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/**
* Copyright (c) 2011-2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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/auth/authorization_session.h"
#include "mongo/db/commands.h"
#include "mongo/db/commands/run_aggregate.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/pipeline/pipeline.h"
namespace mongo {
namespace {
bool isMergePipeline(const std::vector<BSONObj>& pipeline) {
if (pipeline.empty()) {
return false;
}
return pipeline[0].hasField("$mergeCursors");
}
class PipelineCommand : public BasicCommand {
public:
PipelineCommand() : BasicCommand("aggregate") {}
std::string help() const override {
return "Runs the aggregation command. See http://dochub.mongodb.org/core/aggregation for "
"more details.";
}
bool supportsWriteConcern(const BSONObj& cmd) const override {
return Pipeline::aggSupportsWriteConcern(cmd);
}
AllowedOnSecondary secondaryAllowed(ServiceContext*) const override {
return AllowedOnSecondary::kOptIn;
}
bool supportsReadConcern(const std::string& dbName,
const BSONObj& cmdObj,
repl::ReadConcernLevel level) const override {
return level == repl::ReadConcernLevel::kLocalReadConcern ||
!AggregationRequest::parseNs(dbName, cmdObj).isCollectionlessAggregateNS();
}
ReadWriteType getReadWriteType() const {
return ReadWriteType::kRead;
}
Status checkAuthForCommand(Client* client,
const std::string& dbname,
const BSONObj& cmdObj) const override {
const NamespaceString nss(AggregationRequest::parseNs(dbname, cmdObj));
return AuthorizationSession::get(client)->checkAuthForAggregate(nss, cmdObj, false);
}
bool run(OperationContext* opCtx,
const std::string& dbname,
const BSONObj& cmdObj,
BSONObjBuilder& result) override {
const auto aggregationRequest =
uassertStatusOK(AggregationRequest::parseFromBSON(dbname, cmdObj, boost::none));
return CommandHelpers::appendCommandStatus(
result,
runAggregate(opCtx,
aggregationRequest.getNamespaceString(),
aggregationRequest,
cmdObj,
result));
}
Status explain(OperationContext* opCtx,
const OpMsgRequest& request,
ExplainOptions::Verbosity verbosity,
BSONObjBuilder* out) const override {
std::string dbname = request.getDatabase().toString();
const BSONObj& cmdObj = request.body;
const auto aggregationRequest =
uassertStatusOK(AggregationRequest::parseFromBSON(dbname, cmdObj, verbosity));
return runAggregate(
opCtx, aggregationRequest.getNamespaceString(), aggregationRequest, cmdObj, *out);
}
} pipelineCmd;
} // namespace
} // namespace mongo
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