mirror of https://gitee.com/bigwinds/arangodb
135 lines
4.0 KiB
C++
135 lines
4.0 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_LISTEN_TASK_H
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#define ARANGOD_SCHEDULER_LISTEN_TASK_H 1
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#include "Basics/Common.h"
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#ifdef TRI_HAVE_LINUX_SOCKETS
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#include <netdb.h>
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#endif
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#ifdef TRI_HAVE_WINSOCK2_H
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#endif
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#include "Scheduler/Task.h"
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#include "Basics/Mutex.h"
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#include "Basics/socket-utils.h"
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#include "Rest/ConnectionInfo.h"
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#include "Rest/Endpoint.h"
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namespace arangodb {
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namespace rest {
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////////////////////////////////////////////////////////////////////////////////
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/// @ingroup Scheduler
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/// @brief task used to establish connections
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////////////////////////////////////////////////////////////////////////////////
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class ListenTask : virtual public Task {
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief maximal number of failed connects
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//////////////////////////////////////////////////////////////////////////////
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static size_t const MAX_ACCEPT_ERRORS = 128;
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief listen to given endpoint
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//////////////////////////////////////////////////////////////////////////////
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explicit ListenTask(Endpoint*);
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public:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief checks if listen socket is bound
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//////////////////////////////////////////////////////////////////////////////
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bool isBound() const;
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//////////////////////////////////////////////////////////////////////////////
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/// @brief return the endpoint
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//////////////////////////////////////////////////////////////////////////////
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Endpoint* endpoint() const { return _endpoint; }
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protected:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief called by the task to indicate connection success
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//////////////////////////////////////////////////////////////////////////////
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virtual bool handleConnected(TRI_socket_t socket,
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ConnectionInfo const& info) = 0;
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protected:
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//////////////////////////////////////////////////////////////////////////////
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/// @brief destructs a listen task
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///
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/// This method will close the underlying socket.
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//////////////////////////////////////////////////////////////////////////////
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~ListenTask();
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protected:
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//////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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///
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/// Note that registerTask must only be called when the socket is bound.
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//////////////////////////////////////////////////////////////////////////////
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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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//////////////////////////////////////////////////////////////////////////////
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/// @brief event for read
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//////////////////////////////////////////////////////////////////////////////
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EventToken _readWatcher;
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private:
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bool bindSocket();
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private:
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Endpoint* _endpoint;
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TRI_socket_t _listenSocket;
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size_t _acceptFailures;
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mutable Mutex _changeLock;
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};
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}
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}
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#endif
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