include/DatabaseManagerImpl.h

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by www.databasecache.com                           *
   3  *   Contact: praba_tuty@databasecache.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   ***************************************************************************/
  16 #ifndef DATABASE_MANAGER_IMPL_H
  17 #define DATABASE_MANAGER_IMPL_H
  18 #include<os.h>
  19 #include<CatalogTables.h>
  20 #include<Lock.h>
  21 #include<DatabaseManager.h>
  22
  23 class Database;
  24 class SessionImpl;
  25 class TableDef;
  26 class Table;
  27 class FieldNameList;
  28 class ChunkIterator;
  29 class Chunk;
  30 class TransactionManager;
  31
  32
  33 class DatabaseManagerImpl : public DatabaseManager
  34 {
  35     private:
  36     Database* systemDatabase_;
  37     //pointer to system Database
  38
  39     Database* db_;
  40     //pointer to database
  41
  42     LockManager *lMgr_;
  43
  44     TransactionManager *tMgr_;
  45
  46     //only SessionImpl creates object of this class
  47     DatabaseManagerImpl() { systemDatabase_ = NULL; tMgr_ = NULL; lMgr_ =  NULL; db_ = NULL; }
  48     ~DatabaseManagerImpl();
  49
  50     DbRetVal openSystemDatabase();
  51     DbRetVal closeSystemDatabase();
  52     ChunkIterator getSystemTableIterator(CatalogTableID id);
  53     Chunk* getSystemTableChunk(CatalogTableID id);
  54
  55     void createLockManager();
  56     void createTransactionManager();
  57
  58     Chunk* createUserChunk(size_t size = 0);
  59     DbRetVal deleteUserChunk(Chunk *chunk);
  60
  61
  62     DbRetVal createHashIndex(const char *indName, const char *tableName,
  63                         FieldNameList &fldList, int bucketSize);
  64     void initHashBuckets(Bucket *buck, int bucketSize);
  65
  66
  67     public:
  68
  69     Database* db() { return db_; }
  70     Database* sysDb() { return systemDatabase_; }
  71     void setSysDb(Database *db) { systemDatabase_ = db; }
  72     void setDb(Database *db) { db_ = db; }
  73
  74     TransactionManager* txnMgr() { return tMgr_; }
  75     LockManager* lockMgr() { return lMgr_; }
  76
  77     //for user database file there is no limit for the number
  78     //of tables or chunks
  79     DbRetVal createDatabase(const char *name, size_t size);
  80     DbRetVal deleteDatabase(const char *name);
  81
  82     DbRetVal openDatabase(const char *name);
  83     void closeDatabase();
  84
  85
  86
  87     DbRetVal createTable(const char *name, TableDef &def);
  88     DbRetVal dropTable(const char *name);
  89     Table* openTable(const char *name);
  90     void closeTable(Table *table);
  91     DbRetVal createIndex(const char *indName, IndexInitInfo *info);
  92     DbRetVal dropIndex(const char *name);
  93
  94
  95     friend class SessionImpl;
  96 };
  97 #endif