void WriteBatchExecutor::execUpdate( const BatchItemRef& updateItem,
BSONObj* upsertedId,
WriteErrorDetail** error ) {
// BEGIN CURRENT OP
scoped_ptr<CurOp> currentOp( beginCurrentOp( _client, updateItem ) );
incOpStats( updateItem );
WriteOpResult result;
multiUpdate( _txn, updateItem, &result );
if ( !result.getStats().upsertedID.isEmpty() ) {
*upsertedId = result.getStats().upsertedID;
}
// END CURRENT OP
incWriteStats( updateItem, result.getStats(), result.getError(), currentOp.get() );
finishCurrentOp( _txn, _client, currentOp.get(), result.getError() );
if ( result.getError() ) {
result.getError()->setIndex( updateItem.getItemIndex() );
*error = result.releaseError();
}
}
void WriteBatchExecutor::execRemove( const BatchItemRef& removeItem,
WriteErrorDetail** error ) {
// Removes are similar to updates, but page faults are handled externally
// BEGIN CURRENT OP
scoped_ptr<CurOp> currentOp( beginCurrentOp( _client, removeItem ) );
incOpStats( removeItem );
WriteOpResult result;
while ( true ) {
multiRemove( removeItem, &result );
if ( !result.fault ) {
incWriteStats( removeItem, result.stats, result.error, currentOp.get() );
break;
}
//
// Check page fault out of lock
//
dassert( result.fault );
result.fault->touch();
result.reset();
}
// END CURRENT OP
finishCurrentOp( _client, currentOp.get(), result.error );
if ( result.error ) {
result.error->setIndex( removeItem.getItemIndex() );
*error = result.releaseError();
}
}
void WriteBatchExecutor::execInserts( const BatchedCommandRequest& request,
std::vector<WriteErrorDetail*>* errors ) {
// Bulk insert is a bit different from other bulk operations in that multiple request docs
// can be processed at once inside the write lock.
const NamespaceString nss( request.getTargetingNS() );
scoped_ptr<BatchItemRef> currInsertItem( new BatchItemRef( &request, 0 ) );
// Go through our request and do some preprocessing on insert documents outside the lock to
// validate and put them in a normalized form - i.e. put _id in front and fill in
// timestamps. The insert document may also be invalid.
// TODO: Might be more efficient to do in batches.
vector<StatusWith<BSONObj> > normalInserts;
normalizeInserts( request, &normalInserts );
while ( currInsertItem->getItemIndex() < static_cast<int>( request.sizeWriteOps() ) ) {
WriteOpResult currResult;
// Don't (re-)acquire locks and create database until it's necessary
if ( !normalInserts[currInsertItem->getItemIndex()].isOK() ) {
currResult.error =
toWriteError( normalInserts[currInsertItem->getItemIndex()].getStatus() );
}
else {
PageFaultRetryableSection pFaultSection;
////////////////////////////////////
Lock::DBWrite writeLock( nss.ns() );
////////////////////////////////////
// Check version inside of write lock
if ( checkIsMasterForCollection( nss, &currResult.error )
&& checkShardVersion( &shardingState, request, &currResult.error )
&& checkIndexConstraints( &shardingState, request, &currResult.error ) ) {
//
// Get the collection for the insert
//
scoped_ptr<Client::Context> writeContext;
Collection* collection = NULL;
try {
// Context once we're locked, to set more details in currentOp()
// TODO: better constructor?
writeContext.reset( new Client::Context( request.getNS(),
storageGlobalParams.dbpath,
false /* don't check version */) );
Database* database = writeContext->db();
dassert( database );
collection = database->getCollection( nss.ns() );
if ( !collection ) {
// Implicitly create if it doesn't exist
collection = database->createCollection( nss.ns() );
if ( !collection ) {
currResult.error =
toWriteError( Status( ErrorCodes::InternalError,
"could not create collection" ) );
}
}
}
catch ( const DBException& ex ) {
Status status(ex.toStatus());
if (ErrorCodes::isInterruption(status.code())) {
throw;
}
currResult.error = toWriteError(status);
}
//
// Perform writes inside write lock
//
while ( collection
&& currInsertItem->getItemIndex()
< static_cast<int>( request.sizeWriteOps() ) ) {
//
// BEGIN CURRENT OP
//
scoped_ptr<CurOp> currentOp( beginCurrentOp( _client, *currInsertItem ) );
incOpStats( *currInsertItem );
// Get the actual document we want to write, assuming it's valid
const StatusWith<BSONObj>& normalInsert = //
normalInserts[currInsertItem->getItemIndex()];
const BSONObj& normalInsertDoc =
normalInsert.getValue().isEmpty() ?
