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// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
#pragma once
#ifndef ROCKSDB_LITE
#include <atomic>
#include <functional>
#include <memory>
#include <mutex>
#include <unordered_map>
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/status.h"
#include "rocksdb/trace_reader_writer.h"
#include "rocksdb/trace_record.h"
#include "rocksdb/trace_record_result.h"
#include "rocksdb/utilities/replayer.h"
#include "trace_replay/trace_replay.h"
namespace ROCKSDB_NAMESPACE {
class ReplayerImpl : public Replayer {
public:
ReplayerImpl(DB* db, const std::vector<ColumnFamilyHandle*>& handles,
std::unique_ptr<TraceReader>&& reader);
~ReplayerImpl() override;
using Replayer::Prepare;
Status Prepare() override;
using Replayer::Next;
Status Next(std::unique_ptr<TraceRecord>* record) override;
using Replayer::Execute;
Status Execute(const std::unique_ptr<TraceRecord>& record,
std::unique_ptr<TraceRecordResult>* result) override;
using Replayer::Replay;
Status Replay(
const ReplayOptions& options,
const std::function<void(Status, std::unique_ptr<TraceRecordResult>&&)>&
result_callback) override;
using Replayer::GetHeaderTimestamp;
uint64_t GetHeaderTimestamp() const override;
private:
Status ReadHeader(Trace* header);
Status ReadTrace(Trace* trace);
// Generic function to execute a Trace in a thread pool.
static void BackgroundWork(void* arg);
std::unique_ptr<TraceReader> trace_reader_;
std::mutex mutex_;
std::atomic<bool> prepared_;
std::atomic<bool> trace_end_;
uint64_t header_ts_;
std::unique_ptr<TraceRecord::Handler> exec_handler_;
Env* env_;
// When reading the trace header, the trace file version can be parsed.
// Replayer will use different decode method to get the trace content based
// on different trace file version.
int trace_file_version_;
};
// Arguments passed to BackgroundWork() for replaying in a thread pool.
struct ReplayerWorkerArg {
Trace trace_entry;
int trace_file_version;
// Handler to execute TraceRecord.
TraceRecord::Handler* handler;
// Callback function to report the error status and the timestamp of the
// TraceRecord (not the start/end timestamp of executing the TraceRecord).
std::function<void(Status, uint64_t)> error_cb;
// Callback function to report the trace execution status and operation
// execution status/result(s).
std::function<void(Status, std::unique_ptr<TraceRecordResult>&&)> result_cb;
};
} // namespace ROCKSDB_NAMESPACE
#endif // ROCKSDB_LITE
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