C++ BatchedUpsertDetail类代码示例

    void BatchSafeWriter::safeWriteBatch( DBClientBase* conn,
                                          const BatchedCommandRequest& request,
                                          BatchedCommandResponse* response ) {

        // N starts at zero, and we add to it for each item
        response->setN( 0 );

        for ( size_t i = 0; i < request.sizeWriteOps(); ++i ) {

            BatchItemRef itemRef( &request, static_cast<int>( i ) );
            LastError lastError;

            _safeWriter->safeWrite( conn, itemRef, &lastError );

            // Register the error if we need to
            BatchedErrorDetail* batchError = lastErrorToBatchError( lastError );
            if ( batchError ) {
                batchError->setIndex( i );
                response->addToErrDetails( batchError );
            }

            response->setN( response->getN() + lastError.nObjects );

            if ( !lastError.upsertedId.isEmpty() ) {
                BatchedUpsertDetail* upsertedId = new BatchedUpsertDetail;
                upsertedId->setIndex( i );
                upsertedId->setUpsertedID( lastError.upsertedId );
                response->addToUpsertDetails( upsertedId );
            }

            // Break on first error if we're ordered
            if ( request.getOrdered() && BatchSafeWriter::isFailedOp( lastError ) ) break;
        }

        if ( request.sizeWriteOps() == 1 && response->isErrDetailsSet()
             && !response->isErrCodeSet() ) {

            // Promote single error to batch error
            const BatchedErrorDetail* error = response->getErrDetailsAt( 0 );
            response->setErrCode( error->getErrCode() );
            if ( error->isErrInfoSet() ) response->setErrInfo( error->getErrInfo() );
            response->setErrMessage( error->getErrMessage() );

            response->unsetErrDetails();
        }

        if ( request.sizeWriteOps() == 1 && response->isUpsertDetailsSet() ) {

            // Promote single upsert to batch upsert
            const BatchedUpsertDetail* upsertedId = response->getUpsertDetailsAt( 0 );
            response->setSingleUpserted( upsertedId->getUpsertedID() );

            response->unsetUpsertDetails();
        }

        response->setOk( !response->isErrCodeSet() );
        dassert( response->isValid( NULL ) );
    }

    void WriteBatchExecutor::bulkExecute( const BatchedCommandRequest& request,
                                          std::vector<BatchedUpsertDetail*>* upsertedIds,
                                          std::vector<WriteErrorDetail*>* errors ) {

        if ( request.getBatchType() == BatchedCommandRequest::BatchType_Insert ) {
            execInserts( request, errors );
        }
        else if ( request.getBatchType() == BatchedCommandRequest::BatchType_Update ) {
            for ( size_t i = 0; i < request.sizeWriteOps(); i++ ) {

                WriteErrorDetail* error = NULL;
                BSONObj upsertedId;
                execUpdate( BatchItemRef( &request, i ), &upsertedId, &error );

                if ( !upsertedId.isEmpty() ) {
                    BatchedUpsertDetail* batchUpsertedId = new BatchedUpsertDetail;
                    batchUpsertedId->setIndex( i );
                    batchUpsertedId->setUpsertedID( upsertedId );
                    upsertedIds->push_back( batchUpsertedId );
                }

                if ( error ) {
                    errors->push_back( error );
                    if ( request.getOrdered() )
                        break;
                }
            }
        }
        else {
            dassert( request.getBatchType() == BatchedCommandRequest::BatchType_Delete );
            for ( size_t i = 0; i < request.sizeWriteOps(); i++ ) {

                WriteErrorDetail* error = NULL;
                execRemove( BatchItemRef( &request, i ), &error );

                if ( error ) {
                    errors->push_back( error );
                    if ( request.getOrdered() )
                        break;
                }
            }
        }

        // Fill in stale version errors for unordered batches (update/delete can't do this on own)
        if ( !errors->empty() && !request.getOrdered() ) {

            const WriteErrorDetail* finalError = errors->back();

            if ( finalError->getErrCode() == ErrorCodes::StaleShardVersion ) {
                for ( size_t i = finalError->getIndex() + 1; i < request.sizeWriteOps(); i++ ) {
                    WriteErrorDetail* dupStaleError = new WriteErrorDetail;
                    finalError->cloneTo( dupStaleError );
                    errors->push_back( dupStaleError );
                }
            }
        }
    }

void BatchWriteOp::noteBatchResponse(const TargetedWriteBatch& targetedBatch,
                                     const BatchedCommandResponse& response,
                                     TrackedErrors* trackedErrors) {
    if (!response.getOk()) {
        WriteErrorDetail error;
        cloneCommandErrorTo(response, &error);

        // Treat command errors exactly like other failures of the batch
        // Note that no errors will be tracked from these failures - as-designed
        noteBatchError(targetedBatch, error);
        return;
    }

    dassert(response.getOk());

