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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 "mongo/base/checked_cast.h"
#include "mongo/db/repl/base_cloner.h"
#include "mongo/db/repl/initial_sync_shared_data.h"
namespace mongo {
namespace repl {
class InitialSyncBaseCloner : public BaseCloner {
public:
InitialSyncBaseCloner(StringData clonerName,
InitialSyncSharedData* sharedData,
const HostAndPort& source,
DBClientConnection* client,
StorageInterface* storageInterface,
ThreadPool* dbPool);
virtual ~InitialSyncBaseCloner() = default;
protected:
InitialSyncSharedData* getSharedData() const final {
return checked_cast<InitialSyncSharedData*>(BaseCloner::getSharedData());
}
private:
/**
* Make sure the initial sync ID on the sync source has not changed. Throws an exception
* if it has. Returns a not-OK status if a network error occurs.
*/
Status checkInitialSyncIdIsUnchanged();
/**
* Make sure the rollback ID has not changed. Throws an exception if it has. Returns
* a not-OK status if a network error occurs.
*/
Status checkRollBackIdIsUnchanged();
/**
* Does validity checks on the sync source. If the sync source is now no longer usable,
* throws an exception. Returns a not-OK status if a network error occurs or if the sync
* source is temporarily unusable (e.g. restarting).
*/
Status checkSyncSourceIsStillValid();
/**
* Clears _retryableOp.
*/
void clearRetryingState() final;
/**
* Checks to see if we are still within our allowed outage duration.
* Also probes the sync source for clone-fatal conditions, such as rollback.
*/
void handleStageAttemptFailed(BaseClonerStage* stage, Status lastError);
/**
* Allows the initial sync fuzzer to pause cloner execution at specific points.
*/
void pauseForFuzzer(BaseClonerStage* stage) final;
/**
* Provides part of a log message for the initial sync describing the namespace the
* cloner is operating on. It must start with the database name, followed by the
* string ' db: { ', followed by the stage name, followed by ': ' and the collection UUID
* if known.
*/
virtual std::string describeForFuzzer(BaseClonerStage*) const = 0;
/**
* Overriden to allow the BaseCloner to use the initial sync log component.
*/
virtual logv2::LogComponent getLogComponent() final;
// Operation that may currently be retrying.
InitialSyncSharedData::RetryableOperation _retryableOp;
};
} // namespace repl
} // namespace mongo
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