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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 <functional>
#include <string>
#include <vector>
#include "mongo/base/status.h"
#include "mongo/bson/bsonobj.h"
#include "mongo/bson/timestamp.h"
#include "mongo/db/catalog/collection_catalog.h"
#include "mongo/db/db_raii.h"
#include "mongo/db/repl/oplog_entry.h"
#include "mongo/db/repl/oplog_entry_or_grouped_inserts.h"
#include "mongo/db/repl/optime.h"
#include "mongo/db/repl/replication_coordinator.h"
#include "mongo/s/chunk_manager.h"
namespace mongo {
class Collection;
class CollectionPtr;
class NamespaceString;
class OperationContext;
/**
* Applies an operation from an oplog entry using special rules that apply to resharding.
*/
class ReshardingOplogApplicationRules {
public:
ReshardingOplogApplicationRules(const NamespaceString& outputNss,
const NamespaceString& stashNss,
const ShardId& donorShardId,
ChunkManager sourceChunkMgr);
/**
* Wraps the op application in a writeConflictRetry loop and is responsible for creating and
* committing the WUOW.
*/
Status applyOperation(OperationContext* opCtx,
const repl::OplogEntryOrGroupedInserts& opOrGroupedInserts);
private:
// Applies an insert operation
Status _applyInsert(OperationContext* opCtx,
const repl::OplogEntryOrGroupedInserts& opOrGroupedInserts);
// Applies an update operation
Status _applyUpdate(OperationContext* opCtx,
const repl::OplogEntryOrGroupedInserts& opOrGroupedInserts);
// Applies a delete operation
Status _applyDelete(OperationContext* opCtx,
const repl::OplogEntryOrGroupedInserts& opOrGroupedInserts);
// Takes db and collection locks in MODE_IX for 'nss' and then applies an op by calling
// 'applyOpFn'. 'nss' must either be '_outputNss' or '_stashNss'.
Status _getCollectionAndApplyOp(
OperationContext* opCtx,
const NamespaceString& nss,
unique_function<Status(OperationContext*, Database*, const AutoGetCollection&)> applyOpFn);
// Takes db and collection locks in MODE_IS for 'nss' and queries the collection using
// 'idQuery'.
BSONObj _queryCollForId(OperationContext* opCtx,
const NamespaceString& nss,
const BSONObj& idQuery);
// Namespace where operations should be applied, unless there is an _id conflict.
const NamespaceString _outputNss;
// Namespace where operations are applied if there is an _id conflict.
const NamespaceString _stashNss;
// ShardId of the donor shard that the operations being applied originate from.
const ShardId _donorShardId;
// The chunk manager for the source namespace and original shard key.
const ChunkManager _sourceChunkMgr;
};
} // namespace mongo
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