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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/s/sharding_data_transform_metrics_observer.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/functional.h"
#include <set>
namespace mongo {
class ShardingDataTransformCumulativeMetrics {
public:
using InstanceObserver = ShardingDataTransformMetricsObserverInterface;
using DeregistrationFunction = unique_function<void()>;
[[nodiscard]] DeregistrationFunction registerInstanceMetrics(const InstanceObserver* metrics);
int64_t getOldestOperationRemainingTimeMillis() const;
size_t getObservedMetricsCount() const;
private:
struct MetricsComparer {
inline bool operator()(const InstanceObserver* a, const InstanceObserver* b) const {
auto aTime = a->getStartTimestamp();
auto bTime = b->getStartTimestamp();
if (aTime == bTime) {
return a->getUuid() < b->getUuid();
}
return aTime < bTime;
}
};
using MetricsSet = std::set<const InstanceObserver*, MetricsComparer>;
MetricsSet::iterator insertMetrics(const InstanceObserver* metrics);
mutable Mutex _mutex;
MetricsSet _instanceMetrics;
};
} // namespace mongo
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