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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.
*/
#include "mongo/platform/basic.h"
#include "mongo/db/stats/server_read_concern_metrics.h"
#include "mongo/db/commands/server_status.h"
#include "mongo/db/jsobj.h"
#include "mongo/db/operation_context.h"
#include "mongo/db/service_context.h"
namespace mongo {
namespace {
const auto ServerReadConcernMetricsDecoration =
ServiceContext::declareDecoration<ServerReadConcernMetrics>();
} // namespace
ServerReadConcernMetrics* ServerReadConcernMetrics::get(ServiceContext* service) {
return &ServerReadConcernMetricsDecoration(service);
}
ServerReadConcernMetrics* ServerReadConcernMetrics::get(OperationContext* opCtx) {
return get(opCtx->getServiceContext());
}
void ServerReadConcernMetrics::recordReadConcern(const repl::ReadConcernArgs& readConcernArgs) {
if (!readConcernArgs.hasOriginalLevel()) {
_noLevelCount.fetchAndAdd(1);
return;
}
switch (readConcernArgs.getOriginalLevel()) {
case repl::ReadConcernLevel::kAvailableReadConcern:
_levelAvailableCount.fetchAndAdd(1);
break;
case repl::ReadConcernLevel::kLinearizableReadConcern:
_levelLinearizableCount.fetchAndAdd(1);
break;
case repl::ReadConcernLevel::kLocalReadConcern:
_levelLocalCount.fetchAndAdd(1);
break;
case repl::ReadConcernLevel::kMajorityReadConcern:
_levelMajorityCount.fetchAndAdd(1);
break;
case repl::ReadConcernLevel::kSnapshotReadConcern:
_levelSnapshotCount.fetchAndAdd(1);
break;
default:
MONGO_UNREACHABLE;
}
}
void ServerReadConcernMetrics::updateStats(ReadConcernStats* stats, OperationContext* opCtx) {
stats->setAvailable(_levelAvailableCount.load());
stats->setLinearizable(_levelLinearizableCount.load());
stats->setLocal(_levelLocalCount.load());
stats->setMajority(_levelMajorityCount.load());
stats->setSnapshot(_levelSnapshotCount.load());
stats->setNone(_noLevelCount.load());
}
namespace {
class OpReadConcernCountersSSS : public ServerStatusSection {
public:
OpReadConcernCountersSSS() : ServerStatusSection("opReadConcernCounters") {}
~OpReadConcernCountersSSS() override = default;
bool includeByDefault() const override {
return true;
}
BSONObj generateSection(OperationContext* opCtx,
const BSONElement& configElement) const override {
ReadConcernStats stats;
ServerReadConcernMetrics::get(opCtx)->updateStats(&stats, opCtx);
return stats.toBSON();
}
} opReadConcernCountersSSS;
} // namespace
} // namespace mongo
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