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/************** CMGFAM C++ Program Source Code File (.CPP) *************/
/* PROGRAM NAME: cmgfam.cpp */
/* ------------- */
/* Version 1.5 */
/* */
/* COPYRIGHT: */
/* ---------- */
/* (C) Copyright to the author Olivier BERTRAND 20017 - 2020 */
/* */
/* WHAT THIS PROGRAM DOES: */
/* ----------------------- */
/* This program are the MongoDB access method classes. */
/* */
/***********************************************************************/
/***********************************************************************/
/* Include relevant sections of the System header files. */
/***********************************************************************/
#include "my_global.h"
/***********************************************************************/
/* Include application header files: */
/* global.h is header containing all global declarations. */
/* plgdbsem.h is header containing the DB application declarations. */
/* filamtxt.h is header containing the file AM classes declarations. */
/***********************************************************************/
#include "global.h"
#include "plgdbsem.h"
#include "reldef.h"
#include "filamtxt.h"
#include "tabdos.h"
#if defined(BSON_SUPPORT)
#include "tabbson.h"
#else
#include "tabjson.h"
#endif // BSON_SUPPORT
#include "cmgfam.h"
#if defined(UNIX) || defined(UNIV_LINUX)
#include "osutil.h"
#endif
/* --------------------------- Class CMGFAM -------------------------- */
/***********************************************************************/
/* Constructors. */
/***********************************************************************/
CMGFAM::CMGFAM(PJDEF tdp) : DOSFAM((PDOSDEF)NULL)
{
Cmgp = NULL;
Pcg.Tdbp = NULL;
if (tdp) {
Pcg.Uristr = tdp->Uri;
Pcg.Db_name = tdp->Schema;
Pcg.Coll_name = tdp->Collname;
Pcg.Options = tdp->Options;
Pcg.Filter = tdp->Filter;
Pcg.Line = NULL;
Pcg.Pipe = tdp->Pipe && tdp->Options != NULL;
Lrecl = tdp->Lrecl + tdp->Ending;
} else {
Pcg.Uristr = NULL;
Pcg.Db_name = NULL;
Pcg.Coll_name = NULL;
Pcg.Options = NULL;
Pcg.Filter = NULL;
Pcg.Line = NULL;
Pcg.Pipe = false;
Lrecl = 0;
} // endif tdp
To_Fbt = NULL;
Mode = MODE_ANY;
Done = false;
} // end of CMGFAM standard constructor
#if defined(BSON_SUPPORT)
/***********************************************************************/
/* Constructors. */
/***********************************************************************/
CMGFAM::CMGFAM(PBDEF tdp) : DOSFAM((PDOSDEF)NULL)
{
Cmgp = NULL;
Pcg.Tdbp = NULL;
if (tdp) {
Pcg.Uristr = tdp->Uri;
Pcg.Db_name = tdp->Schema;
Pcg.Coll_name = tdp->Collname;
Pcg.Options = tdp->Options;
Pcg.Filter = tdp->Filter;
Pcg.Line = NULL;
Pcg.Pipe = tdp->Pipe && tdp->Options != NULL;
Lrecl = tdp->Lrecl + tdp->Ending;
} else {
Pcg.Uristr = NULL;
Pcg.Db_name = NULL;
Pcg.Coll_name = NULL;
Pcg.Options = NULL;
Pcg.Filter = NULL;
Pcg.Line = NULL;
Pcg.Pipe = false;
Lrecl = 0;
} // endif tdp
To_Fbt = NULL;
Mode = MODE_ANY;
Done = false;
} // end of CMGFAM standard constructor
#endif // BSON_SUPPORT
CMGFAM::CMGFAM(PCMGFAM tdfp) : DOSFAM(tdfp)
{
Cmgp = tdfp->Cmgp;
Pcg = tdfp->Pcg;
To_Fbt = tdfp->To_Fbt;
Mode = tdfp->Mode;
Done = tdfp->Done;
} // end of CMGFAM copy constructor
/***********************************************************************/
/* Reset: reset position values at the beginning of file. */
/***********************************************************************/
void CMGFAM::Reset(void)
{
TXTFAM::Reset();
Fpos = Tpos = Spos = 0;
} // end of Reset
/***********************************************************************/
/* MGO GetFileLength: returns file size in number of bytes. */
/***********************************************************************/
int CMGFAM::GetFileLength(PGLOBAL g)
{
return 0;
} // end of GetFileLength
/***********************************************************************/
/* Cardinality: returns the number of documents in the collection. */
/* This function can be called with a null argument to test the */
/* availability of Cardinality implementation (1 yes, 0 no). */
/***********************************************************************/
int CMGFAM::Cardinality(PGLOBAL g)
{
if (!g)
return 1;
return (!Init(g)) ? Cmgp->CollSize(g) : 0;
} // end of Cardinality
/***********************************************************************/
/* Note: This function is not really implemented yet. */
/***********************************************************************/
int CMGFAM::MaxBlkSize(PGLOBAL, int s)
{
return s;
} // end of MaxBlkSize
/***********************************************************************/
/* Init: initialize MongoDB processing. */
/***********************************************************************/
