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