mirror of https://gitee.com/bigwinds/arangodb
144 lines
4.3 KiB
C++
144 lines
4.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief tasks used to establish connections
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2012 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 triAGENS 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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/// @author Copyright 2009-2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_SCHEDULER_LISTEN_TASK_H
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#define TRIAGENS_SCHEDULER_LISTEN_TASK_H 1
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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 "Rest/ConnectionInfo.h"
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#include "Rest/Endpoint.h"
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namespace triagens {
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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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ListenTask (Endpoint*, bool);
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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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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 (socket_t fd, 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);
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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void cleanup ();
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////////////////////////////////////////////////////////////////////////////////
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/// {@inheritDoc}
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////////////////////////////////////////////////////////////////////////////////
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bool handleEvent (EventToken token, EventType);
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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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bool reuseAddress;
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Endpoint* _endpoint;
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socket_t listenSocket;
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size_t acceptFailures;
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mutable basics::Mutex changeLock;
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};
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}
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}
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#endif
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