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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
#include <functional>
#include <map>
#include <memory>
#include <string>
#include "mongo/base/disallow_copying.h"
#include "mongo/client/connection_string.h"
#include "mongo/client/remote_command_targeter_factory.h"
#include "mongo/s/client/shard.h"
#include "mongo/stdx/functional.h"
namespace mongo {
/**
* An object factory for creating Shard instances via calling registered builders.
*/
class ShardFactory {
MONGO_DISALLOW_COPYING(ShardFactory);
public:
using BuilderCallable =
stdx::function<std::unique_ptr<Shard>(const ShardId&, const ConnectionString&)>;
using BuildersMap = std::map<ConnectionString::ConnectionType, BuilderCallable>;
ShardFactory(BuildersMap&&, std::unique_ptr<RemoteCommandTargeterFactory>);
~ShardFactory() = default;
/**
* Deprecated. Creates a unique_ptr with a new instance of a Shard with the provided shardId
* and connection string. This method is currently only used for addShard.
*/
std::unique_ptr<Shard> createUniqueShard(const ShardId& shardId,
const ConnectionString& connStr);
/**
* Creates a shared_ptr with a new instance of a Shard with the provided shardId
* and connection string.
*/
std::shared_ptr<Shard> createShard(const ShardId& shardId, const ConnectionString& connStr);
private:
// Map from ConnectionType to a function that can be used to build a Shard object for that
// ConnectionType. This map must be set up at the initialization of the ShardFactory instance.
BuildersMap _builders;
// Even though ShardFactory doesn't use _targeterFactory directly, the functions contained in
// _builders may, so ShardFactory must own _targeterFactory so that their lifetimes are tied
// together
std::unique_ptr<RemoteCommandTargeterFactory> _targeterFactory;
};
} // namespace mongo
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