mirror of https://github.com/facebook/rocksdb.git
56 lines
1.8 KiB
C++
56 lines
1.8 KiB
C++
// 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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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#pragma once
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#include "rocksdb/stats_history.h"
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namespace rocksdb {
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class InMemoryStatsHistoryIterator final : public StatsHistoryIterator {
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public:
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InMemoryStatsHistoryIterator(uint64_t start_time, uint64_t end_time,
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DBImpl* db_impl)
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: start_time_(start_time),
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end_time_(end_time),
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valid_(true),
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db_impl_(db_impl) {
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AdvanceIteratorByTime(start_time_, end_time_);
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}
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~InMemoryStatsHistoryIterator() override;
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bool Valid() const override;
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Status status() const override;
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void Next() override;
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uint64_t GetStatsTime() const override;
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const std::map<std::string, uint64_t>& GetStatsMap() const override;
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private:
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// advance the iterator to the next stats history record with timestamp
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// between [start_time, end_time)
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void AdvanceIteratorByTime(uint64_t start_time, uint64_t end_time);
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// No copying allowed
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InMemoryStatsHistoryIterator(const InMemoryStatsHistoryIterator&) = delete;
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void operator=(const InMemoryStatsHistoryIterator&) = delete;
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InMemoryStatsHistoryIterator(InMemoryStatsHistoryIterator&&) = delete;
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InMemoryStatsHistoryIterator& operator=(InMemoryStatsHistoryIterator&&) =
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delete;
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uint64_t time_;
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uint64_t start_time_;
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uint64_t end_time_;
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std::map<std::string, uint64_t> stats_map_;
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Status status_;
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bool valid_;
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DBImpl* db_impl_;
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};
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} // namespace rocksdb
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