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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 "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
#include "mongo/db/write_concern_options.h"
namespace mongo {
/**
* Container for server-wide statistics on writeConcern levels used by operations.
*/
class ServerWriteConcernMetrics {
MONGO_DISALLOW_COPYING(ServerWriteConcernMetrics);
public:
ServerWriteConcernMetrics() = default;
static ServerWriteConcernMetrics* get(ServiceContext* service);
static ServerWriteConcernMetrics* get(OperationContext* opCtx);
/**
* Updates the insert metrics 'numInserts' times according to the 'w' value of
* 'writeConcernOptions'.
*/
void recordWriteConcernForInserts(const WriteConcernOptions& writeConcernOptions,
size_t numInserts);
/**
* Updates the insert metrics according to the 'w' value of 'writeConcernOptions'.
*/
void recordWriteConcernForInsert(const WriteConcernOptions& writeConcernOptions) {
recordWriteConcernForInserts(writeConcernOptions, 1);
}
/**
* Updates the update metrics according to the 'w' value of 'writeConcernOptions'.
*/
void recordWriteConcernForUpdate(const WriteConcernOptions& writeConcernOptions);
/**
* Updates the delete metrics according to the 'w' value of 'writeConcernOptions'.
*/
void recordWriteConcernForDelete(const WriteConcernOptions& writeConcernOptions);
BSONObj toBSON() const;
private:
struct WriteConcernMetricsForOperationType {
/**
* Updates counter for the 'w' value of 'writeConcernOptions'.
*/
void recordWriteConcern(const WriteConcernOptions& writeConcernOptions, size_t numOps = 1);
void toBSON(BSONObjBuilder* builder) const;
// Count of operations with writeConcern w:"majority".
long long wMajorityCount = 0;
// Count of operations without a writeConcern "w" value.
long long noWCount = 0;
// Counts of operations with writeConcern w:<num>.
std::map<int, long long> wNumCounts;
// Counts of operations with writeConcern w:"tag".
StringMap<long long> wTagCounts;
};
mutable stdx::mutex _mutex;
WriteConcernMetricsForOperationType _insertMetrics;
WriteConcernMetricsForOperationType _updateMetrics;
WriteConcernMetricsForOperationType _deleteMetrics;
};
} // namespace mongo
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