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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.
*/
#pragma once
#include "mongo/util/functional.h"
#include "mongo/base/string_data.h"
#include "mongo/bson/timestamp.h"
#include "mongo/db/catalog/collection_options.h"
#include "mongo/db/s/migration_destination_manager.h"
#include "mongo/db/s/resharding/resharding_recipient_service.h"
#include "mongo/s/chunk_manager.h"
#include "mongo/s/shard_id.h"
namespace mongo {
class BSONObj;
class CommonReshardingMetadata;
class NamespaceString;
class OperationContext;
class ServiceContext;
/**
* Represents the interface that RecipientStateMachine uses to interact with the rest of the
* sharding codebase.
*
* In particular, RecipientStateMachine must not directly use Grid, ShardingState, or
* ShardingCatalogClient. RecipientStateMachine must instead access those types through the
* RecipientStateMachineExternalState interface. Having it behind an interface makes it more
* straightforward to unit test RecipientStateMachine.
*/
class ReshardingRecipientService::RecipientStateMachineExternalState {
public:
virtual ~RecipientStateMachineExternalState() = default;
virtual ShardId myShardId(ServiceContext* serviceContext) const = 0;
virtual void refreshCatalogCache(OperationContext* opCtx, const NamespaceString& nss) = 0;
virtual ChunkManager getShardedCollectionRoutingInfo(OperationContext* opCtx,
const NamespaceString& nss) = 0;
virtual MigrationDestinationManager::CollectionOptionsAndUUID getCollectionOptions(
OperationContext* opCtx,
const NamespaceString& nss,
const UUID& uuid,
Timestamp afterClusterTime,
StringData reason) = 0;
virtual MigrationDestinationManager::IndexesAndIdIndex getCollectionIndexes(
OperationContext* opCtx,
const NamespaceString& nss,
const UUID& uuid,
Timestamp afterClusterTime,
StringData reason) = 0;
virtual void withShardVersionRetry(OperationContext* opCtx,
const NamespaceString& nss,
StringData reason,
unique_function<void()> callback) = 0;
virtual void updateCoordinatorDocument(OperationContext* opCtx,
const BSONObj& query,
const BSONObj& update) = 0;
virtual void clearFilteringMetadata(OperationContext* opCtx) = 0;
/**
* Creates the temporary resharding collection locally.
*
* The collection options are taken from the primary shard for the source database and the
* collection indexes are taken from the shard which owns the global minimum chunk.
*
* This function won't automatically create an index on the new shard key pattern.
*/
void ensureTempReshardingCollectionExistsWithIndexes(OperationContext* opCtx,
const CommonReshardingMetadata& metadata,
Timestamp cloneTimestamp);
};
class RecipientStateMachineExternalStateImpl
: public ReshardingRecipientService::RecipientStateMachineExternalState {
public:
ShardId myShardId(ServiceContext* serviceContext) const override;
void refreshCatalogCache(OperationContext* opCtx, const NamespaceString& nss) override;
ChunkManager getShardedCollectionRoutingInfo(OperationContext* opCtx,
const NamespaceString& nss) override;
MigrationDestinationManager::CollectionOptionsAndUUID getCollectionOptions(
OperationContext* opCtx,
const NamespaceString& nss,
const UUID& uuid,
Timestamp afterClusterTime,
StringData reason) override;
MigrationDestinationManager::IndexesAndIdIndex getCollectionIndexes(OperationContext* opCtx,
const NamespaceString& nss,
const UUID& uuid,
Timestamp afterClusterTime,
StringData reason) override;
void withShardVersionRetry(OperationContext* opCtx,
const NamespaceString& nss,
StringData reason,
unique_function<void()> callback) override;
void updateCoordinatorDocument(OperationContext* opCtx,
const BSONObj& query,
const BSONObj& update) override;
void clearFilteringMetadata(OperationContext* opCtx) override;
private:
template <typename Callable>
auto _withShardVersionRetry(OperationContext* opCtx,
const NamespaceString& nss,
StringData reason,
Callable&& callable);
};
} // namespace mongo
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