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|
/************ JMONGO FAM C++ Program Source Code File (.CPP) ***********/
/* PROGRAM NAME: jmgfam.cpp */
/* ------------- */
/* Version 1.0 */
/* */
/* COPYRIGHT: */
/* ---------- */
/* (C) Copyright to the author Olivier BERTRAND 20017 */
/* */
/* WHAT THIS PROGRAM DOES: */
/* ----------------------- */
/* This program are the Java MongoDB access method classes. */
/* */
/***********************************************************************/
/***********************************************************************/
/* Include relevant sections of the System header files. */
/***********************************************************************/
#include "my_global.h"
#if defined(__WIN__)
//#include <io.h>
//#include <fcntl.h>
//#include <errno.h>
#if defined(__BORLANDC__)
#define __MFC_COMPAT__ // To define min/max as macro
#endif // __BORLANDC__
//#include <windows.h>
#else // !__WIN__
#if defined(UNIX) || defined(UNIV_LINUX)
//#include <errno.h>
#include <unistd.h>
//#if !defined(sun) // Sun has the ftruncate fnc.
//#define USETEMP // Force copy mode for DELETE
//#endif // !sun
#else // !UNIX
//#include <io.h>
#endif // !UNIX
//#include <fcntl.h>
#endif // !__WIN__
/***********************************************************************/
/* 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"
#include "tabjson.h"
#include "jmgfam.h"
#if defined(UNIX) || defined(UNIV_LINUX)
#include "osutil.h"
//#define _fileno fileno
//#define _O_RDONLY O_RDONLY
#endif
/* --------------------------- Class JMGFAM -------------------------- */
/***********************************************************************/
/* Constructors. */
/***********************************************************************/
JMGFAM::JMGFAM(PJDEF tdp) : DOSFAM((PDOSDEF)NULL)
{
Jcp = NULL;
//Client = NULL;
//Database = NULL;
//Collection = NULL;
//Cursor = NULL;
//Query = NULL;
//Opts = NULL;
Ops.Driver = tdp->Schema;
Ops.Url = tdp->Uri;
Ops.User = NULL;
Ops.Pwd = NULL;
Ops.Scrollable = false;
Ops.Fsize = 0;
Ops.Version = tdp->Version;
To_Fbt = NULL;
Mode = MODE_ANY;
Uristr = tdp->Uri;
Db_name = tdp->Schema;
Coll_name = tdp->Collname;
Options = tdp->Options;
Filter = tdp->Filter;
Wrapname = tdp->Wrapname;
Done = false;
Pipe = tdp->Pipe;
Version = tdp->Version;
Lrecl = tdp->Lrecl + tdp->Ending;
Curpos = 0;
} // end of JMGFAM standard constructor
JMGFAM::JMGFAM(PJMGFAM tdfp) : DOSFAM(tdfp)
{
//Client = tdfp->Client;
//Database = NULL;
//Collection = tdfp->Collection;
//Cursor = tdfp->Cursor;
//Query = tdfp->Query;
//Opts = tdfp->Opts;
Ops = tdfp->Ops;
To_Fbt = tdfp->To_Fbt;
Mode = tdfp->Mode;
Uristr = tdfp->Uristr;
Db_name = tdfp->Db_name;
Coll_name = tdfp->Coll_name;
Options = tdfp->Options;
Filter = NULL;
Wrapname = tdfp->Wrapname;
Done = tdfp->Done;
Pipe = tdfp->Pipe;
Version = tdfp->Version;
} // end of JMGFAM copy constructor
/***********************************************************************/
/* Reset: reset position values at the beginning of file. */
/***********************************************************************/
void JMGFAM::Reset(void)
{
TXTFAM::Reset();
Fpos = Tpos = Spos = 0;
} // end of Reset
/***********************************************************************/
/* MGO GetFileLength: returns file size in number of bytes. */
/***********************************************************************/
int JMGFAM::GetFileLength(PGLOBAL g)
{
return 0;
} // end of GetFileLength
/***********************************************************************/
/* Cardinality: returns table cardinality in number of rows. */
/* This function can be called with a null argument to test the */
/* availability of Cardinality implementation (1 yes, 0 no). */
/***********************************************************************/
int JMGFAM::Cardinality(PGLOBAL g)
{
if (!g)
return 1;
return (!Init(g)) ? Jcp->CollSize(g) : 0;
} // end of Cardinality
/***********************************************************************/
/* Note: This function is not really implemented yet. */
/***********************************************************************/
int JMGFAM::MaxBlkSize(PGLOBAL, int s)
{
return s;
} // end of MaxBlkSize
/***********************************************************************/
/* Init: initialize MongoDB processing. */
/***********************************************************************/
bool JMGFAM::Init(PGLOBAL g)
{
if (Done)
return false;
/*********************************************************************/
/* Open an JDBC connection for this table. */
/* Note: this may not be the proper way to do. Perhaps it is better */
/* to test whether a connection is already open for this datasource */
/* and if so to allocate just a new result set. But this only for */
/* drivers allowing concurency in getting results ??? */
/*********************************************************************/
