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     char *ptr = (char *) &rpkt->retVal;
  65 /*    if (*ptr != 1) {
  66         printError(ErrPeerResponse, "%s", rpkt->errorString);
  67         delete pkt;
  68         nwClient->disconnect();
  69         delete nwClient;
  70         nwClient = NULL;
  71         return ErrPeerResponse;
  72     }*/
  73     isConnOpen = true;
  74     delete pkt;
  75     return rv;
  76 }
  77 DbRetVal SqlNwConnection::disconnect()
  78 {
  79     DbRetVal rv = OK;
  80     if (! isConnOpen) {
  81         printError(ErrNoConnection, "No connection present");
  82         return ErrNoConnection;
  83     }
  84     rv = nwClient->disconnect();
  85     isConnOpen=false;
  86     delete nwClient;
  87     nwClient = NULL;
  88     return rv;
  89 }
  90
  91 DbRetVal SqlNwConnection::beginTrans(IsolationLevel isoLevel, TransSyncMode mode)
  92 {
  93    if (! isConnOpen) {
  94         printError(ErrNoConnection, "No connection present");
  95         return ErrNoConnection;
  96     }
  97     return OK;
  98 }
  99
 100 DbRetVal SqlNwConnection::commit()
 101 {
 102     if (! isConnOpen) {
 103         printError(ErrNoConnection, "No connection present");
 104         return ErrNoConnection;
 105     }
 106     DbRetVal rv = OK;
 107     rv = nwClient->send(SQL_NW_PKT_COMMIT);
 108     if (rv == ErrNoConnection) {
 109         setConnClosed(false);
 110         return rv;
 111     }
 112     rv = nwClient->receive();
 113     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 114         setConnClosed(false);
 115         return ErrNoConnection;
 116     }
 117     return rv;
 118 }
 119
 120 DbRetVal SqlNwConnection::rollback()
 121 {
 122     if (! isConnOpen) {
 123         printError(ErrNoConnection, "No connection present");
 124         return ErrNoConnection;
 125     }
 126     DbRetVal rv = OK;
 127     rv = nwClient->send(SQL_NW_PKT_ROLLBACK);
 128     if (rv == ErrNoConnection) {
 129         setConnClosed(false);
 130         return rv;
 131     }
 132     rv = nwClient->receive();
 133     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 134         setConnClosed(false);
 135         return ErrNoConnection;
 136     }
 137     return rv;
 138
 139 }