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/**
* Copyright (C) 2021-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 <vector>
#include "mongo/db/repl/data_replicator_external_state.h"
#include "mongo/db/repl/initial_syncer_interface.h"
#include "mongo/db/repl/replication_process.h"
#include "mongo/db/repl/storage_interface.h"
#include "mongo/util/concurrency/thread_pool.h"
#include "mongo/util/string_map.h"
namespace mongo {
namespace repl {
/**
* An object factory for creating InitialSyncer instances via calling registered builders.
*/
class InitialSyncerFactory {
InitialSyncerFactory(const InitialSyncerFactory&) = delete;
InitialSyncerFactory& operator=(const InitialSyncerFactory&) = delete;
public:
InitialSyncerFactory() = default;
~InitialSyncerFactory() = default;
/**
* Returns a pointer to the initial syncer factory defined within the specified ServiceContext.
*/
static InitialSyncerFactory* get(ServiceContext* svcCtx);
/**
* Registers the new initial syncer factory within the specified ServiceContext.
*/
static void set(ServiceContext* svcCtx,
std::unique_ptr<InitialSyncerFactory> newInitialSyncerFactory);
using CreateInitialSyncerFunction = std::function<std::shared_ptr<InitialSyncerInterface>(
InitialSyncerInterface::Options opts,
std::unique_ptr<DataReplicatorExternalState> dataReplicatorExternalState,
ThreadPool* writerPool,
StorageInterface* storage,
ReplicationProcess* replicationProcess,
const InitialSyncerInterface::OnCompletionFn& onCompletion)>;
using InitialSyncCrashRecoveryFunction = std::function<void()>;
/**
* Make an InitialSyncer if the initialSyncMethod is "logical", or a FileCopyBasedInitialSyncer
* if the initialSyncMethod is "fileCopyBased".
*/
StatusWith<std::shared_ptr<InitialSyncerInterface>> makeInitialSyncer(
const std::string& initialSyncMethod,
InitialSyncerInterface::Options opts,
std::unique_ptr<DataReplicatorExternalState> dataReplicatorExternalState,
ThreadPool* writerPool,
StorageInterface* storage,
ReplicationProcess* replicationProcess,
const InitialSyncerInterface::OnCompletionFn& onCompletion);
/**
* Runs crash recovery for every registered initial syncer type that requires it.
*/
void runCrashRecovery();
/**
* Add a function that creates an initial syncer using the given initialSyncMethod to the
* _createInitialSyncerFunctionMap.
*/
void registerInitialSyncer(const std::string& initialSyncMethod,
CreateInitialSyncerFunction createInitialSyncerFunction,
InitialSyncCrashRecoveryFunction crashRecoveryFunction =
InitialSyncCrashRecoveryFunction());
private:
StringMap<CreateInitialSyncerFunction> _createInitialSyncerFunctionMap;
std::vector<InitialSyncCrashRecoveryFunction> _crashRecoveryFunctions;
};
} // namespace repl
} // namespace mongo
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