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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "dba_internal.hpp"
struct DBA__BulkReadData {
const DBA_Binding_t * const * pBindings; // The bindings
DBA_BulkReadResultSet_t * pData; // The data
int NbRows; // NbRows per binding
int NbBindings; // NbBindings
int TotalRows; // Total rows (NbRows*NbBindings)
DBA_AsyncCallbackFn_t CbFunc; // Users callback
DBA_ReqId_t RequestId; // Users request id
DBA_Error_t Status; // Request status
DBA_ErrorCode_t ErrorCode; /**< Request error
Only valid if request is
aborted */
int RowsSubmitted; // No of read sent to NDB
int RowsAcknowledged; // No of read responses
int OpPerTrans; // Operations per transaction
struct Index {
int binding;
int row;
int datarow;
void init() { row = binding = datarow = 0;}
void next(int rows) {
datarow++; row++;
if(row == rows){ row = 0; binding++; }
}
};
Index lastSend;
Index nextSend;
/**
* If "simple" bulkread
* use this storage
*/
const DBA_Binding_t * bindings[1];
DBA__BulkReadData() {
RequestId = DBA_INVALID_REQID;
}
void ProcessBulkRead();
bool ProcessCallback(int errorCode, NdbConnection * connection);
};
static
void
NewtonCallback(int errorCode,
NdbConnection * connection,
void * anyObject){
DBA__BulkReadData * brd = (DBA__BulkReadData*)anyObject;
brd->ProcessCallback(errorCode, connection);
DBA__TheNdb->closeTransaction(connection);
if(brd->RowsSubmitted == brd->TotalRows){
/**
* The entire bulk read is finished,
* call users callback
*/
DBA_ReqId_t reqId = brd->RequestId;
// Invalidate BulkReadData
brd->RequestId = DBA_INVALID_REQID;
brd->CbFunc(reqId, brd->Status, brd->ErrorCode);
return;
}
brd->ProcessBulkRead();
}
/**
* A BulkReadData structure
*/
static DBA__BulkReadData theBRD;
#define CHECK_BINDINGS(Bindings) \
if(!DBA__ValidBinding(Bindings)){ \
DBA__SetLatestError(DBA_APPLICATION_ERROR, 0, "Invalid bindings"); \
return DBA_INVALID_REQID; \
}
#define CHECK_BINDINGS2(Bindings, NbBindings) \
if(!DBA__ValidBindings(Bindings, NbBindings)){ \
DBA__SetLatestError(DBA_APPLICATION_ERROR, 0, "Invalid bindings"); \
return DBA_INVALID_REQID; \
}
DBA_ReqId_t
DBA_BulkReadRows(const DBA_Binding_t * pBindings,
DBA_BulkReadResultSet_t pData[],
int NbRows,
DBA_AsyncCallbackFn_t CbFunc ){
CHECK_BINDINGS(pBindings);
DBA__BulkReadData * brd = &theBRD;
NdbMutex_Lock(DBA__TheNewtonMutex);
if(brd->RequestId != DBA_INVALID_REQID){
DBA__SetLatestError(DBA_ERROR, 0,
"DBA only permits 1 concurrent bulkread");
NdbMutex_Unlock(DBA__TheNewtonMutex);
return DBA_ERROR;
}
theBRD.RequestId = 1;
/**
*
*/
brd->bindings[0] = pBindings;
brd->pBindings = brd->bindings;
brd->pData = pData;
/**
* Control data
*/
brd->NbRows = NbRows;
brd->NbBindings = 1;
brd->TotalRows = NbRows;
brd->CbFunc = CbFunc;
brd->Status = DBA_NO_ERROR;
brd->ErrorCode = 0;
brd->OpPerTrans = DBA__BulkReadCount;
brd->RowsSubmitted = 0;
brd->RowsAcknowledged = 0;
brd->lastSend.init();
brd->nextSend.init();
brd->ProcessBulkRead();
NdbMutex_Unlock(DBA__TheNewtonMutex);
return brd->RequestId;
}
DBA_ReqId_t
DBA_BulkMultiReadRows(const DBA_Binding_t * const * pBindings,
DBA_BulkReadResultSet_t pData[],
int NbBindings,
int NbRows,
DBA_AsyncCallbackFn_t CbFunc ){
CHECK_BINDINGS2(pBindings, NbBindings);
DBA__BulkReadData * brd = &theBRD;
NdbMutex_Lock(DBA__TheNewtonMutex);
if(brd->RequestId != DBA_INVALID_REQID){
DBA__SetLatestError(DBA_ERROR, 0,
"DBA only permits 1 concurrent bulkread");
NdbMutex_Unlock(DBA__TheNewtonMutex);
return DBA_ERROR;
}
brd->RequestId = 1;
/**
*
*/
brd->pBindings = pBindings;
brd->pData = pData;
/**
* Control data
*/
brd->NbRows = NbRows;
brd->NbBindings = NbBindings;
brd->TotalRows = (NbRows * NbBindings);
brd->CbFunc = CbFunc;
brd->Status = DBA_NO_ERROR;
brd->ErrorCode = 0;
brd->OpPerTrans = DBA__BulkReadCount;
brd->RowsSubmitted = 0;
brd->RowsAcknowledged = 0;
brd->lastSend.init();
brd->nextSend.init();
brd->ProcessBulkRead();
NdbMutex_Unlock(DBA__TheNewtonMutex);
return brd->RequestId;
}
bool
DBA__BulkReadData::ProcessCallback(int errorCode, NdbConnection * con){
Index tmp = lastSend;
const NdbOperation * op = con->getNextCompletedOperation(0);
for(int i = 0; i<OpPerTrans && RowsAcknowledged < RowsSubmitted; i++){
require(op != 0);
if(op->getNdbError().code == 0)
pData[tmp.datarow].RowFoundIndicator = 1;
else
pData[tmp.datarow].RowFoundIndicator = 0;
RowsAcknowledged++;
tmp.next(NbRows);
op = con->getNextCompletedOperation(op);
}
return true;
}
void
DBA__BulkReadData::ProcessBulkRead(){
NdbConnection * con = DBA__TheNdb->startTransaction();
Index tmp = nextSend;
for(int i = 0; i<OpPerTrans && RowsSubmitted < TotalRows; i++){
const DBA_Binding_t * binding = pBindings[tmp.binding];
void * data = pData[tmp.datarow].DataPtr;
NdbOperation * op = con->getNdbOperation(binding->tableName);
op->simpleRead();
require(DBA__EqualGetValue(op, binding, data));
RowsSubmitted++;
tmp.next(NbRows);
}
con->executeAsynchPrepare(Commit,
NewtonCallback,
(void*)this,
CommitAsMuchAsPossible);
lastSend = nextSend;
nextSend = tmp;
}
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