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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/embedded/service_entry_point_embedded.h"
#include "mongo/db/read_concern.h"
#include "mongo/db/repl/speculative_majority_read_info.h"
#include "mongo/db/service_entry_point_common.h"
#include "mongo/embedded/not_implemented.h"
#include "mongo/embedded/periodic_runner_embedded.h"
#include "mongo/transport/service_executor.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
namespace mongo {
namespace {
/**
* Use the dedicated threading model for embedded clients. The following ensures any request
* initiated by the embedded service entry point will always go through the synchronous command
* execution path, and will never get scheduled on a borrowed thread.
*/
class EmbeddedClientObserver final : public ServiceContext::ClientObserver {
void onCreateClient(Client* client) {
auto seCtx = std::make_unique<transport::ServiceExecutorContext>();
seCtx->setUseDedicatedThread(true);
transport::ServiceExecutorContext::set(client, std::move(seCtx));
}
void onDestroyClient(Client*) {}
void onCreateOperationContext(OperationContext*) {}
void onDestroyOperationContext(OperationContext*) {}
};
ServiceContext::ConstructorActionRegisterer registerClientObserverConstructor{
"EmbeddedClientObserverConstructor", [](ServiceContext* service) {
service->registerClientObserver(std::make_unique<EmbeddedClientObserver>());
}};
} // namespace
class ServiceEntryPointEmbedded::Hooks final : public ServiceEntryPointCommon::Hooks {
public:
bool lockedForWriting() const override {
return false;
}
void setPrepareConflictBehaviorForReadConcern(
OperationContext* opCtx, const CommandInvocation* invocation) const override {
mongo::setPrepareConflictBehaviorForReadConcern(
opCtx, repl::ReadConcernArgs::get(opCtx), PrepareConflictBehavior::kEnforce);
}
void waitForReadConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const OpMsgRequest& request) const override {
auto rcStatus = mongo::waitForReadConcern(opCtx,
repl::ReadConcernArgs::get(opCtx),
invocation->ns().dbName(),
invocation->allowsAfterClusterTime());
uassertStatusOK(rcStatus);
}
void waitForSpeculativeMajorityReadConcern(OperationContext* opCtx) const override {
auto rcStatus = mongo::waitForSpeculativeMajorityReadConcern(
opCtx, repl::SpeculativeMajorityReadInfo::get(opCtx));
uassertStatusOK(rcStatus);
}
void waitForWriteConcern(OperationContext* opCtx,
const CommandInvocation* invocation,
const repl::OpTime& lastOpBeforeRun,
BSONObjBuilder& commandResponseBuilder) const override {
WriteConcernResult res;
auto waitForWCStatus =
mongo::waitForWriteConcern(opCtx, lastOpBeforeRun, opCtx->getWriteConcern(), &res);
CommandHelpers::appendCommandWCStatus(commandResponseBuilder, waitForWCStatus, res);
}
void waitForLinearizableReadConcern(OperationContext* opCtx) const override {
if (repl::ReadConcernArgs::get(opCtx).getLevel() ==
repl::ReadConcernLevel::kLinearizableReadConcern) {
uassertStatusOK(mongo::waitForLinearizableReadConcern(opCtx, Milliseconds::zero()));
}
}
void uassertCommandDoesNotSpecifyWriteConcern(const BSONObj& cmd) const override {
if (commandSpecifiesWriteConcern(cmd)) {
uasserted(ErrorCodes::InvalidOptions, "Command does not support writeConcern");
}
}
void attachCurOpErrInfo(OperationContext*, const BSONObj&) const override {}
bool refreshDatabase(OperationContext* opCtx,
const StaleDbRoutingVersion& se) const noexcept override {
return false;
}
bool refreshCollection(OperationContext* opCtx,
const StaleConfigInfo& se) const noexcept override {
return false;
}
bool refreshCatalogCache(
OperationContext* opCtx,
const ShardCannotRefreshDueToLocksHeldInfo& refreshInfo) const noexcept override {
return false;
}
void handleReshardingCriticalSectionMetrics(OperationContext* opCtx,
const StaleConfigInfo& se) const noexcept override {
}
void resetLockerState(OperationContext* opCtx) const noexcept override {}
std::unique_ptr<PolymorphicScoped> scopedOperationCompletionShardingActions(
OperationContext* opCtx) const override {
return nullptr;
}
void appendReplyMetadata(OperationContext* opCtx,
const OpMsgRequest& request,
BSONObjBuilder* metadataBob) const override {}
};
Future<DbResponse> ServiceEntryPointEmbedded::handleRequest(OperationContext* opCtx,
const Message& m) noexcept {
// Only one thread will pump at a time and concurrent calls to this will skip the pumping and go
// directly to handleRequest. This means that the jobs in the periodic runner can't provide any
// guarantees of the state (that they have run).
checked_cast<PeriodicRunnerEmbedded*>(opCtx->getServiceContext()->getPeriodicRunner())
->tryPump();
return ServiceEntryPointCommon::handleRequest(opCtx, m, std::make_unique<Hooks>());
}
void ServiceEntryPointEmbedded::startSession(std::shared_ptr<transport::Session> session) {
UASSERT_NOT_IMPLEMENTED;
}
void ServiceEntryPointEmbedded::endAllSessions(transport::Session::TagMask tags) {}
Status ServiceEntryPointEmbedded::start() {
UASSERT_NOT_IMPLEMENTED;
}
bool ServiceEntryPointEmbedded::shutdown(Milliseconds timeout) {
UASSERT_NOT_IMPLEMENTED;
}
void ServiceEntryPointEmbedded::appendStats(BSONObjBuilder*) const {
UASSERT_NOT_IMPLEMENTED;
}
size_t ServiceEntryPointEmbedded::numOpenSessions() const {
UASSERT_NOT_IMPLEMENTED;
}
logv2::LogSeverity ServiceEntryPointEmbedded::slowSessionWorkflowLogSeverity() {
UASSERT_NOT_IMPLEMENTED;
}
} // namespace mongo
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