    // Stop tracking targeted batch
    _targeted.erase(&targetedBatch);

    // Increment stats for this batch
    incBatchStats(_clientRequest->getBatchType(), response, _stats.get());

    //
    // Assign errors to particular items.
    // Write Concern errors are stored and handled later.
    //

    // Special handling for write concern errors, save for later
    if (response.isWriteConcernErrorSet()) {
        unique_ptr<ShardWCError> wcError(
            new ShardWCError(targetedBatch.getEndpoint(), *response.getWriteConcernError()));
        _wcErrors.mutableVector().push_back(wcError.release());
    }

    vector<WriteErrorDetail*> itemErrors;

    // Handle batch and per-item errors
    if (response.isErrDetailsSet()) {
        // Per-item errors were set
        itemErrors.insert(
            itemErrors.begin(), response.getErrDetails().begin(), response.getErrDetails().end());

        // Sort per-item errors by index
        std::sort(itemErrors.begin(), itemErrors.end(), WriteErrorDetailComp());
    }

    //
    // Go through all pending responses of the op and sorted remote reponses, populate errors
    // This will either set all errors to the batch error or apply per-item errors as-needed
    //
    // If the batch is ordered, cancel all writes after the first error for retargeting.
    //

    bool ordered = _clientRequest->getOrdered();

    vector<WriteErrorDetail*>::iterator itemErrorIt = itemErrors.begin();
    int index = 0;
    WriteErrorDetail* lastError = NULL;
    for (vector<TargetedWrite*>::const_iterator it = targetedBatch.getWrites().begin();
         it != targetedBatch.getWrites().end();
         ++it, ++index) {
        const TargetedWrite* write = *it;
        WriteOp& writeOp = _writeOps[write->writeOpRef.first];

        dassert(writeOp.getWriteState() == WriteOpState_Pending);

        // See if we have an error for the write
        WriteErrorDetail* writeError = NULL;

        if (itemErrorIt != itemErrors.end() && (*itemErrorIt)->getIndex() == index) {
            // We have an per-item error for this write op's index
            writeError = *itemErrorIt;
            ++itemErrorIt;
        }

        // Finish the response (with error, if needed)
        if (NULL == writeError) {
            if (!ordered || !lastError) {
                writeOp.noteWriteComplete(*write);
            } else {
                // We didn't actually apply this write - cancel so we can retarget
                dassert(writeOp.getNumTargeted() == 1u);
                writeOp.cancelWrites(lastError);
            }
        } else {
            writeOp.noteWriteError(*write, *writeError);
            lastError = writeError;
        }
    }

    // Track errors we care about, whether batch or individual errors
    if (NULL != trackedErrors) {
        trackErrors(targetedBatch.getEndpoint(), itemErrors, trackedErrors);
    }

    // Track upserted ids if we need to
    if (response.isUpsertDetailsSet()) {
        const vector<BatchedUpsertDetail*>& upsertedIds = response.getUpsertDetails();
        for (vector<BatchedUpsertDetail*>::const_iterator it = upsertedIds.begin();
             it != upsertedIds.end();
             ++it) {
//.........这里部分代码省略.........

    void BatchSafeWriter::safeWriteBatch( DBClientBase* conn,
                                          const BatchedCommandRequest& request,
                                          BatchedCommandResponse* response ) {

        const NamespaceString nss( request.getNS() );

        // N starts at zero, and we add to it for each item
        response->setN( 0 );

        for ( size_t i = 0; i < request.sizeWriteOps(); ++i ) {

            // Break on first error if we're ordered
            if ( request.getOrdered() && response->isErrDetailsSet() )
                break;

            BatchItemRef itemRef( &request, static_cast<int>( i ) );
            bool isLastItem = ( i == request.sizeWriteOps() - 1 );

            BSONObj writeConcern;
            if ( isLastItem && request.isWriteConcernSet() ) {
                writeConcern = request.getWriteConcern();
                // Pre-2.4.2 mongods react badly to 'w' being set on config servers
                if ( nss.db() == "config" )
                    writeConcern = fixWCForConfig( writeConcern );
            }

            BSONObj gleResult;
            GLEErrors errors;
            Status status = _safeWriter->safeWrite( conn, itemRef, writeConcern, &gleResult );
            if ( status.isOK() ) {
                status = extractGLEErrors( gleResult, &errors );
            }

            if ( !status.isOK() ) {
                response->clear();
                response->setOk( false );
                response->setErrCode( status.code() );
                response->setErrMessage( status.reason() );
                return;
            }

            //
            // STATS HANDLING
            //

            GLEStats stats;
            extractGLEStats( gleResult, &stats );

