mirror of https://gitee.com/bigwinds/arangodb
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS 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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/// @author Achim Brandt
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGOD_SCHEDULER_SOCKET_TASK_H
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#define ARANGOD_SCHEDULER_SOCKET_TASK_H 1
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#include "Scheduler/Task.h"
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#include "Basics/StringBuffer.h"
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#include "Basics/Thread.h"
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#include "Basics/socket-utils.h"
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#include "Statistics/StatisticsAgent.h"
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namespace arangodb {
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namespace rest {
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class SocketTask : virtual public Task, public ConnectionStatisticsAgent {
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explicit SocketTask(SocketTask const&) = delete;
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SocketTask& operator=(SocketTask const&) = delete;
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private:
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static size_t const READ_BLOCK_SIZE = 10000;
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public:
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SocketTask(TRI_socket_t, ConnectionInfo&&, double);
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protected:
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~SocketTask();
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public:
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void armKeepAliveTimeout();
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protected:
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virtual bool fillReadBuffer();
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virtual bool handleRead(); // called by handleEvent
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virtual bool handleWrite(); // called by handleEvent
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virtual void handleTimeout() = 0;
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// is called in a loop as long as it returns true.
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// Return false if there is not enough data to do
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// any more processing and all available data has
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// been evaluated.
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virtual bool processRead() = 0;
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protected:
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void addWriteBuffer(std::unique_ptr<basics::StringBuffer> buffer) {
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addWriteBuffer(std::move(buffer), (RequestStatisticsAgent*)nullptr);
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}
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void addWriteBuffer(std::unique_ptr<basics::StringBuffer>,
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RequestStatisticsAgent*);
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void addWriteBuffer(basics::StringBuffer*, TRI_request_statistics_t*);
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void completedWriteBuffer();
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protected:
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bool setup(Scheduler*, EventLoop) override;
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void cleanup() override;
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bool handleEvent(EventToken token, EventType) override;
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protected:
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double const _keepAliveTimeout;
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protected:
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// connection closed
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bool _closed = false;
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// client has closed the connection, immediately close the underlying socket
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bool _clientClosed = false;
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// the client has requested, close the connection after all data is written
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bool _closeRequested = false;
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protected:
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TRI_socket_t _commSocket;
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ConnectionInfo _connectionInfo;
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basics::StringBuffer _readBuffer;
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basics::StringBuffer* _writeBuffer = nullptr;
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TRI_request_statistics_t* _writeBufferStatistics = nullptr;
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std::deque<std::pair<basics::StringBuffer*, TRI_request_statistics_t*>> _writeBuffers;
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EventToken _keepAliveWatcher = nullptr;
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EventToken _readWatcher = nullptr;
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EventToken _writeWatcher = nullptr;
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size_t _writeLength = 0;
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TRI_tid_t _tid = 0;
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};
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}
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}
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#endif
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