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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.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kQuery
#include "mongo/platform/basic.h"
#include "mongo/db/pipeline/document_source_internal_apply_oplog_update.h"
#include <boost/optional.hpp>
#include <boost/smart_ptr/intrusive_ptr.hpp>
#include "mongo/db/exec/add_fields_projection_executor.h"
#include "mongo/db/exec/document_value/document.h"
#include "mongo/db/ops/write_ops_parsers.h"
#include "mongo/db/pipeline/document_source_internal_apply_oplog_update_gen.h"
#include "mongo/db/pipeline/lite_parsed_document_source.h"
#include "mongo/db/update/update_driver.h"
namespace mongo {
REGISTER_DOCUMENT_SOURCE(_internalApplyOplogUpdate,
LiteParsedDocumentSourceDefault::parse,
DocumentSourceInternalApplyOplogUpdate::createFromBson,
AllowedWithApiStrict::kNeverInVersion1);
boost::intrusive_ptr<DocumentSource> DocumentSourceInternalApplyOplogUpdate::createFromBson(
BSONElement elem, const boost::intrusive_ptr<ExpressionContext>& pExpCtx) {
uassert(6315901,
str::stream() << "Argument to " << kStageName
<< " stage must be an object, but found type: " << typeName(elem.type()),
elem.type() == BSONType::Object);
auto spec = InternalApplyOplogUpdateSpec::parse(IDLParserErrorContext(kStageName),
elem.embeddedObject());
return new DocumentSourceInternalApplyOplogUpdate(pExpCtx, spec.getOplogUpdate());
}
DocumentSourceInternalApplyOplogUpdate::DocumentSourceInternalApplyOplogUpdate(
const boost::intrusive_ptr<ExpressionContext>& pExpCtx, const BSONObj& oplogUpdate)
: DocumentSource(kStageName, pExpCtx),
_oplogUpdate(std::move(oplogUpdate)),
_updateDriver(pExpCtx) {
// Parse the raw oplog update description.
const auto updateMod = write_ops::UpdateModification::parseFromOplogEntry(
_oplogUpdate, {true /* mustCheckExistenceForInsertOperations */});
// UpdateDriver only expects to apply a diff in the context of oplog application.
_updateDriver.setFromOplogApplication(true);
_updateDriver.parse(updateMod, {});
}
DocumentSource::GetNextResult DocumentSourceInternalApplyOplogUpdate::doGetNext() {
auto next = pSource->getNext();
if (!next.isAdvanced()) {
return next;
}
// Use _updateDriver to apply the update to the document.
mutablebson::Document doc(next.getDocument().toBson());
uassertStatusOK(_updateDriver.update(pExpCtx->opCtx,
StringData(),
&doc,
false /* validateForStorage */,
FieldRefSet(),
false /* isInsert */));
return Document(doc.getObject());
}
Value DocumentSourceInternalApplyOplogUpdate::serialize(
boost::optional<ExplainOptions::Verbosity> explain) const {
return Value(Document{{kStageName, Document{{kOplogUpdateFieldName, _oplogUpdate}}}});
}
} // namespace mongo
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