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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<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 << " : "
+ << path << swHistogram.getStatus().reason());
+ }
+ return nullptr;
+ }
+ const auto histogram = std::move(swHistogram.getValue());
+ addHistogram(path, histogram);
+ return histogram.get();
+ }
+}
+
+} // namespace mongo::stats