fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
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49 lines
1.6 KiB
49 lines
1.6 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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// 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 <map>
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#include <string>
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// #include "db/db_impl.h"
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#include "rocksdb/statistics.h"
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#include "rocksdb/status.h"
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namespace rocksdb {
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class DBImpl;
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class StatsHistoryIterator {
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public:
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StatsHistoryIterator() {}
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virtual ~StatsHistoryIterator() {}
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virtual bool Valid() const = 0;
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// Moves to the next stats history record. After this call, Valid() is
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// true iff the iterator was not positioned at the last entry in the source.
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// REQUIRES: Valid()
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virtual void Next() = 0;
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// Return the time stamp (in microseconds) when stats history is recorded.
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// REQUIRES: Valid()
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virtual uint64_t GetStatsTime() const = 0;
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// Return the current stats history as an std::map which specifies the
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// mapping from stats name to stats value . The underlying storage
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// for the returned map is valid only until the next modification of
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// the iterator.
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// REQUIRES: Valid()
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virtual const std::map<std::string, uint64_t>& GetStatsMap() const = 0;
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// If an error has occurred, return it. Else return an ok status.
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virtual Status status() const = 0;
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};
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} // namespace rocksdb
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