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/**
* Copyright (C) 2017 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/pipeline/document_source_internal_split_pipeline.h"
namespace mongo {
REGISTER_DOCUMENT_SOURCE(_internalSplitPipeline,
LiteParsedDocumentSourceDefault::parse,
DocumentSourceInternalSplitPipeline::createFromBson);
constexpr StringData DocumentSourceInternalSplitPipeline::kStageName;
boost::intrusive_ptr<DocumentSource> DocumentSourceInternalSplitPipeline::createFromBson(
BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& expCtx) {
uassert(ErrorCodes::TypeMismatch,
str::stream() << "$_internalSplitPipeline must take a nested object but found: "
<< elem,
elem.type() == BSONType::Object);
auto specObj = elem.embeddedObject();
HostTypeRequirement mergeType = HostTypeRequirement::kNone;
for (auto&& elt : specObj) {
if (elt.fieldNameStringData() == "mergeType"_sd) {
uassert(ErrorCodes::BadValue,
str::stream() << "'mergeType' must be a string value but found: " << elt.type(),
elt.type() == BSONType::String);
auto mergeTypeString = elt.valueStringData();
if ("localOnly"_sd == mergeTypeString) {
mergeType = HostTypeRequirement::kLocalOnly;
} else if ("anyShard"_sd == mergeTypeString) {
mergeType = HostTypeRequirement::kAnyShard;
} else if ("primaryShard"_sd == mergeTypeString) {
mergeType = HostTypeRequirement::kPrimaryShard;
} else if ("mongos"_sd == mergeTypeString) {
mergeType = HostTypeRequirement::kMongoS;
} else {
uasserted(ErrorCodes::BadValue,
str::stream() << "unrecognized field while parsing mergeType: '"
<< elt.fieldNameStringData()
<< "'");
}
} else {
uasserted(ErrorCodes::BadValue,
str::stream() << "unrecognized field while parsing $_internalSplitPipeline: '"
<< elt.fieldNameStringData()
<< "'");
}
}
return new DocumentSourceInternalSplitPipeline(expCtx, mergeType);
}
DocumentSource::GetNextResult DocumentSourceInternalSplitPipeline::getNext() {
pExpCtx->checkForInterrupt();
return pSource->getNext();
}
Value DocumentSourceInternalSplitPipeline::serialize(
boost::optional<ExplainOptions::Verbosity> explain) const {
std::string mergeTypeString;
switch (_mergeType) {
case HostTypeRequirement::kAnyShard:
mergeTypeString = "anyShard";
break;
case HostTypeRequirement::kPrimaryShard:
mergeTypeString = "primaryShard";
break;
case HostTypeRequirement::kLocalOnly:
mergeTypeString = "localOnly";
break;
case HostTypeRequirement::kMongoS:
mergeTypeString = "mongos";
break;
case HostTypeRequirement::kNone:
default:
break;
}
return Value(
Document{{getSourceName(),
Value{Document{{"mergeType",
mergeTypeString.empty() ? Value() : Value(mergeTypeString)}}}}});
}
} // namesace mongo
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