include/Recover.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 RECOVER_H
  21 #define RECOVER_H
  22 #include <AbsSqlStatement.h>
  23 #include <SqlConnection.h>
  24 #include <SqlStatement.h>
  25
  26 class DllExport Recovery
  27 {
  28     void *stmtBuckets;
  29
  30     //contains pointer to start address of the mapped redo log file
  31     //used to traverse till the end of the mapping during redo log processing
  32     public:
  33     char *iter;
  34     Recovery(){
  35         stmtBuckets = NULL;
  36         iter = NULL;
  37     }
  38     void setStmtBucket(void *ptr) { stmtBuckets = ptr; }
  39     ~Recovery() {
  40         //do not free stmtBuckets
  41     }
  42
  43     void addToHashTable(int stmtID, AbsSqlStatement* sHdl, char *stmtstr);
  44     void removeFromHashTable(int stmtID);
  45     AbsSqlStatement *getStmtFromHashTable(int stmtId);
  46     bool isStmtInHashTable(int stmtID);
  47     void freeAllStmtHandles();
  48     DbRetVal filterAndWriteStmtLogs();
  49     DbRetVal readAndPopulateStmts(AbsSqlConnection *conn, bool list = false, bool interactive = false);
  50     DbRetVal iterateStmtLogs(AbsSqlConnection *conn, void *startAddr, int size, bool list=false, bool interactive = false);
  51
  52     int applyRedoLogs(char *redoFile, AbsSqlConnection *conn, bool list = false, bool interactive = false);
  53
  54 #if (defined MMDB && defined EMBED)
  55     DbRetVal recoverCsqlDB(SqlConnection *conn);
  56     DbRetVal recoverSystemAndUserDB(SqlConnection *conn);
  57     DbRetVal applySchemaFile(FILE *fp, SqlConnection *conn);
  58     char getQueryFromSchemaFile(FILE *fp, char *buf);
  59 #endif
  60
  61 private:
  62     //before calling below 4 handleXXX methods, iter should be set
  63     DbRetVal handlePrepare( AbsSqlConnection *conn, bool list=false, bool interactive = false);
  64     DbRetVal handleCommit(AbsSqlConnection *conn, void *startAddr, long size, bool list=false, bool interactive = false);
  65     DbRetVal handleFree(bool list=false, bool interactive = false);
  66     DbRetVal handlePrepareAndExecute(AbsSqlConnection *conn, bool list=false, bool interactive = false);
  67 };
  68
  69 #endif