ErrNoConnection;
  62     }
  63     ResponsePacket *rpkt = (ResponsePacket *) ((TCPClient *)nwClient)->respPkt;
  64     if (rpkt->errRetVal != OK) {
  65         delete pkt;
  66         delete nwClient;
  67             nwClient = NULL;
  68         return rpkt->errRetVal;
  69     }
  70     isConnOpen = true;
  71     delete pkt;
  72     return OK;
  73 }
  74 DbRetVal SqlNwConnection::disconnect()
  75 {
  76     DbRetVal rv = OK;
  77     if (! isConnOpen) {
  78         printError(ErrNoConnection, "No connection present");
  79         return ErrNoConnection;
  80     }
  81     rv = nwClient->disconnect();
  82     isConnOpen=false;
  83     delete nwClient;
  84     nwClient = NULL;
  85     return rv;
  86 }
  87
  88 DbRetVal SqlNwConnection::beginTrans(IsolationLevel isoLevel, TransSyncMode mode)
  89 {
  90    if (! isConnOpen) {
  91         printError(ErrNoConnection, "No connection present");
  92         return ErrNoConnection;
  93     }
  94     return OK;
  95 }
  96
  97 DbRetVal SqlNwConnection::commit()
  98 {
  99     if (! isConnOpen) {
 100         printError(ErrNoConnection, "No connection present");
 101         return ErrNoConnection;
 102     }
 103     DbRetVal rv = OK;
 104     rv = nwClient->send(SQL_NW_PKT_COMMIT);
 105     if (rv == ErrNoConnection) {
 106         setConnClosed(false);
 107         return rv;
 108     }
 109     rv = nwClient->receive();
 110     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 111         setConnClosed(false);
 112         return ErrNoConnection;
 113     }
 114     return rv;
 115 }
 116
 117 DbRetVal SqlNwConnection::rollback()
 118 {
 119     if (! isConnOpen) {
 120         printError(ErrNoConnection, "No connection present");
 121         return ErrNoConnection;
 122     }
 123     DbRetVal rv = OK;
 124     rv = nwClient->send(SQL_NW_PKT_ROLLBACK);
 125     if (rv == ErrNoConnection) {
 126         setConnClosed(false);
 127         return rv;
 128     }
 129     rv = nwClient->receive();
 130     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 131         setConnClosed(false);
 132         return ErrNoConnection;
 133     }
 134     return rv;
 135
 136 }