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/**
* Copyright (C) 2021-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/db/pipeline/change_stream_helpers_legacy.h"
#include "mongo/db/pipeline/change_stream_filter_helpers.h"
#include "mongo/db/pipeline/document_source_change_stream_add_post_image.h"
#include "mongo/db/pipeline/document_source_change_stream_add_pre_image.h"
#include "mongo/db/pipeline/document_source_change_stream_check_invalidate.h"
#include "mongo/db/pipeline/document_source_change_stream_check_resumability.h"
#include "mongo/db/pipeline/document_source_change_stream_check_topology_change.h"
#include "mongo/db/pipeline/document_source_change_stream_ensure_resume_token_present.h"
#include "mongo/db/pipeline/document_source_change_stream_handle_topology_change.h"
#include "mongo/db/pipeline/document_source_change_stream_oplog_match.h"
#include "mongo/db/pipeline/document_source_change_stream_transform.h"
#include "mongo/db/pipeline/document_source_change_stream_unwind_transaction.h"
#include "mongo/db/pipeline/expression.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kCommand
namespace mongo {
namespace change_stream_legacy {
// TODO SERVER-66138: This function can be removed after we branch for 7.0.
void populateInternalOperationFilter(const boost::intrusive_ptr<ExpressionContext>& expCtx,
BSONArrayBuilder* orBuilder) {
std::vector<StringData> opTypes = {"reshardBegin"_sd, "reshardDoneCatchUp"_sd};
// Noop change events that are only applicable when merging results on mongoS:
// - migrateChunkToNewShard: A chunk migrated to a shard that didn't have any chunks.
if (expCtx->inMongos || expCtx->needsMerge) {
opTypes.push_back("migrateChunkToNewShard"_sd);
}
for (const auto& eventName : opTypes) {
// Legacy oplog messages used the "o2.type" field to indicate the message type.
orBuilder->append(BSON("o2.type" << eventName));
}
}
// TODO SERVER-66138: This function can be removed after we branch for 7.0.
Document convertFromLegacyOplogFormat(const Document& o2Entry, const NamespaceString& nss) {
auto type = o2Entry["type"];
if (type.missing()) {
return o2Entry;
}
MutableDocument doc(o2Entry);
doc.remove("type");
// This field would be the first field in the new format, but the current change stream code
// does not depend on the field order.
doc.addField(type.getString(), Value(nss.toString()));
return doc.freeze();
}
// TODO SERVER-66138: This function can be removed after we branch for 7.0.
StringData getNewShardDetectedOpName(const boost::intrusive_ptr<ExpressionContext>& expCtx) {
// The op name on 6.0 and older versions.
const StringData kNewShardDetectedOpTypeLegacyName = "kNewShardDetected"_sd;
return (expCtx->changeStreamTokenVersion == ResumeTokenData::kDefaultTokenVersion)
? DocumentSourceChangeStream::kNewShardDetectedOpType
: kNewShardDetectedOpTypeLegacyName;
}
} // namespace change_stream_legacy
} // namespace mongo
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