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#pragma once
#include <yt/cpp/mapreduce/common/fwd.h>
#include <yt/cpp/mapreduce/interface/io.h>
#include <yt/cpp/mapreduce/http/context.h>
#include <yt/cpp/mapreduce/http/requests.h>
class IInputStream;
namespace NYT {
class THttpRequest;
class TPingableTransaction;
namespace NDetail {
////////////////////////////////////////////////////////////////////////////////
class TStreamReaderBase
: public IFileReader
{
public:
TStreamReaderBase(
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId);
~TStreamReaderBase();
protected:
TYPath Snapshot(const TYPath& path);
protected:
const TClientContext Context_;
private:
size_t DoRead(void* buf, size_t len) override;
virtual NHttpClient::IHttpResponsePtr Request(const TClientContext& context, const TTransactionId& transactionId, ui64 readBytes) = 0;
TString GetActiveRequestId() const;
private:
const IClientRetryPolicyPtr ClientRetryPolicy_;
TFileReaderOptions FileReaderOptions_;
NHttpClient::IHttpResponsePtr Response_;
IInputStream* Input_ = nullptr;
THolder<TPingableTransaction> ReadTransaction_;
ui64 CurrentOffset_ = 0;
};
////////////////////////////////////////////////////////////////////////////////
class TFileReader
: public TStreamReaderBase
{
public:
TFileReader(
const TRichYPath& path,
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId,
const TFileReaderOptions& options = TFileReaderOptions());
private:
NHttpClient::IHttpResponsePtr Request(const TClientContext& context, const TTransactionId& transactionId, ui64 readBytes) override;
private:
TFileReaderOptions FileReaderOptions_;
TRichYPath Path_;
const ui64 StartOffset_;
const TMaybe<ui64> EndOffset_;
};
////////////////////////////////////////////////////////////////////////////////
class TBlobTableReader
: public TStreamReaderBase
{
public:
TBlobTableReader(
const TYPath& path,
const TKey& key,
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& transactionId,
const TBlobTableReaderOptions& options);
private:
NHttpClient::IHttpResponsePtr Request(const TClientContext& context, const TTransactionId& transactionId, ui64 readBytes) override;
private:
const TKey Key_;
const TBlobTableReaderOptions Options_;
TYPath Path_;
};
} // namespace NDetail
} // namespace NYT
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