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Diffstat (limited to 'src/mongo/db/query/telemetry_util.cpp')
-rw-r--r-- | src/mongo/db/query/telemetry_util.cpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/mongo/db/query/telemetry_util.cpp b/src/mongo/db/query/telemetry_util.cpp new file mode 100644 index 00000000000..eeaf7da71e6 --- /dev/null +++ b/src/mongo/db/query/telemetry_util.cpp @@ -0,0 +1,97 @@ +/** + * 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. + */ + +#include "mongo/db/query/telemetry_util.h" + +#include "mongo/base/status.h" +#include "mongo/db/concurrency/d_concurrency.h" +#include "mongo/db/query/partitioned_cache.h" +#include "mongo/db/query/query_knobs_gen.h" +#include "mongo/db/query/util/memory_util.h" +#include "mongo/db/service_context.h" +#include "mongo/logv2/log.h" + + +#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kQuery + +namespace mongo::telemetry_util { + +namespace { +/** + * Given the current 'Client', returns a pointer to the 'ServiceContext' and an interface for + * updating the telemetry store. + */ +std::pair<ServiceContext*, OnParamChangeUpdater*> getUpdater(const Client& client) { + auto serviceCtx = client.getServiceContext(); + tassert(7106500, "ServiceContext must be non null", serviceCtx); + + auto updater = telemetryStoreOnParamChangeUpdater(serviceCtx).get(); + tassert(7106501, "Telemetry store size updater must be non null", updater); + return {serviceCtx, updater}; +} +} // namespace + + +Status onTelemetryStoreSizeUpdate(const std::string& str) { + auto newSize = memory_util::MemorySize::parse(str); + if (!newSize.isOK()) { + return newSize.getStatus(); + } + + // The client is nullptr if the parameter is supplied from the command line. In this case, we + // ignore the update event, the parameter will be processed when initializing the service + // context. + if (auto client = Client::getCurrent()) { + auto&& [serviceCtx, updater] = getUpdater(*client); + updater->updateCacheSize(serviceCtx, newSize.getValue()); + } + + return Status::OK(); +} + +Status validateTelemetryStoreSize(const std::string& str, const boost::optional<TenantId>&) { + return memory_util::MemorySize::parse(str).getStatus(); +} + +Status onTelemetrySamplingRateUpdate(int samplingRate) { + // The client is nullptr if the parameter is supplied from the command line. In this case, we + // ignore the update event, the parameter will be processed when initializing the service + // context. + if (auto client = Client::getCurrent()) { + auto&& [serviceCtx, updater] = getUpdater(*client); + updater->updateSamplingRate(serviceCtx, samplingRate < 0 ? INT_MAX : samplingRate); + } + + return Status::OK(); +} + +const Decorable<ServiceContext>::Decoration<std::unique_ptr<OnParamChangeUpdater>> + telemetryStoreOnParamChangeUpdater = + ServiceContext::declareDecoration<std::unique_ptr<OnParamChangeUpdater>>(); +} // namespace mongo::telemetry_util |