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/**
* Copyright (C) 2022-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.
*/
#include "mongo/db/query/stats/collection_statistics_impl.h"
#include "mongo/db/client.h"
#include "mongo/db/query/stats/stats_catalog.h"
namespace mongo::stats {
CollectionStatisticsImpl::CollectionStatisticsImpl(double cardinality, const NamespaceString& nss)
: _cardinality{cardinality}, _histograms{}, _nss{nss} {};
double CollectionStatisticsImpl::getCardinality() const {
return _cardinality;
}
void CollectionStatisticsImpl::addHistogram(const std::string& path,
std::shared_ptr<const ArrayHistogram> histogram) const {
_histograms[path] = histogram;
}
const ArrayHistogram* CollectionStatisticsImpl::getHistogram(const std::string& path) const {
if (auto mapIt = _histograms.find(path); mapIt != _histograms.end()) {
return mapIt->second.get();
} else {
uassert(8423368, "no current client", Client::getCurrent());
auto opCtx = Client::getCurrent()->getOperationContext();
uassert(8423367, "no operation context", opCtx);
StatsCatalog& statsCatalog = StatsCatalog::get(opCtx);
const auto swHistogram = statsCatalog.getHistogram(opCtx, _nss, path);
if (!swHistogram.isOK()) {
if (swHistogram != ErrorCodes::NamespaceNotFound) {
uasserted(swHistogram.getStatus().code(),
str::stream()
<< "Error getting histograms for path " << _nss.toStringForErrorMsg()
<< " : " << path << swHistogram.getStatus().reason());
}
return nullptr;
}
const auto histogram = std::move(swHistogram.getValue());
addHistogram(path, histogram);
return histogram.get();
}
}
} // namespace mongo::stats
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