bool CMGFAM::Init(PGLOBAL g)
{
if (Done)
return false;
/*********************************************************************/
/* Open an C connection for this table. */
/*********************************************************************/
if (!Cmgp) {
Pcg.Tdbp = Tdbp;
Cmgp = new(g) CMgoConn(g, &Pcg);
} else if (Cmgp->IsConnected())
Cmgp->Close();
if (Cmgp->Connect(g))
return true;
Done = true;
return false;
} // end of Init
/***********************************************************************/
/* OpenTableFile: Open a MongoDB table. */
/***********************************************************************/
bool CMGFAM::OpenTableFile(PGLOBAL g)
{
Mode = Tdbp->GetMode();
if (Pcg.Pipe && Mode != MODE_READ) {
strcpy(g->Message, "Pipeline tables are read only");
return true;
} // endif Pipe
if (Init(g))
return true;
if (Mode == MODE_DELETE && !Tdbp->GetNext())
// Delete all documents
return Cmgp->DocDelete(g);
else if (Mode == MODE_INSERT)
Cmgp->MakeColumnGroups(g);
return false;
} // end of OpenTableFile
/***********************************************************************/
/* GetRowID: return the RowID of last read record. */
/***********************************************************************/
int CMGFAM::GetRowID(void)
{
return Rows;
} // end of GetRowID
/***********************************************************************/
/* GetPos: return the position of last read record. */
/***********************************************************************/
int CMGFAM::GetPos(void)
{
return Fpos;
} // end of GetPos
/***********************************************************************/
/* GetNextPos: return the position of next record. */
/***********************************************************************/
int CMGFAM::GetNextPos(void)
{
return Fpos; // TODO
} // end of GetNextPos
/***********************************************************************/
/* SetPos: Replace the table at the specified position. */
/***********************************************************************/
bool CMGFAM::SetPos(PGLOBAL g, int pos)
{
Fpos = pos;
Placed = true;
return false;
} // end of SetPos
/***********************************************************************/
/* Record file position in case of UPDATE or DELETE. */
/***********************************************************************/
bool CMGFAM::RecordPos(PGLOBAL g)
{
strcpy(g->Message, "CMGFAM::RecordPos NIY");
return true;
} // end of RecordPos
/***********************************************************************/
/* Initialize Fpos and the current position for indexed DELETE. */
/***********************************************************************/
int CMGFAM::InitDelete(PGLOBAL g, int fpos, int spos)
{
strcpy(g->Message, "CMGFAM::InitDelete NIY");
return RC_FX;
} // end of InitDelete
/***********************************************************************/
/* Skip one record in file. */
/***********************************************************************/
int CMGFAM::SkipRecord(PGLOBAL g, bool header)
{
return RC_OK; // Dummy
} // end of SkipRecord
/***********************************************************************/
/* ReadBuffer: Get next document from a collection. */
/***********************************************************************/
int CMGFAM::ReadBuffer(PGLOBAL g)
{
int rc = Cmgp->ReadNext(g);
if (rc != RC_OK)
return rc;
strncpy(Tdbp->GetLine(), Cmgp->GetDocument(g), Lrecl);
return RC_OK;
} // end of ReadBuffer
/***********************************************************************/
/* WriteBuffer: File write routine for MGO access method. */
/***********************************************************************/
int CMGFAM::WriteBuffer(PGLOBAL g)
{
Pcg.Line = Tdbp->GetLine();
return Cmgp->Write(g);
} // end of WriteBuffer
/***********************************************************************/
/* Data Base delete line routine for MGO and BLK access methods. */
/***********************************************************************/
int CMGFAM::DeleteRecords(PGLOBAL g, int irc)
{
return (irc == RC_OK) ? WriteBuffer(g) : RC_OK;
} // end of DeleteRecords
/***********************************************************************/
/* Table file close routine for MGO access method. */
/***********************************************************************/
void CMGFAM::CloseTableFile(PGLOBAL g, bool)
{
Cmgp->Close();
Done = false;
} // end of CloseTableFile
/***********************************************************************/
/* Rewind routine for MGO access method. */
/***********************************************************************/
void CMGFAM::Rewind(void)
{
Cmgp->Rewind();
} // end of Rewind
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