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#include "file_reader.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/wait_proxy.h>
#include <yt/cpp/mapreduce/interface/config.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/http/helpers.h>
#include <yt/cpp/mapreduce/http/http.h>
#include <yt/cpp/mapreduce/http/http_client.h>
#include <yt/cpp/mapreduce/http/retry_request.h>
#include <yt/cpp/mapreduce/raw_client/raw_requests.h>
namespace NYT {
namespace NDetail {
using ::ToString;
////////////////////////////////////////////////////////////////////////////////
static TMaybe<ui64> GetEndOffset(const TFileReaderOptions& options) {
if (options.Length_) {
return options.Offset_.GetOrElse(0) + *options.Length_;
} else {
return Nothing();
}
}
////////////////////////////////////////////////////////////////////////////////
TStreamReaderBase::TStreamReaderBase(
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId)
: Context_(context)
, ClientRetryPolicy_(std::move(clientRetryPolicy))
, ReadTransaction_(MakeHolder<TPingableTransaction>(
ClientRetryPolicy_,
context,
transactionId,
transactionPinger->GetChildTxPinger(),
TStartTransactionOptions()))
{ }
TStreamReaderBase::~TStreamReaderBase() = default;
TYPath TStreamReaderBase::Snapshot(const TYPath& path)
{
return NYT::Snapshot(ClientRetryPolicy_, Context_, ReadTransaction_->GetId(), path);
}
TString TStreamReaderBase::GetActiveRequestId() const
{
if (Response_) {
return Response_->GetRequestId();;
} else {
return "<no-active-request>";
}
}
size_t TStreamReaderBase::DoRead(void* buf, size_t len)
{
const int retryCount = Context_.Config->ReadRetryCount;
for (int attempt = 1; attempt <= retryCount; ++attempt) {
try {
if (!Input_) {
Response_ = Request(Context_, ReadTransaction_->GetId(), CurrentOffset_);
Input_ = Response_->GetResponseStream();
}
if (len == 0) {
return 0;
}
const size_t read = Input_->Read(buf, len);
CurrentOffset_ += read;
return read;
} catch (TErrorResponse& e) {
YT_LOG_ERROR("RSP %v - failed: %v (attempt %v of %v)",
GetActiveRequestId(),
e.what(),
attempt,
retryCount);
if (!IsRetriable(e) || attempt == retryCount) {
throw;
}
NDetail::TWaitProxy::Get()->Sleep(GetBackoffDuration(e, Context_.Config));
} catch (std::exception& e) {
YT_LOG_ERROR("RSP %v - failed: %v (attempt %v of %v)",
GetActiveRequestId(),
e.what(),
attempt,
retryCount);
// Invalidate connection.
Response_.reset();
if (attempt == retryCount) {
throw;
}
NDetail::TWaitProxy::Get()->Sleep(GetBackoffDuration(e, Context_.Config));
}
Input_ = nullptr;
}
Y_UNREACHABLE(); // we should either return or throw from loop above
}
////////////////////////////////////////////////////////////////////////////////
TFileReader::TFileReader(
const TRichYPath& path,
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId,
const TFileReaderOptions& options)
: TStreamReaderBase(std::move(clientRetryPolicy), std::move(transactionPinger), context, transactionId)
, FileReaderOptions_(options)
, Path_(path)
, StartOffset_(FileReaderOptions_.Offset_.GetOrElse(0))
, EndOffset_(GetEndOffset(FileReaderOptions_))
{
Path_.Path_ = TStreamReaderBase::Snapshot(Path_.Path_);
}
NHttpClient::IHttpResponsePtr TFileReader::Request(const TClientContext& context, const TTransactionId& transactionId, ui64 readBytes)
{
const ui64 currentOffset = StartOffset_ + readBytes;
TString hostName = GetProxyForHeavyRequest(context);
THttpHeader header("GET", GetReadFileCommand(context.Config->ApiVersion));
if (context.ServiceTicketAuth) {
header.SetServiceTicket(context.ServiceTicketAuth->Ptr->IssueServiceTicket());
