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#include "skiff_row_table_reader.h"
#include <yt/cpp/mapreduce/interface/logging/yt_log.h>
#include <yt/cpp/mapreduce/interface/skiff_row.h>
#include <library/cpp/skiff/skiff.h>
#include <library/cpp/yt/logging/logger.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
TSkiffRowTableReader::TSkiffRowTableReader(
::TIntrusivePtr<TRawTableReader> input,
const NSkiff::TSkiffSchemaPtr& schema,
TVector<ISkiffRowSkipperPtr>&& skippers,
NDetail::TCreateSkiffSchemaOptions&& options)
: Input_(std::move(input))
, BufferedInput_(&Input_)
, Parser_({schema, &BufferedInput_})
, Skippers_(std::move(skippers))
, Options_(std::move(options))
{
Next();
}
TSkiffRowTableReader::~TSkiffRowTableReader()
{ }
bool TSkiffRowTableReader::Retry()
{
if (PrepareRetry()) {
RowTaken_ = true;
Next();
return true;
}
return false;
}
bool TSkiffRowTableReader::PrepareRetry()
{
if (Input_.Retry(RangeIndex_, RowIndex_)) {
RowIndex_.Clear();
RangeIndex_.Clear();
BufferedInput_ = TBufferedInput(&Input_);
Parser_.emplace(&BufferedInput_);
return true;
}
return false;
}
void TSkiffRowTableReader::ReadRow(const ISkiffRowParserPtr& parser)
{
while (true) {
try {
parser->Parse(&Parser_.value());
RowTaken_ = true;
// We successfully parsed one more row from the stream,
// so reset retry count to their initial value.
Input_.ResetRetries();
break;
} catch (const std::exception& ex) {
YT_LOG_ERROR("Read error during parsing: %v", ex.what());
if (!Retry()) {
throw;
}
}
}
}
bool TSkiffRowTableReader::IsValid() const
{
return Valid_;
}
void TSkiffRowTableReader::SkipRow()
{
CheckValidity();
while (true) {
try {
Skippers_[TableIndex_]->SkipRow(&Parser_.value());
break;
} catch (const std::exception& ex) {
YT_LOG_ERROR("Read error during skipping row: %v", ex.what());
if (!Retry()) {
throw;
}
}
}
}
void TSkiffRowTableReader::CheckValidity() const {
if (!IsValid()) {
ythrow yexception() << "Iterator is not valid";
}
}
void TSkiffRowTableReader::Next()
{
if (!RowTaken_) {
SkipRow();
}
CheckValidity();
if (Y_UNLIKELY(Finished_ || !Parser_->HasMoreData())) {
Finished_ = true;
Valid_ = false;
return;
}
if (AfterKeySwitch_) {
AfterKeySwitch_ = false;
return;
}
if (RowIndex_) {
++*RowIndex_;
}
while (true) {
try {
auto tag = Parser_->ParseVariant16Tag();
if (tag == NSkiff::EndOfSequenceTag<ui16>()) {
IsEndOfStream_ = true;
break;
} else {
TableIndex_ = tag;
}
if (TableIndex_ >= Skippers_.size()) {
ythrow TIOException() <<
"Table index " << TableIndex_ <<
" is out of range [0, " << Skippers_.size() <<
") in read";
}
if (Options_.HasKeySwitch_) {
auto keySwitch = Parser_->ParseBoolean();
if (keySwitch) {
AfterKeySwitch_ = true;
Valid_ = false;
}
}
auto tagRowIndex = Parser_->ParseVariant8Tag();
if (tagRowIndex == 1) {
RowIndex_ = Parser_->ParseInt64();
} else {
Y_ENSURE(tagRowIndex == 0, "Tag for row_index was expected to be 0 or 1, got " << tagRowIndex);
}
if (Options_.HasRangeIndex_) {
auto tagRangeIndex = Parser_->ParseVariant8Tag();
if (tagRangeIndex == 1) {
RangeIndex_ = Parser_->ParseInt64();
} else {
Y_ENSURE(tagRangeIndex == 0, "Tag for range_index was expected to be 0 or 1, got " << tagRangeIndex);
}
}
break;
} catch (const std::exception& ex) {
YT_LOG_ERROR("Read error: %v", ex.what());
if (!PrepareRetry()) {
throw;
}
}
}
RowTaken_ = false;
}
ui32 TSkiffRowTableReader::GetTableIndex() const
{
CheckValidity();
return TableIndex_;
}
ui32 TSkiffRowTableReader::GetRangeIndex() const
{
CheckValidity();
return RangeIndex_.GetOrElse(0);
}
ui64 TSkiffRowTableReader::GetRowIndex() const
{
CheckValidity();
return RowIndex_.GetOrElse(0ULL);
}
void TSkiffRowTableReader::NextKey() {
while (Valid_) {
Next();
}
if (Finished_) {
return;
}
Valid_ = true;
if (RowIndex_) {
--*RowIndex_;
}
RowTaken_ = true;
}
TMaybe<size_t> TSkiffRowTableReader::GetReadByteCount() const {
return Input_.GetReadByteCount();
}
bool TSkiffRowTableReader::IsEndOfStream() const {
return IsEndOfStream_;
}
bool TSkiffRowTableReader::IsRawReaderExhausted() const {
return Finished_;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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