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     printDebug(DM_Network, "DEBUG:::NWCONNECT send connect pkt %d\n", rv);
  50         if (rv != OK) {
  51         printError(rv, "Data could not be sent");
  52         delete pkt;
  53         delete nwClient;
  54         nwClient = NULL;
  55         return rv;
  56     }
  57     rv = nwClient->receive();
  58     printDebug(DM_Network, "DEBUG:::NWCONNECT receive connect pkt %d \n", rv);
  59         if (rv == ErrPeerTimeOut) {
  60         delete pkt;
  61         delete nwClient;
  62         nwClient = NULL;
  63         return ErrNoConnection;
  64     }
  65     ResponsePacket *rpkt = (ResponsePacket *) ((TCPClient *)nwClient)->respPkt;
  66     if (rpkt->errRetVal != OK) {
  67         delete pkt;
  68         delete nwClient;
  69             nwClient = NULL;
  70         return rpkt->errRetVal;
  71     }
  72         isConnOpen = true;
  73     delete pkt;
  74     return OK;
  75 }
  76 DbRetVal SqlNwConnection::disconnect()
  77 {
  78     DbRetVal rv = OK;
  79     if (! isConnOpen) {
  80         printError(ErrNoConnection, "No connection present");
  81         return ErrNoConnection;
  82     }
  83     rv = nwClient->disconnect();
  84     isConnOpen=false;
  85     delete nwClient;
  86     nwClient = NULL;
  87     return rv;
  88 }
  89
  90 DbRetVal SqlNwConnection::beginTrans(IsolationLevel isoLevel, TransSyncMode mode)
  91 {
  92    if (! isConnOpen) {
  93         printError(ErrNoConnection, "No connection present");
  94         return ErrNoConnection;
  95     }
  96     return OK;
  97 }
  98
  99 DbRetVal SqlNwConnection::commit()
 100 {
 101     if (! isConnOpen) {
 102         printError(ErrNoConnection, "No connection present");
 103         return ErrNoConnection;
 104     }
 105     DbRetVal rv = OK;
 106     rv = nwClient->send(SQL_NW_PKT_COMMIT);
 107     if (rv == ErrNoConnection) {
 108         setConnClosed(false);
 109         return rv;
 110     }
 111     rv = nwClient->receive();
 112     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 113         setConnClosed(false);
 114         return ErrNoConnection;
 115     }
 116     return rv;
 117 }
 118
 119 DbRetVal SqlNwConnection::rollback()
 120 {
 121     if (! isConnOpen) {
 122         printError(ErrNoConnection, "No connection present");
 123         return ErrNoConnection;
 124     }
 125     DbRetVal rv = OK;
 126     rv = nwClient->send(SQL_NW_PKT_ROLLBACK);
 127     if (rv == ErrNoConnection) {
 128         setConnClosed(false);
 129         return rv;
 130     }
 131     rv = nwClient->receive();
 132     if (rv == ErrNoConnection || rv == ErrPeerTimeOut) {
 133         setConnClosed(false);
 134         return ErrNoConnection;
 135     }
 136     return rv;
 137 }