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/**
* 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.
*/
#pragma once
#include "mongo/base/status.h"
#include "mongo/db/auth/authorization_checks.h"
#include "mongo/db/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/db/pipeline/aggregate_command_gen.h"
#include "mongo/db/pipeline/lite_parsed_pipeline.h"
#include "mongo/db/views/resolved_view.h"
#include "mongo/s/query/cluster_aggregate.h"
namespace mongo {
namespace {
template <typename Impl>
class ClusterPipelineCommandBase final : public Command {
public:
ClusterPipelineCommandBase() : Command(Impl::kName) {}
const std::set<std::string>& apiVersions() const {
return Impl::getApiVersions();
}
/**
* It's not known until after parsing whether or not an aggregation command is an explain
* request, because it might include the `explain: true` field (ie. aggregation explains do not
* need to arrive via the `explain` command). Therefore even parsing of regular aggregation
* commands needs to be able to handle the explain case.
*
* As a result, aggregation command parsing is done in parseForExplain():
*
* - To parse a regular aggregation command, call parseForExplain() with `explainVerbosity` of
* boost::none.
*
* - To parse an aggregation command as the sub-command in an `explain` command, call
* parseForExplain() with `explainVerbosity` set to the desired verbosity.
*/
std::unique_ptr<CommandInvocation> parse(OperationContext* opCtx,
const OpMsgRequest& opMsgRequest) override {
return parseForExplain(opCtx, opMsgRequest, boost::none);
}
std::unique_ptr<CommandInvocation> parseForExplain(
OperationContext* opCtx,
const OpMsgRequest& opMsgRequest,
boost::optional<ExplainOptions::Verbosity> explainVerbosity) override {
const auto aggregationRequest =
Impl::parseAggregationRequest(opCtx,
opMsgRequest,
explainVerbosity,
APIParameters::get(opCtx).getAPIStrict().value_or(false));
auto privileges = uassertStatusOK(
auth::getPrivilegesForAggregate(AuthorizationSession::get(opCtx->getClient()),
aggregationRequest.getNamespace(),
aggregationRequest,
true));
return std::make_unique<Invocation>(
this, opMsgRequest, std::move(aggregationRequest), std::move(privileges));
}
class Invocation final : public CommandInvocation {
public:
Invocation(Command* cmd,
const OpMsgRequest& request,
AggregateCommandRequest aggregationRequest,
PrivilegeVector privileges)
: CommandInvocation(cmd),
_request(request),
_dbName(request.getDatabase().toString()),
_aggregationRequest(std::move(aggregationRequest)),
_liteParsedPipeline(LiteParsedPipeline(_aggregationRequest)),
_privileges(std::move(privileges)) {}
private:
bool supportsWriteConcern() const override {
return true;
}
ReadConcernSupportResult supportsReadConcern(repl::ReadConcernLevel level,
bool isImplicitDefault) const override {
return _liteParsedPipeline.supportsReadConcern(
level,
isImplicitDefault,
_aggregationRequest.getExplain(),
serverGlobalParams.enableMajorityReadConcern);
}
void _runAggCommand(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder* result) {
const auto& nss = _aggregationRequest.getNamespace();
try {
uassertStatusOK(
ClusterAggregate::runAggregate(opCtx,
ClusterAggregate::Namespaces{nss, nss},
_aggregationRequest,
_liteParsedPipeline,
_privileges,
result));
} catch (const ExceptionFor<ErrorCodes::CommandOnShardedViewNotSupportedOnMongod>& ex) {
// If the aggregation failed because the namespace is a view, re-run the command
// with the resolved view pipeline and namespace.
uassertStatusOK(ClusterAggregate::retryOnViewError(opCtx,
_aggregationRequest,
*ex.extraInfo<ResolvedView>(),
nss,
_privileges,
result));
}
}
void run(OperationContext* opCtx, rpc::ReplyBuilderInterface* reply) override {
CommandHelpers::handleMarkKillOnClientDisconnect(
opCtx, !Pipeline::aggHasWriteStage(_request.body));
Impl::checkCanRunHere(opCtx);
auto bob = reply->getBodyBuilder();
_runAggCommand(opCtx, _dbName, _request.body, &bob);
}
void explain(OperationContext* opCtx,
ExplainOptions::Verbosity verbosity,
rpc::ReplyBuilderInterface* result) override {
Impl::checkCanRunHere(opCtx);
auto bodyBuilder = result->getBodyBuilder();
_runAggCommand(opCtx, _dbName, _request.body, &bodyBuilder);
}
void doCheckAuthorization(OperationContext* opCtx) const override {
Impl::doCheckAuthorization(opCtx, _privileges);
}
NamespaceString ns() const override {
return _aggregationRequest.getNamespace();
}
const OpMsgRequest& _request;
const std::string _dbName;
AggregateCommandRequest _aggregationRequest;
const LiteParsedPipeline _liteParsedPipeline;
const PrivilegeVector _privileges;
};
std::string help() const override {
return "Runs the sharded aggregation command. See "
"http://dochub.mongodb.org/core/aggregation for more details.";
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kAlways;
}
ReadWriteType getReadWriteType() const override {
return ReadWriteType::kRead;
}
bool adminOnly() const override {
return false;
}
const AuthorizationContract* getAuthorizationContract() const final {
return &::mongo::AggregateCommandRequest::kAuthorizationContract;
}
bool allowedInTransactions() const final {
return true;
}
};
} // namespace
} // namespace mongo
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