if (!Jcp)
Jcp = new(g) JMgoConn(g, Coll_name, Wrapname);
else if (Jcp->IsOpen())
Jcp->Close();
if (Jcp->Connect(&Ops))
return true;
Done = true;
return false;
} // end of Init
/***********************************************************************/
/* OpenTableFile: Open a MongoDB table. */
/***********************************************************************/
bool JMGFAM::OpenTableFile(PGLOBAL g)
{
Mode = Tdbp->GetMode();
if (Pipe && Mode != MODE_READ) {
strcpy(g->Message, "Pipeline tables are read only");
return true;
} // endif Pipe
if (Init(g))
return true;
if (Jcp->GetMethodId(g, Mode))
return true;
if (Mode == MODE_DELETE && !Tdbp->GetNext()) {
// Delete all documents
if (!Jcp->MakeCursor(g, Tdbp, "all", Filter, false))
if (Jcp->DocDelete(g, true) == RC_OK)
return false;
return true;
} // endif Mode
if (Mode == MODE_INSERT)
Jcp->MakeColumnGroups(g, Tdbp);
if (Mode != MODE_UPDATE)
return Jcp->MakeCursor(g, Tdbp, Options, Filter, Pipe);
return false;
} // end of OpenTableFile
/***********************************************************************/
/* GetRowID: return the RowID of last read record. */
/***********************************************************************/
int JMGFAM::GetRowID(void)
{
return Rows;
} // end of GetRowID
/***********************************************************************/
/* GetPos: return the position of last read record. */
/***********************************************************************/
int JMGFAM::GetPos(void)
{
return Fpos;
} // end of GetPos
/***********************************************************************/
/* GetNextPos: return the position of next record. */
/***********************************************************************/
int JMGFAM::GetNextPos(void)
{
return Fpos; // TODO
} // end of GetNextPos
/***********************************************************************/
/* SetPos: Replace the table at the specified position. */
/***********************************************************************/
bool JMGFAM::SetPos(PGLOBAL g, int pos)
{
Fpos = pos;
Placed = true;
return false;
} // end of SetPos
/***********************************************************************/
/* Record file position in case of UPDATE or DELETE. */
/***********************************************************************/
bool JMGFAM::RecordPos(PGLOBAL g)
{
strcpy(g->Message, "JMGFAM::RecordPos NIY");
return true;
} // end of RecordPos
/***********************************************************************/
/* Initialize Fpos and the current position for indexed DELETE. */
/***********************************************************************/
int JMGFAM::InitDelete(PGLOBAL g, int fpos, int spos)
{
strcpy(g->Message, "JMGFAM::InitDelete NIY");
return RC_FX;
} // end of InitDelete
/***********************************************************************/
/* Skip one record in file. */
/***********************************************************************/
int JMGFAM::SkipRecord(PGLOBAL g, bool header)
{
return RC_OK; // Dummy
} // end of SkipRecord
/***********************************************************************/
/* ReadBuffer: Get next document from a collection. */
/***********************************************************************/
int JMGFAM::ReadBuffer(PGLOBAL g)
{
int rc = RC_FX;
if (!Curpos && Mode == MODE_UPDATE)
if (Jcp->MakeCursor(g, Tdbp, Options, Filter, Pipe))
return RC_FX;
if (++CurNum >= Rbuf) {
Rbuf = Jcp->Fetch();
Curpos++;
CurNum = 0;
} // endif CurNum
if (Rbuf > 0) {
PSZ str = Jcp->GetDocument();
if (str) {
if (trace(1))
htrc("%s\n", str);
strncpy(Tdbp->GetLine(), str, Lrecl);
rc = RC_OK;
} else
strcpy(g->Message, "Null document");
} else if (!Rbuf)
rc = RC_EF;
return rc;
} // end of ReadBuffer
/***********************************************************************/
/* WriteBuffer: File write routine for MGO access method. */
/***********************************************************************/
int JMGFAM::WriteBuffer(PGLOBAL g)
{
int rc = RC_OK;
if (Mode == MODE_INSERT) {
rc = Jcp->DocWrite(g);
} else if (Mode == MODE_DELETE) {
rc = Jcp->DocDelete(g, false);
} else if (Mode == MODE_UPDATE) {
rc = Jcp->DocUpdate(g, Tdbp);
} // endif Mode
return rc;
} // end of WriteBuffer
/***********************************************************************/
/* Data Base delete line routine for MGO and BLK access methods. */
/***********************************************************************/
int JMGFAM::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 JMGFAM::CloseTableFile(PGLOBAL g, bool)
{
Jcp->Close();
Done = false;
} // end of CloseTableFile
/***********************************************************************/
/* Rewind routine for MGO access method. */
/***********************************************************************/
void JMGFAM::Rewind(void)
{
Jcp->Rewind();
} // end of Rewind
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