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/**
* Copyright (C) 2019-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/db/commands/server_status.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/s/transaction_coordinators_stats_gen.h"
#include "mongo/db/service_context.h"
namespace mongo {
/**
* Container for server-wide metrics about transaction two-phase commits.
*/
class ServerTransactionCoordinatorsMetrics {
ServerTransactionCoordinatorsMetrics(const ServerTransactionCoordinatorsMetrics&) = delete;
ServerTransactionCoordinatorsMetrics& operator=(const ServerTransactionCoordinatorsMetrics&) =
delete;
public:
ServerTransactionCoordinatorsMetrics() = default;
static ServerTransactionCoordinatorsMetrics* get(ServiceContext* service);
static ServerTransactionCoordinatorsMetrics* get(OperationContext* opCtx);
std::int64_t getTotalCreated();
void incrementTotalCreated();
std::int64_t getTotalStartedTwoPhaseCommit();
void incrementTotalStartedTwoPhaseCommit();
std::int64_t getCurrentWritingParticipantList();
void incrementCurrentWritingParticipantList();
void decrementCurrentWritingParticipantList();
std::int64_t getCurrentWaitingForVotes();
void incrementCurrentWaitingForVotes();
void decrementCurrentWaitingForVotes();
std::int64_t getCurrentWritingDecision();
void incrementCurrentWritingDecision();
void decrementCurrentWritingDecision();
std::int64_t getCurrentWaitingForDecisionAcks();
void incrementCurrentWaitingForDecisionAcks();
void decrementCurrentWaitingForDecisionAcks();
std::int64_t getCurrentDeletingCoordinatorDoc();
void incrementCurrentDeletingCoordinatorDoc();
void decrementCurrentDeletingCoordinatorDoc();
std::int64_t getTotalAbortedTwoPhaseCommit();
void incrementTotalAbortedTwoPhaseCommit();
std::int64_t getTotalSuccessfulTwoPhaseCommit();
void incrementTotalSuccessfulTwoPhaseCommit();
/**
* Appends the accumulated stats to a transaction coordinators stats object for reporting.
*/
void updateStats(TransactionCoordinatorsStats* stats);
private:
// The total number of transaction coordinators created on this process since the process's
// inception.
AtomicWord<std::int64_t> _totalCreated{0};
// The total number of transaction coordinators on this process that started a two-phase commit
// since the process's inception.
AtomicWord<std::int64_t> _totalStartedTwoPhaseCommit{0};
// The total number of transaction coordinators on this process that aborted a two-phase commit
// since the process's inception.
AtomicWord<std::int64_t> _totalAbortedTwoPhaseCommit{0};
// The total number of transaction coordinators on this process that committed a two-phase
// commit since the process's inception.
AtomicWord<std::int64_t> _totalSuccessfulTwoPhaseCommit{0};
// The number of transaction coordinators currently in the "writing participant list" phase.
AtomicWord<std::int64_t> _totalWritingParticipantList{0};
// The number of transaction coordinators currently in the "waiting for votes" phase.
AtomicWord<std::int64_t> _totalWaitingForVotes{0};
// The number of transaction coordinators currently in the "writing decision" phase.
AtomicWord<std::int64_t> _totalWritingDecision{0};
// The number of transaction coordinators currently in the "waiting for decision acks" phase.
AtomicWord<std::int64_t> _totalWaitingForDecisionAcks{0};
// The number of transaction coordinators currently in the "deleting coordinator doc" phase.
AtomicWord<std::int64_t> _totalDeletingCoordinatorDoc{0};
};
class TransactionCoordinatorsSSS final : public ServerStatusSection {
public:
TransactionCoordinatorsSSS() : ServerStatusSection("twoPhaseCommitCoordinator") {}
bool includeByDefault() const override {
return true;
}
BSONObj generateSection(OperationContext* opCtx,
const BSONElement& configElement) const override;
};
} // namespace mongo
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