            // Special case for making legacy "n" field result for insert match the write
            // command result.
            if ( request.getBatchType() == BatchedCommandRequest::BatchType_Insert
                 && !errors.writeError.get() ) {
                // n is always 0 for legacy inserts.
                dassert( stats.n == 0 );
                stats.n = 1;
            }

            response->setN( response->getN() + stats.n );

            if ( !stats.upsertedId.isEmpty() ) {
                BatchedUpsertDetail* upsertedId = new BatchedUpsertDetail;
                upsertedId->setIndex( i );
                upsertedId->setUpsertedID( stats.upsertedId );
                response->addToUpsertDetails( upsertedId );
            }

            response->setLastOp( stats.lastOp );

            //
            // WRITE ERROR HANDLING
            //

            // If any error occurs (except stale config) the previous GLE was not enforced
            bool enforcedWC = !errors.writeError.get()
                              || errors.writeError->getErrCode() == ErrorCodes::StaleShardVersion;

            // Save write error
            if ( errors.writeError.get() ) {
                errors.writeError->setIndex( i );
                response->addToErrDetails( errors.writeError.release() );
            }

            //
            // WRITE CONCERN ERROR HANDLING
            //

            // The last write is weird, since we enforce write concern and check the error through
            // the same GLE if possible.  If the last GLE was an error, the write concern may not
            // have been enforced in that same GLE, so we need to send another after resetting the
            // error.
            if ( isLastItem ) {

                // Try to enforce the write concern if everything succeeded (unordered or ordered)
                // OR if something succeeded and we're unordered.
                bool needToEnforceWC =
                    !response->isErrDetailsSet()
                    || ( !request.getOrdered()
                         && response->sizeErrDetails() < request.sizeWriteOps() );

                if ( !enforcedWC && needToEnforceWC ) {
//.........这里部分代码省略.........

    void BatchSafeWriter::safeWriteBatch( DBClientBase* conn,
                                          const BatchedCommandRequest& request,
                                          BatchedCommandResponse* response ) {

        const NamespaceString nss( request.getNS() );

        // N starts at zero, and we add to it for each item
        response->setN( 0 );

        // GLE path always sets nModified to -1 (sentinel) to indicate we should omit it later.
        response->setNModified(-1);

        for ( size_t i = 0; i < request.sizeWriteOps(); ++i ) {

            // Break on first error if we're ordered
            if ( request.getOrdered() && response->isErrDetailsSet() )
                break;

            BatchItemRef itemRef( &request, static_cast<int>( i ) );

            BSONObj gleResult;
            GLEErrors errors;
            Status status = _safeWriter->safeWrite( conn,
                                                    itemRef,
                                                    WriteConcernOptions::Acknowledged,
                                                    &gleResult );

            if ( status.isOK() ) {
                status = extractGLEErrors( gleResult, &errors );
            }

            if ( !status.isOK() ) {
                response->clear();
                response->setOk( false );
                response->setErrCode( ErrorCodes::RemoteResultsUnavailable );
                
                StringBuilder builder;
                builder << "could not get write error from safe write";
                builder << causedBy( status.toString() );
                response->setErrMessage( builder.str() );
                return;
            }

            if ( errors.wcError.get() ) {
                response->setWriteConcernError( errors.wcError.release() );
            }

            //
            // STATS HANDLING
            //

            GLEStats stats;
            extractGLEStats( gleResult, &stats );

            // Special case for making legacy "n" field result for insert match the write
            // command result.
            if ( request.getBatchType() == BatchedCommandRequest::BatchType_Insert
                 && !errors.writeError.get() ) {
                // n is always 0 for legacy inserts.
                dassert( stats.n == 0 );
                stats.n = 1;
            }

            response->setN( response->getN() + stats.n );

            if ( !stats.upsertedId.isEmpty() ) {
                BatchedUpsertDetail* upsertedId = new BatchedUpsertDetail;
                upsertedId->setIndex( i );
                upsertedId->setUpsertedID( stats.upsertedId );
                response->addToUpsertDetails( upsertedId );
            }

            response->setLastOp( stats.lastOp );

            // Save write error
            if ( errors.writeError.get() ) {
                errors.writeError->setIndex( i );
                response->addToErrDetails( errors.writeError.release() );
            }
        }

        //
        // WRITE CONCERN ERROR HANDLING
        //

        // The last write is weird, since we enforce write concern and check the error through
        // the same GLE if possible.  If the last GLE was an error, the write concern may not
        // have been enforced in that same GLE, so we need to send another after resetting the
        // error.

        BSONObj writeConcern;
        if ( request.isWriteConcernSet() ) {
            writeConcern = request.getWriteConcern();
            // Pre-2.4.2 mongods react badly to 'w' being set on config servers
            if ( nss.db() == "config" )
                writeConcern = fixWCForConfig( writeConcern );
        }

        bool needToEnforceWC = WriteConcernOptions::Acknowledged.woCompare(writeConcern) != 0 &&
                WriteConcernOptions::Unacknowledged.woCompare(writeConcern) != 0;
//.........这里部分代码省略.........