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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 "mongo/db/operation_context.h"
#include "mongo/db/s/config/initial_split_policy.h"
#include "mongo/db/s/shard_filtering_metadata_refresh.h"
#include "mongo/db/s/sharding_ddl_coordinator.h"
#include "mongo/s/request_types/sharded_ddl_commands_gen.h"
#include "mongo/util/future.h"
namespace mongo {
class CreateCollectionCoordinator final
: public ShardingDDLCoordinator,
public std::enable_shared_from_this<CreateCollectionCoordinator> {
public:
CreateCollectionCoordinator(OperationContext* opCtx, const ShardsvrCreateCollection& request);
/**
* Returns the information of the newly created collection, or the already existing one. It must
* be called after a successfull execution of run.
*/
const CreateCollectionResponse& getResultOnSuccess() {
return *_result;
}
private:
SemiFuture<void> runImpl(std::shared_ptr<executor::TaskExecutor> executor) override;
/**
* Performs all required checks before holding the critical sections.
*/
void _checkCommandArguments(OperationContext* opCtx);
/**
* Ensures the collection is created locally and has the appropiate shard index.
*/
void _createCollectionAndIndexes(OperationContext* opCtx);
/**
* Given the appropiate split policy, create the initial chunks.
*/
void _createChunks(OperationContext* opCtx);
/**
* If the optimized path can be taken, ensure the collection is already created in all the
* participant shards.
*/
void _createCollectionOnNonPrimaryShards(OperationContext* opCtx);
/**
* Does the following writes:
* 1. Updates the config.collections entry for the new sharded collection
* 2. Updates config.chunks entries for the new sharded collection
*/
void _commit(OperationContext* opCtx);
/**
* Refresh all participant shards and log creation.
*/
void _cleanup(OperationContext* opCtx);
ServiceContext* _serviceContext;
const ShardsvrCreateCollection _request;
const NamespaceString& _nss;
boost::optional<ShardKeyPattern> _shardKeyPattern;
boost::optional<BSONObj> _collation;
boost::optional<UUID> _collectionUUID;
std::unique_ptr<InitialSplitPolicy> _splitPolicy;
InitialSplitPolicy::ShardCollectionConfig _initialChunks;
boost::optional<CreateCollectionResponse> _result;
};
} // namespace mongo
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