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/**
* Copyright (C) 2018-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 <set>
#include "mongo/bson/timestamp.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/service_context.h"
#include "mongo/db/transactions_stats_gen.h"
#include "mongo/platform/mutex.h"
#include "mongo/util/concurrency/with_lock.h"
namespace mongo {
/**
* Container for server-wide multi-document transaction statistics.
*/
class ServerTransactionsMetrics {
ServerTransactionsMetrics(const ServerTransactionsMetrics&) = delete;
ServerTransactionsMetrics& operator=(const ServerTransactionsMetrics&) = delete;
public:
ServerTransactionsMetrics() = default;
static ServerTransactionsMetrics* get(ServiceContext* service);
static ServerTransactionsMetrics* get(OperationContext* opCtx);
unsigned long long getCurrentActive() const;
void decrementCurrentActive();
void incrementCurrentActive();
unsigned long long getCurrentInactive() const;
void decrementCurrentInactive();
void incrementCurrentInactive();
unsigned long long getCurrentOpen() const;
void decrementCurrentOpen();
void incrementCurrentOpen();
unsigned long long getTotalStarted() const;
void incrementTotalStarted();
unsigned long long getTotalAborted() const;
void incrementTotalAborted();
unsigned long long getTotalCommitted() const;
void incrementTotalCommitted();
unsigned long long getTotalPrepared() const;
void incrementTotalPrepared();
unsigned long long getTotalPreparedThenCommitted() const;
void incrementTotalPreparedThenCommitted();
unsigned long long getTotalPreparedThenAborted() const;
void incrementTotalPreparedThenAborted();
unsigned long long getCurrentPrepared() const;
void incrementCurrentPrepared();
void decrementCurrentPrepared();
void updateLastTransaction(size_t operationCount,
size_t oplogOperationBytes,
BSONObj writeConcern);
/**
* Appends the accumulated stats to a transactions stats object.
* Include the 'lastCommittedTransactions' field if 'includeLastCommitted' is true.
*/
void updateStats(TransactionsStats* stats, bool includeLastCommitted);
private:
// The number of multi-document transactions currently active.
AtomicWord<unsigned long long> _currentActive{0};
// The number of multi-document transactions currently inactive.
AtomicWord<unsigned long long> _currentInactive{0};
// The total number of open transactions.
AtomicWord<unsigned long long> _currentOpen{0};
// The total number of multi-document transactions started since the last server startup.
AtomicWord<unsigned long long> _totalStarted{0};
// The total number of multi-document transaction aborts.
AtomicWord<unsigned long long> _totalAborted{0};
// The total number of multi-document transaction commits.
AtomicWord<unsigned long long> _totalCommitted{0};
// The total number of prepared transactions since the last server startup.
AtomicWord<unsigned long long> _totalPrepared{0};
// The total number of prepared transaction commits.
AtomicWord<unsigned long long> _totalPreparedThenCommitted{0};
// The total number of prepared transaction aborts.
AtomicWord<unsigned long long> _totalPreparedThenAborted{0};
// The current number of transactions in the prepared state.
AtomicWord<unsigned long long> _currentPrepared{0};
// Protects member variables below.
mutable Mutex _mutex = MONGO_MAKE_LATCH("ServerTransactionsMetrics::_mutex");
boost::optional<LastCommittedTransaction> _lastCommittedTransaction;
};
} // namespace mongo
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