} else {
header.SetToken(context.Token);
}
if (context.ImpersonationUser) {
header.SetImpersonationUser(*context.ImpersonationUser);
}
UpdateHeaderForProxyIfNeed(hostName, context, header);
header.AddTransactionId(transactionId);
header.SetOutputFormat(TMaybe<TFormat>()); // Binary format
if (EndOffset_) {
Y_ABORT_UNLESS(*EndOffset_ >= currentOffset);
FileReaderOptions_.Length(*EndOffset_ - currentOffset);
}
FileReaderOptions_.Offset(currentOffset);
header.MergeParameters(FormIORequestParameters(Path_, FileReaderOptions_));
header.SetResponseCompression(ToString(context.Config->AcceptEncoding));
auto requestId = CreateGuidAsString();
NHttpClient::IHttpResponsePtr response;
try {
response = context.HttpClient->Request(GetFullUrl(hostName, context, header), requestId, header);
} catch (const std::exception& ex) {
LogRequestError(requestId, header, ex.what(), "");
throw;
}
YT_LOG_DEBUG("RSP %v - file stream",
requestId);
return response;
}
////////////////////////////////////////////////////////////////////////////////
TBlobTableReader::TBlobTableReader(
const TYPath& path,
const TKey& key,
IClientRetryPolicyPtr retryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId,
const TBlobTableReaderOptions& options)
: TStreamReaderBase(std::move(retryPolicy), std::move(transactionPinger), context, transactionId)
, Key_(key)
, Options_(options)
{
Path_ = TStreamReaderBase::Snapshot(path);
}
NHttpClient::IHttpResponsePtr TBlobTableReader::Request(const TClientContext& context, const TTransactionId& transactionId, ui64 readBytes)
{
TString hostName = GetProxyForHeavyRequest(context);
THttpHeader header("GET", "read_blob_table");
if (context.ServiceTicketAuth) {
header.SetServiceTicket(context.ServiceTicketAuth->Ptr->IssueServiceTicket());
} else {
header.SetToken(context.Token);
}
if (context.ImpersonationUser) {
header.SetImpersonationUser(*context.ImpersonationUser);
}
UpdateHeaderForProxyIfNeed(hostName, context, header);
header.AddTransactionId(transactionId);
header.SetOutputFormat(TMaybe<TFormat>()); // Binary format
const ui64 currentOffset = Options_.Offset_ + readBytes;
const i64 startPartIndex = currentOffset / Options_.PartSize_;
const ui64 skipBytes = currentOffset - Options_.PartSize_ * startPartIndex;
auto lowerLimitKey = Key_;
lowerLimitKey.Parts_.push_back(startPartIndex);
auto upperLimitKey = Key_;
upperLimitKey.Parts_.push_back(std::numeric_limits<i64>::max());
TNode params = PathToParamNode(TRichYPath(Path_).AddRange(TReadRange()
.LowerLimit(TReadLimit().Key(lowerLimitKey))
.UpperLimit(TReadLimit().Key(upperLimitKey))));
params["start_part_index"] = TNode(startPartIndex);
params["offset"] = skipBytes;
if (Options_.PartIndexColumnName_) {
params["part_index_column_name"] = *Options_.PartIndexColumnName_;
}
if (Options_.DataColumnName_) {
params["data_column_name"] = *Options_.DataColumnName_;
}
params["part_size"] = Options_.PartSize_;
header.MergeParameters(params);
header.SetResponseCompression(ToString(context.Config->AcceptEncoding));
auto requestId = CreateGuidAsString();
NHttpClient::IHttpResponsePtr response;
try {
response = context.HttpClient->Request(GetFullUrl(hostName, context, header), requestId, header);
} catch (const std::exception& ex) {
LogRequestError(requestId, header, ex.what(), "");
throw;
}
YT_LOG_DEBUG("RSP %v - blob table stream",
requestId);
return response;
}
////////////////////////////////////////////////////////////////////////////////
} // namespace NDetail
} // namespace NYT
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