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/**
* Copyright (C) 2018-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
/**
* copy a database (export/import basically)
*/
#include <string>
#include <vector>
#include "mongo/client/connpool.h"
#include "mongo/client/dbclient_base.h"
namespace mongo {
class DBClientBase;
class NamespaceString;
class OperationContext;
// TODO SERVER-75657: Create an interface for the Cloner.
class Cloner {
Cloner(const Cloner&) = delete;
Cloner& operator=(const Cloner&) = delete;
public:
Cloner();
virtual ~Cloner() {}
/**
* Copies an entire database from the specified host.
* clonedColls: the function will return with this populated with a list of the collections that
* were cloned.
* collectionsToClone: When opts.createCollections is false, this list reflects the collections
* that are cloned. When opts.createCollections is true, this parameter is
* ignored and the collection list is fetched from the remote via _conn.
*/
virtual Status copyDb(OperationContext* opCtx,
const std::string& dBName,
const std::string& masterHost,
const std::vector<NamespaceString>& shardedColls,
std::set<std::string>* clonedColls);
virtual Status setupConn(OperationContext* opCtx,
const std::string& dBName,
const std::string& masterHost);
virtual StatusWith<std::vector<BSONObj>> getListOfCollections(OperationContext* opCtx,
const std::string& dBName,
const std::string& masterHost);
protected:
std::unique_ptr<ScopedDbConnection> _conn;
// Filters a database's collection list and removes collections that should not be cloned.
StatusWith<std::vector<BSONObj>> _filterCollectionsForClone(
const std::string& fromDBName, const std::list<BSONObj>& initialCollections);
struct CreateCollectionParams {
std::string collectionName;
BSONObj collectionInfo;
BSONObj idIndexSpec;
bool shardedColl = false;
};
// Executes 'createCollection' for each collection described in 'createCollectionParams', in
// 'dbName'.
Status _createCollectionsForDb(
OperationContext* opCtx,
const std::vector<CreateCollectionParams>& createCollectionParams,
const std::string& dbName);
/*
* Returns the _id index spec from 'indexSpecs', or an empty BSONObj if none is found.
*/
static BSONObj _getIdIndexSpec(const std::list<BSONObj>& indexSpecs);
void _copy(OperationContext* opCtx,
const std::string& toDBName,
const NamespaceString& nss,
const BSONObj& from_opts,
const BSONObj& from_id_index);
void _copyIndexes(OperationContext* opCtx,
const std::string& toDBName,
const NamespaceString& nss,
const BSONObj& from_opts,
const std::list<BSONObj>& from_indexes);
struct BatchHandler;
DBClientBase* getConn() {
return _conn->get();
}
};
} // namespace mongo
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