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/**
* Copyright (C) 2021-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <boost/optional.hpp>
#include "mongo/db/catalog/collection.h"
namespace mongo {
/**
* Timeseries statistics at Collection-level. Decorates 'SharedCollectionDecorations' and is not
* versioned per Collection instance.
*
* Used for timeseries statistics the BucketCatalog is unable to keep track of.
*/
class TimeseriesStats {
public:
static const TimeseriesStats& get(const Collection* coll);
struct CompressedBucketInfo {
Status result = Status::OK();
int size = 0;
int numInterleaveRestarts = 0;
bool decompressionFailed = false;
};
/**
* Records stats for a closed time-series bucket. 'boost::none' for compressed means
* compression failed for any reason.
*/
void onBucketClosed(int uncompressedSize, const CompressedBucketInfo& compressed) const;
/**
* Appends current stats to the given BSONObjBuilder.
*/
void append(BSONObjBuilder* builder) const;
private:
// We need to be able to record stats on a time-series bucket collection without requiring a
// non-const Collection (which requires MODE_X collection lock).
mutable AtomicWord<long long> _uncompressedSize;
mutable AtomicWord<long long> _compressedSize;
mutable AtomicWord<long long> _compressedSubObjRestart;
mutable AtomicWord<long long> _numCompressedBuckets;
mutable AtomicWord<long long> _numUncompressedBuckets;
mutable AtomicWord<long long> _numFailedDecompressBuckets;
};
} // namespace mongo
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