include/SqlLogConnection.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 SQLLOGCONNECTION_H
  21 #define SQLLOGCONNECTION_H
  22 #include<CSql.h>
  23 #include<AbsSqlConnection.h>
  24 #include<SqlFactory.h>
  25 #include<Util.h>
  26 #include<Network.h>
  27
  28 class CachedTable{
  29     public:
  30     char tableName[IDENTIFIER_LENGTH];
  31 };
  32
  33 /**
  34 * @class SqlLogConnection
  35 *
  36 */
  37 class SqlLogConnection : public AbsSqlConnection
  38 {
  39     Connection dummyConn;
  40
  41     //stores all the sql log packets to be shipped to peers
  42     List logStore;
  43
  44     //stores all the prepare log packets to be shipped to peers
  45     //as soon as connection is reestablished to cache server
  46     List prepareStore;
  47
  48     //stores all the prepare log packets to be shipped between two
  49     //consecutive commits. Commit() call sends first all the stmts
  50     //prepared during the course and then sends the exec pkts
  51     List curPrepareStore;
  52
  53     //sync mode of the current transaction
  54     TransSyncMode syncMode;
  55
  56     //stores client objects in it for peer
  57     NetworkTable nwTable;
  58
  59     static UniqueID txnUID;
  60
  61     static List cacheList;
  62     DbRetVal populateCachedTableList();
  63
  64     public:
  65     SqlLogConnection(){innerConn = NULL; syncMode = ASYNC;}
  66
  67     bool isTableCached(char *name);
  68
  69     //Note::forced to implement this as it is pure virtual in base class
  70     Connection& getConnObject(){  return dummyConn; }
  71
  72     DbRetVal connect (char *user, char * pass);
  73
  74     DbRetVal disconnect();
  75
  76     DbRetVal commit();
  77
  78     DbRetVal rollback();
  79
  80     DbRetVal beginTrans (IsolationLevel isoLevel, TransSyncMode mode);
  81
  82     DbRetVal addPacket(BasePacket *pkt);
  83
  84     DbRetVal addPreparePacket(PacketPrepare *pkt);
  85     DbRetVal removePreparePacket(int stmtid);
  86
  87     DbRetVal setSyncMode(TransSyncMode mode);
  88     TransSyncMode getSyncMode() { return syncMode; }
  89     DbRetVal connectIfNotConnected() { return nwTable.connectIfNotConnected(); }
  90     DbRetVal  sendAndReceive(NetworkPacketType type, char *packet, int length);
  91     friend class SqlFactory;
  92 };
  93
  94 #endif