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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.
*/
#pragma once
#include "mongo/bson/bsonobjbuilder.h"
#include "mongo/db/s/sharding_data_transform_cumulative_metrics_field_name_provider.h"
#include "mongo/db/s/sharding_data_transform_metrics_observer_interface.h"
#include "mongo/db/service_context.h"
#include "mongo/platform/atomic_word.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/duration.h"
#include "mongo/util/functional.h"
#include <set>
namespace mongo {
class ShardingDataTransformCumulativeMetrics {
public:
using NameProvider = ShardingDataTransformCumulativeMetricsFieldNameProvider;
using Role = ShardingDataTransformMetrics::Role;
using InstanceObserver = ShardingDataTransformMetricsObserverInterface;
using DeregistrationFunction = unique_function<void()>;
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>;
/**
* RAII type that takes care of deregistering the observer once it goes out of scope.
*/
class ScopedObserver {
public:
ScopedObserver(ShardingDataTransformCumulativeMetrics* metrics,
Role role,
MetricsSet::iterator observerIterator);
ScopedObserver(const ScopedObserver&) = delete;
ScopedObserver& operator=(const ScopedObserver&) = delete;
~ScopedObserver();
private:
ShardingDataTransformCumulativeMetrics* const _metrics;
const Role _role;
const MetricsSet::iterator _observerIterator;
};
using UniqueScopedObserver = std::unique_ptr<ScopedObserver>;
friend ScopedObserver;
static ShardingDataTransformCumulativeMetrics* getForResharding(ServiceContext* context);
static ShardingDataTransformCumulativeMetrics* getForGlobalIndexes(ServiceContext* context);
ShardingDataTransformCumulativeMetrics(const std::string& rootSectionName,
std::unique_ptr<NameProvider> fieldNameProvider);
virtual ~ShardingDataTransformCumulativeMetrics() = default;
[[nodiscard]] UniqueScopedObserver registerInstanceMetrics(const InstanceObserver* metrics);
int64_t getOldestOperationHighEstimateRemainingTimeMillis(Role role) const;
int64_t getOldestOperationLowEstimateRemainingTimeMillis(Role role) const;
size_t getObservedMetricsCount() const;
size_t getObservedMetricsCount(Role role) const;
void reportForServerStatus(BSONObjBuilder* bob) const;
void onStarted();
void onSuccess();
void onFailure();
void onCanceled();
void setLastOpEndingChunkImbalance(int64_t imbalanceCount);
void onReadDuringCriticalSection();
void onWriteDuringCriticalSection();
void onWriteToStashedCollections();
void onCloningTotalRemoteBatchRetrieval(Milliseconds elapsed);
void onInsertsDuringCloning(int64_t count, int64_t bytes, const Milliseconds& elapsedTime);
protected:
const ShardingDataTransformCumulativeMetricsFieldNameProvider* getFieldNames() const;
virtual void reportActive(BSONObjBuilder* bob) const;
virtual void reportOldestActive(BSONObjBuilder* bob) const;
virtual void reportLatencies(BSONObjBuilder* bob) const;
virtual void reportCurrentInSteps(BSONObjBuilder* bob) const;
private:
MetricsSet& getMetricsSetForRole(Role role);
const MetricsSet& getMetricsSetForRole(Role role) const;
const InstanceObserver* getOldestOperation(WithLock, Role role) const;
MetricsSet::iterator insertMetrics(const InstanceObserver* metrics, MetricsSet& set);
void deregisterMetrics(const Role& role, const MetricsSet::iterator& metrics);
mutable Mutex _mutex;
const std::string _rootSectionName;
std::unique_ptr<NameProvider> _fieldNames;
std::vector<MetricsSet> _instanceMetricsForAllRoles;
AtomicWord<bool> _operationWasAttempted;
AtomicWord<int64_t> _countStarted{0};
AtomicWord<int64_t> _countSucceeded{0};
AtomicWord<int64_t> _countFailed{0};
AtomicWord<int64_t> _countCancelled{0};
AtomicWord<int64_t> _totalBatchRetrievedDuringClone{0};
AtomicWord<int64_t> _totalBatchRetrievedDuringCloneMillis{0};
AtomicWord<int64_t> _documentsProcessed{0};
AtomicWord<int64_t> _bytesWritten{0};
AtomicWord<int64_t> _lastOpEndingChunkImbalance{0};
AtomicWord<int64_t> _readsDuringCriticalSection{0};
AtomicWord<int64_t> _writesDuringCriticalSection{0};
AtomicWord<int64_t> _collectionCloningTotalLocalBatchInserts{0};
AtomicWord<int64_t> _collectionCloningTotalLocalInsertTimeMillis{0};
AtomicWord<int64_t> _writesToStashedCollections{0};
};
} // namespace mongo
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