currInsertItem->getDocument() : normalInsert.getValue();
if ( !normalInsert.isOK() ) {
// This insert failed on preprocessing
currResult.error = toWriteError( normalInsert.getStatus() );
}
else if ( !request.isInsertIndexRequest() ) {
// Try the insert
singleInsert( *currInsertItem,
normalInsertDoc,
collection,
&currResult );
}
else {
// Try the create index
singleCreateIndex( *currInsertItem,
normalInsertDoc,
collection,
&currResult );
}
//
// END CURRENT OP
//
finishCurrentOp( _client, currentOp.get(), currResult.error );
// Faults release the write lock
if ( currResult.fault )
break;
// In general, we might have stats and errors
incWriteStats( *currInsertItem,
currResult.stats,
currResult.error,
currentOp.get() );
// Errors release the write lock
if ( currResult.error )
break;
// Increment in the write lock and reset the stats for next time
currInsertItem.reset( new BatchItemRef( &request,
currInsertItem->getItemIndex()
+ 1 ) );
currResult.reset();
// Destruct curop so that our parent curop is restored, so that we
// record the yield count in the parent.
currentOp.reset(NULL);
// yield sometimes
int micros = ClientCursor::suggestYieldMicros();
if (micros > 0) {
ClientCursor::staticYield(micros, "", NULL);
}
}
}
} // END WRITE LOCK
//
// Store the current error if it exists
//
if ( currResult.error ) {
errors->push_back( currResult.releaseError() );
errors->back()->setIndex( currInsertItem->getItemIndex() );
// Break early for ordered batches
if ( request.getOrdered() )
break;
}
//
// Fault or increment
//
if ( currResult.fault ) {
// Check page fault out of lock
currResult.fault->touch();
}
else {
// Increment if not a fault
currInsertItem.reset( new BatchItemRef( &request,
currInsertItem->getItemIndex() + 1 ) );
}
}
}
void WriteBatchExecutor::execRemove( const BatchItemRef& removeItem,
WriteErrorDetail** error ) {
// Removes are similar to updates, but page faults are handled externally
const BatchedCommandRequest& request = *removeItem.getRequest();
const NamespaceString nss( removeItem.getRequest()->getNS() );
// BEGIN CURRENT OP
scoped_ptr<CurOp> currentOp( beginCurrentOp( _client, removeItem ) );
incOpStats( removeItem );
WriteOpResult result;
while ( true ) {
{
// NOTE: Deletes will not fault outside the lock once any data has been written
PageFaultRetryableSection pFaultSection;
///////////////////////////////////////////
Lock::DBWrite writeLock( nss.ns() );
///////////////////////////////////////////
// Check version once we're locked
if ( !checkShardVersion( &shardingState, request, &result.error ) ) {
// Version error
break;
}
// Context once we're locked, to set more details in currentOp()
// TODO: better constructor?
Client::Context writeContext( nss.ns(),
storageGlobalParams.dbpath,
false /* don't check version */);
multiRemove( removeItem, &result );
if ( !result.fault ) {
incWriteStats( removeItem, result.stats, result.error, currentOp.get() );
break;
}
}
//
// Check page fault out of lock
//
dassert( result.fault );
result.fault->touch();
result.reset();
}
// END CURRENT OP
finishCurrentOp( _client, currentOp.get(), result.error );
if ( result.error ) {
result.error->setIndex( removeItem.getItemIndex() );
*error = result.releaseError();
}
}