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/**
* Copyright (C) 2020-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 <memory>
#include <vector>
#include "mongo/bson/timestamp.h"
#include "mongo/db/catalog/collection_catalog.h"
#include "mongo/db/exec/document_value/value.h"
#include "mongo/db/namespace_string.h"
#include "mongo/db/pipeline/expression_context.h"
#include "mongo/db/pipeline/pipeline.h"
#include "mongo/db/repl/oplog.h"
#include "mongo/s/shard_key_pattern.h"
#include "mongo/util/future.h"
namespace mongo {
namespace executor {
class TaskExecutor;
} // namespace executor
class OperationContext;
class ServiceContext;
class ReshardingCollectionCloner {
public:
ReshardingCollectionCloner(ShardKeyPattern newShardKeyPattern,
NamespaceString sourceNss,
CollectionUUID sourceUUID,
ShardId recipientShard,
Timestamp atClusterTime,
NamespaceString outputNss);
std::unique_ptr<Pipeline, PipelineDeleter> makePipeline(
OperationContext* opCtx,
std::shared_ptr<MongoProcessInterface> mongoProcessInterface,
Value resumeId = Value());
ExecutorFuture<void> run(std::shared_ptr<executor::TaskExecutor> executor,
CancelationToken cancelToken);
private:
Value _findHighestInsertedId(OperationContext* opCtx);
std::unique_ptr<Pipeline, PipelineDeleter> _targetAggregationRequest(OperationContext* opCtx,
const Pipeline& pipeline);
std::vector<InsertStatement> _fillBatch(Pipeline& pipeline);
void _insertBatch(OperationContext* opCtx, std::vector<InsertStatement>& batch);
template <typename Callable>
auto _withTemporaryOperationContext(Callable&& callable);
const ShardKeyPattern _newShardKeyPattern;
const NamespaceString _sourceNss;
const CollectionUUID _sourceUUID;
const ShardId _recipientShard;
const Timestamp _atClusterTime;
const NamespaceString _outputNss;
};
} // namespace mongo
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