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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 <vector>
#include "mongo/db/repl/base_cloner.h"
#include "mongo/db/repl/tenant_base_cloner.h"
#include "mongo/db/repl/tenant_database_cloner.h"
#include "mongo/db/repl/tenant_migration_shared_data.h"
namespace mongo {
namespace repl {
class TenantAllDatabaseCloner final : public TenantBaseCloner {
public:
struct Stats {
size_t databasesToClone{0};
size_t databasesCloned{0};
size_t databasesClonedBeforeFailover{0};
std::vector<TenantDatabaseCloner::Stats> databaseStats;
Date_t start;
long long approxTotalDataSize{0};
long long approxTotalBytesCopied{0};
std::string toString() const;
BSONObj toBSON() const;
void append(BSONObjBuilder* builder) const;
};
TenantAllDatabaseCloner(TenantMigrationSharedData* sharedData,
const HostAndPort& source,
DBClientConnection* client,
StorageInterface* storageInterface,
ThreadPool* dbPool,
StringData tenantId);
virtual ~TenantAllDatabaseCloner() = default;
Stats getStats() const;
std::string toString() const;
Timestamp getOperationTime_forTest();
protected:
ClonerStages getStages() final;
private:
friend class TenantAllDatabaseClonerTest;
class TenantAllDatabaseClonerStage : public ClonerStage<TenantAllDatabaseCloner> {
public:
TenantAllDatabaseClonerStage(std::string name,
TenantAllDatabaseCloner* cloner,
ClonerRunFn stageFunc)
: ClonerStage<TenantAllDatabaseCloner>(name, cloner, stageFunc) {}
bool isTransientError(const Status& status) override {
// Always abort on error.
return false;
}
};
/**
* Stage function that retrieves database information from the donor.
*/
AfterStageBehavior listDatabasesStage();
/**
* Stage function that retrieves information locally on the recipient for databases that are
* already cloned.
*/
AfterStageBehavior listExistingDatabasesStage();
/**
* Stage function that initializes several stats before carrying on to the 'postStage'.
*/
AfterStageBehavior initializeStatsStage();
/**
* The preStage sets the start time in _stats.
*/
void preStage() final;
/**
*
* The postStage creates and runs the individual TenantDatabaseCloners on each database found on
* the sync source.
*/
void postStage() final;
// 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 classes 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.
std::vector<std::string> _databases; // (X)
std::unique_ptr<TenantDatabaseCloner> _currentDatabaseCloner; // (MX)
// The database name prefix of the tenant associated with this migration.
std::string _tenantId; // (R)
TenantAllDatabaseClonerStage _listDatabasesStage; // (R)
TenantAllDatabaseClonerStage _listExistingDatabasesStage; // (R)
TenantAllDatabaseClonerStage _initializeStatsStage; // (R)
// The operationTime returned with the listDatabases result.
Timestamp _operationTime; // (X)
Stats _stats; // (MX)
};
} // namespace repl
} // namespace mongo
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