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/**
* Copyright (C) 2019-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 <vector>
#include "mongo/db/repl/base_cloner.h"
#include "mongo/db/repl/collection_cloner.h"
#include "mongo/db/repl/initial_sync_base_cloner.h"
#include "mongo/db/repl/initial_sync_shared_data.h"
namespace mongo {
namespace repl {
class DatabaseCloner final : public InitialSyncBaseCloner {
public:
struct Stats {
DatabaseName dbname;
Date_t start;
Date_t end;
size_t collections{0};
size_t clonedCollections{0};
std::vector<CollectionCloner::Stats> collectionStats;
std::string toString() const;
BSONObj toBSON() const;
void append(BSONObjBuilder* builder) const;
};
DatabaseCloner(const DatabaseName& dbName,
InitialSyncSharedData* sharedData,
const HostAndPort& source,
DBClientConnection* client,
StorageInterface* storageInterface,
ThreadPool* dbPool);
virtual ~DatabaseCloner() = default;
Stats getStats() const;
std::string toString() const;
static CollectionOptions parseCollectionOptions(const BSONObj& element);
protected:
ClonerStages getStages() final;
bool isMyFailPoint(const BSONObj& data) const final;
private:
friend class DatabaseClonerTest;
/**
* Stage function that retrieves collection information from the sync source.
*/
AfterStageBehavior listCollectionsStage();
/**
* The preStage sets the start time in _stats.
*/
void preStage() final;
/**
* The postStage creates and runs the individual CollectionCloners on each database found on
* the sync source, and sets the end time in _stats when done.
*/
void postStage() final;
std::string describeForFuzzer(BaseClonerStage* stage) const final {
return _dbName.toStringWithTenantId() + " db: { " + stage->getName() + ": 1 } ";
}
// All member variables are labeled with one of the following codes indicating the
// synchronization rules for accessing them.
//
// (R) Read-only in concurrent operation; no synchronization required.
// (S) Self-synchronizing; access according to class's own rules.
// (M) Reads and writes guarded by _mutex (defined in base class).
// (X) Access only allowed from the main flow of control called from run() or constructor.
// (MX) Write access with mutex from main flow of control, read access with mutex from other
// threads, read access allowed from main flow without mutex.
const DatabaseName _dbName; // (R)
ClonerStage<DatabaseCloner> _listCollectionsStage; // (R)
std::vector<std::pair<NamespaceString, CollectionOptions>> _collections; // (X)
std::unique_ptr<CollectionCloner> _currentCollectionCloner; // (MX)
Stats _stats; // (MX)
};
} // namespace repl
} // namespace mongo
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