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#include "client_reader.h"
#include "structured_table_formats.h"
#include "transaction.h"
#include "transaction_pinger.h"
#include <yt/cpp/mapreduce/common/helpers.h>
#include <yt/cpp/mapreduce/common/retry_lib.h>
#include <yt/cpp/mapreduce/common/retry_request.h>
#include <yt/cpp/mapreduce/common/trace_context.h>
#include <yt/cpp/mapreduce/common/wait_proxy.h>
#include <yt/cpp/mapreduce/interface/config.h>
#include <yt/cpp/mapreduce/interface/raw_client.h>
#include <yt/cpp/mapreduce/interface/tvm.h>
#include <yt/cpp/mapreduce/interface/logging/yt_log.h>
#include <yt/cpp/mapreduce/io/helpers.h>
#include <yt/cpp/mapreduce/io/yamr_table_reader.h>
#include <library/cpp/yson/node/serialize.h>
#include <util/random/random.h>
#include <util/stream/file.h>
#include <util/stream/str.h>
#include <util/string/builder.h>
#include <util/string/cast.h>
namespace NYT {
using ::ToString;
////////////////////////////////////////////////////////////////////////////////
TClientReader::TClientReader(
const TRichYPath& path,
const IRawClientPtr& rawClient,
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId,
const TFormat& format,
const TTableReaderOptions& options,
bool useFormatFromTableAttributes)
: Path_(path)
, RawClient_(rawClient)
, ClientRetryPolicy_(std::move(clientRetryPolicy))
, Context_(context)
, ParentTransactionId_(transactionId)
, Format_(format)
, Options_(options)
, ReadTransaction_(nullptr)
, TraceContext_(NTracing::CreateTraceContext("TClientReader", context.Config))
{
NTracing::TCurrentTraceContextGuard guard(TraceContext_->Ptr);
if (options.CreateTransaction_) {
Y_ABORT_UNLESS(transactionPinger, "Internal error: transactionPinger is null");
ReadTransaction_ = std::make_unique<TPingableTransaction>(
RawClient_,
ClientRetryPolicy_,
Context_,
transactionId,
transactionPinger->GetChildTxPinger(),
TStartTransactionOptions());
Path_.Path(Snapshot(
RawClient_,
ClientRetryPolicy_,
ReadTransaction_->GetId(),
path.Path_));
}
if (useFormatFromTableAttributes) {
auto transactionId2 = ReadTransaction_ ? ReadTransaction_->GetId() : ParentTransactionId_;
auto newFormat = GetTableFormat(ClientRetryPolicy_, RawClient_, Context_, transactionId2, Path_);
if (newFormat) {
Format_.Config = *newFormat;
}
}
TransformYPath();
}
bool TClientReader::Retry(
const TMaybe<ui32>& rangeIndex,
const TMaybe<ui64>& rowIndex,
const std::exception_ptr& error)
{
NTracing::TCurrentTraceContextGuard guard(TraceContext_->Ptr);
// We always stop retries if reader is aborted
if (IAbortableInputStream::IsAbortedError(error)) {
std::rethrow_exception(error);
}
if (CurrentRequestRetryPolicy_) {
TMaybe<TDuration> backoffDuration;
try {
std::rethrow_exception(error);
} catch (const TErrorResponse& ex) {
if (!IsRetriable(ex)) {
throw;
}
backoffDuration = CurrentRequestRetryPolicy_->OnRetriableError(ex);
} catch (const std::exception& ex) {
if (!IsRetriable(ex)) {
throw;
}
backoffDuration = CurrentRequestRetryPolicy_->OnGenericError(ex);
} catch (...) {
}
if (!backoffDuration) {
return false;
}
NDetail::TWaitProxy::Get()->Sleep(*backoffDuration);
}
try {
CreateRequest(rangeIndex, rowIndex);
return true;
} catch (const std::exception& ex) {
YT_LOG_ERROR("Client reader retry failed: %v",
ex.what());
return false;
}
}
void TClientReader::ResetRetries()
{
CurrentRequestRetryPolicy_ = nullptr;
}
void TClientReader::Abort()
{
auto g = Guard(Lock_);
AbortRequested_ = true;
if (Input_) {
Input_->Abort();
}
}
bool TClientReader::IsAborted() const
{
auto g = Guard(Lock_);
if (!Input_) {
return AbortRequested_;
}
return Input_->IsAborted();
}
size_t TClientReader::DoRead(void* buf, size_t len)
{
NTracing::TCurrentTraceContextGuard guard(TraceContext_->Ptr);
EnsureInitialized();
return Input_->Read(buf, len);
}
void TClientReader::TransformYPath()
{
for (auto& range : Path_.MutableRangesView()) {
auto& exact = range.Exact_;
if (IsTrivial(exact)) {
continue;
}
if (exact.RowIndex_) {
range.LowerLimit(TReadLimit().RowIndex(*exact.RowIndex_));
range.UpperLimit(TReadLimit().RowIndex(*exact.RowIndex_ + 1));
exact.RowIndex_.Clear();
} else if (exact.Key_) {
range.LowerLimit(TReadLimit().Key(*exact.Key_));
auto lastPart = TNode::CreateEntity();
lastPart.Attributes() = TNode()("type", "max");
exact.Key_->Parts_.push_back(lastPart);
range.UpperLimit(TReadLimit().Key(*exact.Key_));
exact.Key_.Clear();
}
}
}
void TClientReader::CreateRequest(const TMaybe<ui32>& rangeIndex, const TMaybe<ui64>& rowIndex)
{
NTracing::TCurrentTraceContextGuard guard(TraceContext_->Ptr);
if (!CurrentRequestRetryPolicy_) {
CurrentRequestRetryPolicy_ = ClientRetryPolicy_->CreatePolicyForGenericRequest();
}
auto transactionId = (ReadTransaction_ ? ReadTransaction_->GetId() : ParentTransactionId_);
if (rowIndex.Defined()) {
auto& ranges = Path_.MutableRanges();
if (ranges.Empty()) {
ranges.ConstructInPlace(TVector{TReadRange()});
} else {
if (rangeIndex.GetOrElse(0) >= ranges->size()) {
ythrow yexception()
<< "range index " << rangeIndex.GetOrElse(0)
<< " is out of range, input range count is " << ranges->size();
}
ranges->erase(ranges->begin(), ranges->begin() + rangeIndex.GetOrElse(0));
}
ranges->begin()->LowerLimit(TReadLimit().RowIndex(*rowIndex));
}
auto newInput = NDetail::RequestWithRetry<std::unique_ptr<IAbortableInputStream>>(
CurrentRequestRetryPolicy_,
[this, &transactionId] (TMutationId /*mutationId*/) {
return RawClient_->ReadTable(transactionId, Path_, Format_, Options_);
});
auto g = Guard(Lock_);
// NB: Abort could've been called while we are waiting for newInput
if (AbortRequested_) {
newInput->Abort();
}
Input_ = std::move(newInput);
}
void TClientReader::EnsureInitialized()
{
if (Input_) {
return;
}
{
auto g = Guard(Lock_);
if (AbortRequested_) {
ythrow TInputStreamAbortedError() << "Stream was aborted";
}
}
CreateRequest();
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NYT
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