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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/bsonobj.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/s/metrics_state_holder.h"
#include "mongo/db/s/resharding/resharding_cumulative_metrics.h"
#include "mongo/db/s/resharding/resharding_metrics_field_name_provider.h"
#include "mongo/db/s/resharding/resharding_metrics_helpers.h"
#include "mongo/db/s/resharding/resharding_oplog_applier_progress_gen.h"
#include "mongo/db/s/sharding_data_transform_instance_metrics.h"
#include "mongo/util/uuid.h"
namespace mongo {
class ReshardingMetrics : public ShardingDataTransformInstanceMetrics {
public:
using State = stdx::variant<CoordinatorStateEnum, RecipientStateEnum, DonorStateEnum>;
class DonorState {
public:
using MetricsType = ReshardingCumulativeMetrics::DonorStateEnum;
explicit DonorState(DonorStateEnum enumVal);
MetricsType toMetrics() const;
DonorStateEnum getState() const;
private:
const DonorStateEnum _enumVal;
};
class RecipientState {
public:
using MetricsType = ReshardingCumulativeMetrics::RecipientStateEnum;
explicit RecipientState(RecipientStateEnum enumVal);
MetricsType toMetrics() const;
RecipientStateEnum getState() const;
private:
RecipientStateEnum _enumVal;
};
class CoordinatorState {
public:
using MetricsType = ReshardingCumulativeMetrics::CoordinatorStateEnum;
explicit CoordinatorState(CoordinatorStateEnum enumVal);
MetricsType toMetrics() const;
CoordinatorStateEnum getState() const;
private:
CoordinatorStateEnum _enumVal;
};
ReshardingMetrics(const CommonReshardingMetadata& metadata,
Role role,
ClockSource* clockSource,
ShardingDataTransformCumulativeMetrics* cumulativeMetrics);
ReshardingMetrics(const CommonReshardingMetadata& metadata,
Role role,
ClockSource* clockSource,
ShardingDataTransformCumulativeMetrics* cumulativeMetrics,
State state);
ReshardingMetrics(UUID instanceId,
BSONObj shardKey,
NamespaceString nss,
Role role,
Date_t startTime,
ClockSource* clockSource,
ShardingDataTransformCumulativeMetrics* cumulativeMetrics);
ReshardingMetrics(UUID instanceId,
BSONObj shardKey,
NamespaceString nss,
Role role,
Date_t startTime,
ClockSource* clockSource,
ShardingDataTransformCumulativeMetrics* cumulativeMetrics,
State state);
~ReshardingMetrics();
static std::unique_ptr<ReshardingMetrics> makeInstance(UUID instanceId,
BSONObj shardKey,
NamespaceString nss,
Role role,
Date_t startTime,
ServiceContext* serviceContext);
template <typename T>
static auto initializeFrom(const T& document,
ClockSource* clockSource,
ShardingDataTransformCumulativeMetrics* cumulativeMetrics) {
static_assert(resharding_metrics::isStateDocument<T>);
auto result =
std::make_unique<ReshardingMetrics>(document.getCommonReshardingMetadata(),
resharding_metrics::getRoleForStateDocument<T>(),
clockSource,
cumulativeMetrics,
resharding_metrics::getState(document));
result->restoreRoleSpecificFields(document);
return result;
}
template <typename T>
static auto initializeFrom(const T& document, ServiceContext* serviceContext) {
return initializeFrom(
document,
serviceContext->getFastClockSource(),
ShardingDataTransformCumulativeMetrics::getForResharding(serviceContext));
}
template <typename T>
void onStateTransition(T before, boost::none_t after) {
_stateHolder.onStateTransition(before, after);
}
template <typename T>
void onStateTransition(boost::none_t before, T after) {
_stateHolder.onStateTransition(before, after);
}
template <typename T>
void onStateTransition(T before, T after) {
_stateHolder.onStateTransition(before, after);
}
void accumulateFrom(const ReshardingOplogApplierProgress& progressDoc);
BSONObj reportForCurrentOp() const noexcept override;
void onUpdateApplied();
void onInsertApplied();
void onDeleteApplied();
void onOplogEntriesFetched(int64_t numEntries, Milliseconds elapsed);
void restoreOplogEntriesFetched(int64_t numEntries);
void onOplogEntriesApplied(int64_t numEntries);
void restoreOplogEntriesApplied(int64_t numEntries);
void onApplyingBegin();
void onApplyingEnd();
void onLocalInsertDuringOplogFetching(Milliseconds elapsed);
void onBatchRetrievedDuringOplogApplying(Milliseconds elapsed);
void onOplogLocalBatchApplied(Milliseconds elapsed);
Seconds getApplyingElapsedTimeSecs() const;
Date_t getApplyingBegin() const;
Date_t getApplyingEnd() const;
Milliseconds getRecipientHighEstimateRemainingTimeMillis() const;
protected:
virtual StringData getStateString() const noexcept override;
void restoreApplyingBegin(Date_t date);
void restoreApplyingEnd(Date_t date);
private:
std::string createOperationDescription() const noexcept override;
void restoreRecipientSpecificFields(const ReshardingRecipientDocument& document);
void restoreCoordinatorSpecificFields(const ReshardingCoordinatorDocument& document);
ReshardingCumulativeMetrics* getReshardingCumulativeMetrics();
template <typename T>
void restoreRoleSpecificFields(const T& document) {
if constexpr (std::is_same_v<T, ReshardingRecipientDocument>) {
restoreRecipientSpecificFields(document);
return;
}
if constexpr (std::is_same_v<T, ReshardingCoordinatorDocument>) {
restoreCoordinatorSpecificFields(document);
return;
}
}
template <typename T>
void restorePhaseDurationFields(const T& document) {
static_assert(resharding_metrics::isStateDocument<T>);
auto metrics = document.getMetrics();
if (!metrics) {
return;
}
auto copyDurations = metrics->getDocumentCopy();
if (copyDurations) {
auto copyingBegin = copyDurations->getStart();
if (copyingBegin) {
restoreCopyingBegin(*copyingBegin);
}
auto copyingEnd = copyDurations->getStop();
if (copyingEnd) {
restoreCopyingEnd(*copyingEnd);
}
}
auto applyDurations = metrics->getOplogApplication();
if (applyDurations) {
auto applyingBegin = applyDurations->getStart();
if (applyingBegin) {
restoreApplyingBegin(*applyingBegin);
}
auto applyingEnd = applyDurations->getStop();
if (applyingEnd) {
restoreApplyingEnd(*applyingEnd);
}
}
}
AtomicWord<int64_t> _deletesApplied;
AtomicWord<int64_t> _insertsApplied;
AtomicWord<int64_t> _updatesApplied;
AtomicWord<int64_t> _oplogEntriesApplied;
AtomicWord<int64_t> _oplogEntriesFetched;
AtomicWord<Date_t> _applyingStartTime;
AtomicWord<Date_t> _applyingEndTime;
MetricsStateHolder<State, ReshardingCumulativeMetrics> _stateHolder;
ShardingDataTransformInstanceMetrics::UniqueScopedObserver _scopedObserver;
ReshardingMetricsFieldNameProvider* _reshardingFieldNames;
};
} // namespace mongo
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