bool batchErrorToLastError(const BatchedCommandRequest& request,
const BatchedCommandResponse& response,
LastError* error) {
unique_ptr<WriteErrorDetail> commandError;
WriteErrorDetail* lastBatchError = NULL;
if (!response.getOk()) {
// Command-level error, all writes failed
commandError.reset(new WriteErrorDetail);
buildErrorFromResponse(response, commandError.get());
lastBatchError = commandError.get();
} else if (response.isErrDetailsSet()) {
// The last error in the batch is always reported - this matches expected COE
// semantics for insert batches. For updates and deletes, error is only reported
// if the error was on the last item.
const bool lastOpErrored = response.getErrDetails().back()->getIndex() ==
static_cast<int>(request.sizeWriteOps() - 1);
if (request.getBatchType() == BatchedCommandRequest::BatchType_Insert || lastOpErrored) {
lastBatchError = response.getErrDetails().back();
}
} else {
// We don't care about write concern errors, these happen in legacy mode in GLE.
}
// Record an error if one exists
if (lastBatchError) {
string errMsg = lastBatchError->getErrMessage();
error->setLastError(lastBatchError->getErrCode(),
errMsg.empty() ? "see code for details" : errMsg.c_str());
return true;
}
// Record write stats otherwise
// NOTE: For multi-write batches, our semantics change a little because we don't have
// un-aggregated "n" stats.
if (request.getBatchType() == BatchedCommandRequest::BatchType_Update) {
BSONObj upsertedId;
if (response.isUpsertDetailsSet()) {
// Only report the very last item's upserted id if applicable
if (response.getUpsertDetails().back()->getIndex() + 1 ==
static_cast<int>(request.sizeWriteOps())) {
upsertedId = response.getUpsertDetails().back()->getUpsertedID();
}
}
int numUpserted = 0;
if (response.isUpsertDetailsSet())
numUpserted = response.sizeUpsertDetails();
int numMatched = response.getN() - numUpserted;
dassert(numMatched >= 0);
// Wrap upserted id in "upserted" field
BSONObj leUpsertedId;
if (!upsertedId.isEmpty())
leUpsertedId = upsertedId.firstElement().wrap(kUpsertedFieldName);
error->recordUpdate(numMatched > 0, response.getN(), leUpsertedId);
} else if (request.getBatchType() == BatchedCommandRequest::BatchType_Delete) {
error->recordDelete(response.getN());
}
return false;
}
