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#include "lenval_table_reader.h"
#include <yt/cpp/mapreduce/common/helpers.h>
#include <yt/cpp/mapreduce/interface/logging/yt_log.h>
#include <util/string/printf.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
const i32 CONTROL_ATTR_TABLE_INDEX = -1;
const i32 CONTROL_ATTR_KEY_SWITCH = -2;
const i32 CONTROL_ATTR_RANGE_INDEX = -3;
const i32 CONTROL_ATTR_ROW_INDEX = -4;
const i32 CONTROL_ATTR_END_OF_STREAM = -5;
const i32 CONTROL_ATTR_TABLET_INDEX = -6;
////////////////////////////////////////////////////////////////////////////////
TLenvalTableReader::TLenvalTableReader(::TIntrusivePtr<TRawTableReader> input)
: Input_(std::move(input))
{
TLenvalTableReader::Next();
}
TLenvalTableReader::~TLenvalTableReader()
{ }
void TLenvalTableReader::CheckValidity() const
{
if (!IsValid()) {
ythrow yexception() << "Iterator is not valid";
}
}
bool TLenvalTableReader::IsValid() const
{
return Valid_;
}
void TLenvalTableReader::Next()
{
if (!RowTaken_) {
SkipRow();
}
CheckValidity();
if (RowIndex_) {
++*RowIndex_;
}
while (true) {
try {
i32 value = 0;
if (!ReadInteger(&value, true)) {
return;
}
while (value < 0 && !IsEndOfStream_) {
switch (value) {
case CONTROL_ATTR_KEY_SWITCH:
if (!AtStart_) {
Valid_ = false;
return;
} else {
ReadInteger(&value);
}
break;
case CONTROL_ATTR_TABLE_INDEX: {
ui32 tmp = 0;
ReadInteger(&tmp);
TableIndex_ = tmp;
ReadInteger(&value);
break;
}
case CONTROL_ATTR_ROW_INDEX: {
ui64 tmp = 0;
ReadInteger(&tmp);
RowIndex_ = tmp;
ReadInteger(&value);
break;
}
case CONTROL_ATTR_RANGE_INDEX: {
ui32 tmp = 0;
ReadInteger(&tmp);
RangeIndex_ = tmp;
ReadInteger(&value);
break;
}
case CONTROL_ATTR_TABLET_INDEX: {
ui64 tmp = 0;
ReadInteger(&tmp);
TabletIndex_ = tmp;
ReadInteger(&value);
break;
}
case CONTROL_ATTR_END_OF_STREAM: {
IsEndOfStream_ = true;
break;
}
default:
ythrow yexception() <<
Sprintf("Invalid control integer %d in lenval stream", value);
}
}
Length_ = static_cast<ui32>(value);
RowTaken_ = false;
AtStart_ = false;
} catch (const std::exception& ex) {
if (!PrepareRetry(std::make_exception_ptr(ex))) {
throw;
}
continue;
}
break;
}
}
bool TLenvalTableReader::Retry(const std::exception_ptr& error)
{
if (PrepareRetry(error)) {
RowTaken_ = true;
Next();
return true;
}
return false;
}
void TLenvalTableReader::NextKey()
{
while (Valid_) {
Next();
}
if (Finished_) {
return;
}
Valid_ = true;
if (RowIndex_) {
--*RowIndex_;
}
RowTaken_ = true;
}
ui32 TLenvalTableReader::GetTableIndex() const
{
CheckValidity();
return TableIndex_;
}
ui32 TLenvalTableReader::GetRangeIndex() const
{
CheckValidity();
return RangeIndex_.GetOrElse(0) + RangeIndexShift_;
}
ui64 TLenvalTableReader::GetRowIndex() const
{
CheckValidity();
return RowIndex_.GetOrElse(0UL);
}
TMaybe<size_t> TLenvalTableReader::GetReadByteCount() const
{
return Input_.GetReadByteCount();
}
bool TLenvalTableReader::IsEndOfStream() const
{
return IsEndOfStream_;
}
bool TLenvalTableReader::IsRawReaderExhausted() const
{
return Finished_;
}
bool TLenvalTableReader::PrepareRetry(const std::exception_ptr& error)
{
if (Input_.Retry(RangeIndex_, RowIndex_, error)) {
if (RangeIndex_) {
RangeIndexShift_ += *RangeIndex_;
}
RowIndex_.Clear();
RangeIndex_.Clear();
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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