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#pragma once
#include "transaction.h"
#include "transaction_pinger.h"
#include <yt/cpp/mapreduce/common/retry_lib.h>
#include <yt/cpp/mapreduce/http/http.h>
#include <yt/cpp/mapreduce/interface/common.h>
#include <yt/cpp/mapreduce/interface/io.h>
#include <yt/cpp/mapreduce/io/helpers.h>
#include <yt/cpp/mapreduce/raw_client/raw_requests.h>
#include <library/cpp/threading/blocking_queue/blocking_queue.h>
#include <util/stream/output.h>
#include <util/generic/buffer.h>
#include <util/stream/buffer.h>
#include <util/system/thread.h>
#include <util/system/event.h>
namespace NYT {
////////////////////////////////////////////////////////////////////////////////
class TRetryfulWriter
: public TRawTableWriter
{
public:
template <class TWriterOptions>
TRetryfulWriter(
IClientRetryPolicyPtr clientRetryPolicy,
ITransactionPingerPtr transactionPinger,
const TClientContext& context,
const TTransactionId& parentId,
const TString& command,
const TMaybe<TFormat>& format,
const TRichYPath& path,
const TWriterOptions& options)
: ClientRetryPolicy_(std::move(clientRetryPolicy))
, TransactionPinger_(std::move(transactionPinger))
, Context_(context)
, AutoFinish_(options.AutoFinish_)
, Command_(command)
, Format_(format)
, BufferSize_(GetBufferSize(options.WriterOptions_))
, ParentTransactionId_(parentId)
, WriteTransaction_()
, FilledBuffers_(2)
, EmptyBuffers_(2)
, Buffer_(BufferSize_ * 2)
, Thread_(TThread::TParams{SendThread, this}.SetName("retryful_writer"))
{
Parameters_ = FormIORequestParameters(path, options);
auto secondaryPath = path;
secondaryPath.Append_ = true;
secondaryPath.Schema_.Clear();
secondaryPath.CompressionCodec_.Clear();
secondaryPath.ErasureCodec_.Clear();
secondaryPath.OptimizeFor_.Clear();
SecondaryParameters_ = FormIORequestParameters(secondaryPath, options);
if (options.CreateTransaction_) {
WriteTransaction_.ConstructInPlace(ClientRetryPolicy_, context, parentId, TransactionPinger_->GetChildTxPinger(), TStartTransactionOptions());
auto append = path.Append_.GetOrElse(false);
auto lockMode = (append ? LM_SHARED : LM_EXCLUSIVE);
NDetail::NRawClient::Lock(ClientRetryPolicy_->CreatePolicyForGenericRequest(), Context_, WriteTransaction_->GetId(), path.Path_, lockMode);
}
EmptyBuffers_.Push(TBuffer(BufferSize_ * 2));
}
~TRetryfulWriter() override;
void NotifyRowEnd() override;
void Abort() override;
size_t GetBufferMemoryUsage() const override;
size_t GetRetryBlockRemainingSize() const
{
return (BufferSize_ > Buffer_.size()) ? (BufferSize_ - Buffer_.size()) : 0;
}
protected:
void DoWrite(const void* buf, size_t len) override;
void DoFinish() override;
private:
static size_t GetBufferSize(const TMaybe<TWriterOptions>& writerOptions);
private:
const IClientRetryPolicyPtr ClientRetryPolicy_;
const ITransactionPingerPtr TransactionPinger_;
const TClientContext Context_;
const bool AutoFinish_;
TString Command_;
TMaybe<TFormat> Format_;
const size_t BufferSize_;
TNode Parameters_;
TNode SecondaryParameters_;
TTransactionId ParentTransactionId_;
TMaybe<TPingableTransaction> WriteTransaction_;
::NThreading::TBlockingQueue<TBuffer> FilledBuffers_;
::NThreading::TBlockingQueue<TBuffer> EmptyBuffers_;
TBuffer Buffer_;
TThread Thread_;
bool Started_ = false;
std::exception_ptr Exception_ = nullptr;
enum EWriterState {
Ok,
Completed,
Error,
} WriterState_ = Ok;
private:
void FlushBuffer(bool lastBlock);
void Send(const TBuffer& buffer);
void CheckWriterState();
void SendThread();
static void* SendThread(void* opaque);
};
////////////////////////////////////////////////////////////////////////////////
}
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