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diff --git a/src/mongo/db/query/stats/stats_cache.cpp b/src/mongo/db/query/stats/stats_cache.cpp
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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/stats_cache.h"
+
+#include "mongo/db/query/stats/collection_statistics.h"
+#include "mongo/util/read_through_cache.h"
+
+#include "mongo/logv2/log.h"
+
+#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kQuery
+
+namespace mongo::stats {
+namespace {
+const auto statsCacheDecoration = ServiceContext::declareDecoration<std::unique_ptr<StatsCache>>();
+} // namespace
+
+StatsCache::StatsCache(ServiceContext* service,
+ std::unique_ptr<StatsCacheLoader> cacheLoader,
+ ThreadPoolInterface& threadPool,
+ int size)
+ : ReadThroughCache(
+ _mutex,
+ service,
+ threadPool,
+ [this](OperationContext* opCtx,
+ const StatsPathString& statsPath,
+ const ValueHandle& stats) { return _lookupStats(opCtx, statsPath, stats); },
+ size),
+ _statsCacheLoader(std::move(cacheLoader)) {}
+
+StatsCache::LookupResult StatsCache::_lookupStats(OperationContext* opCtx,
+ const StatsPathString& statsPath,
+ const StatsCacheValueHandle& stats) {
+
+ try {
+ invariant(_statsCacheLoader);
+ auto newStats = _statsCacheLoader->getStats(opCtx, statsPath).get();
+ return LookupResult(std::move(newStats));
+ } catch (const DBException& ex) {
+ if (ex.code() == ErrorCodes::NamespaceNotFound) {
+ return StatsCache::LookupResult(boost::none);
+ }
+ throw;
+ }
+}
+
+} // namespace mongo::stats