mirror of https://gitee.com/bigwinds/arangodb
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_STORAGE_ENGINE_ENGINE_SELECTOR_FEATURE_H
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#define ARANGODB_STORAGE_ENGINE_ENGINE_SELECTOR_FEATURE_H 1
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#include "ApplicationFeatures/ApplicationFeature.h"
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#include "ProgramOptions/ProgramOptions.h"
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namespace arangodb {
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class StorageEngine;
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class EngineSelectorFeature final : public application_features::ApplicationFeature {
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public:
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explicit EngineSelectorFeature(application_features::ApplicationServer& server);
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void collectOptions(std::shared_ptr<options::ProgramOptions>) override final;
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void prepare() override final;
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void start() override final;
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void unprepare() override final;
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// return the names of all available storage engines
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static std::unordered_set<std::string> availableEngineNames();
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// return all available storage engines
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static std::unordered_map<std::string, std::string> availableEngines();
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// whether the engine has been started yet
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bool hasStarted() const { return _hasStarted.load(); }
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static std::string const& engineName();
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static std::string const& defaultEngine();
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static bool isMMFiles();
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static bool isRocksDB();
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// selected storage engine. this will contain a pointer to the storage engine
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// after prepare() and before unprepare()
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static StorageEngine* ENGINE;
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private:
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std::string _engine;
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std::string _engineFilePath;
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std::atomic<bool> _hasStarted;
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};
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} // namespace arangodb
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#endif
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