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/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* 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 GNU Affero General 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 <map>
#include "mongo/db/service_context.h"
namespace mongo {
class Client;
class StorageEngineLockFile;
class ServiceContextMongoD final : public ServiceContext {
public:
using FactoryMap = std::map<std::string, const StorageEngine::Factory*>;
ServiceContextMongoD();
~ServiceContextMongoD();
StorageEngine* getGlobalStorageEngine() override;
void createLockFile();
void initializeGlobalStorageEngine() override;
void shutdownGlobalStorageEngineCleanly() override;
void registerStorageEngine(const std::string& name,
const StorageEngine::Factory* factory) override;
bool isRegisteredStorageEngine(const std::string& name) override;
StorageFactoriesIterator* makeStorageFactoriesIterator() override;
private:
std::unique_ptr<OperationContext> _newOpCtx(Client* client, unsigned opId) override;
std::unique_ptr<StorageEngineLockFile> _lockFile;
// logically owned here, but never deleted by anyone.
StorageEngine* _storageEngine = nullptr;
// All possible storage engines are registered here through MONGO_INIT.
FactoryMap _storageFactories;
};
class StorageFactoriesIteratorMongoD final : public StorageFactoriesIterator {
public:
typedef ServiceContextMongoD::FactoryMap::const_iterator FactoryMapIterator;
StorageFactoriesIteratorMongoD(const FactoryMapIterator& begin, const FactoryMapIterator& end);
bool more() const override;
const StorageEngine::Factory* next() override;
private:
FactoryMapIterator _curr;
FactoryMapIterator _end;
};
} // namespace mongo
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