mirror of https://gitee.com/bigwinds/arangodb
81 lines
2.4 KiB
C++
81 lines
2.4 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 Jan Steemann
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_REST_SERVER_FLUSH_FEATURE_H
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#define ARANGODB_REST_SERVER_FLUSH_FEATURE_H 1
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#include "ApplicationFeatures/ApplicationFeature.h"
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#include "Basics/ReadWriteLock.h"
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namespace arangodb {
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class FlushThread;
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class FlushTransaction;
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class FlushFeature final
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: public application_features::ApplicationFeature {
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public:
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typedef std::unique_ptr<
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FlushTransaction, std::function<void(FlushTransaction*)>
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> FlushTransactionPtr;
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typedef std::function<FlushTransactionPtr()> FlushCallback;
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explicit FlushFeature(
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application_features::ApplicationServer& server
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);
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void collectOptions(
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std::shared_ptr<options::ProgramOptions> options) override;
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void validateOptions(std::shared_ptr<options::ProgramOptions>) override;
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void prepare() override;
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void start() override;
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void beginShutdown() override;
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void stop() override;
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void unprepare() override;
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static bool isRunning() { return _isRunning.load(); }
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/// @brief register the callback, using ptr as key
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void registerCallback(void* ptr, FlushFeature::FlushCallback const& cb);
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/// @brief unregister the callback, by ptr
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/// if the callback is unknown, returns false.
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bool unregisterCallback(void* ptr);
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/// @brief executes all callbacks. the order in which they are executed is undefined
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void executeCallbacks();
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private:
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uint64_t _flushInterval;
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std::unique_ptr<FlushThread> _flushThread;
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static std::atomic<bool> _isRunning;
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basics::ReadWriteLock _threadLock;
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basics::ReadWriteLock _callbacksLock;
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std::unordered_map<void*, FlushCallback> _callbacks;
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};
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}
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#endif
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