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126 lines
4.0 KiB
C++
126 lines
4.0 KiB
C++
/*
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Copyright (c) 2007-2016 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __STREAM_CONNECTER_BASE_HPP_INCLUDED__
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#define __STREAM_CONNECTER_BASE_HPP_INCLUDED__
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#include "fd.hpp"
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#include "own.hpp"
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#include "io_object.hpp"
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namespace zmq
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{
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class io_thread_t;
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class session_base_t;
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struct address_t;
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class stream_connecter_base_t : public own_t, public io_object_t
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{
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public:
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// If 'delayed_start' is true connecter first waits for a while,
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// then starts connection process.
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stream_connecter_base_t (zmq::io_thread_t *io_thread_,
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zmq::session_base_t *session_,
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const options_t &options_,
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address_t *addr_,
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bool delayed_start_);
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~stream_connecter_base_t () ZMQ_OVERRIDE;
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protected:
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// Handlers for incoming commands.
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void process_plug () ZMQ_FINAL;
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void process_term (int linger_) ZMQ_OVERRIDE;
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// Handlers for I/O events.
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void in_event () ZMQ_OVERRIDE;
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void timer_event (int id_) ZMQ_OVERRIDE;
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// Internal function to create the engine after connection was established.
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virtual void create_engine (fd_t fd, const std::string &local_address_);
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// Internal function to add a reconnect timer
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void add_reconnect_timer ();
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// Removes the handle from the poller.
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void rm_handle ();
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// Close the connecting socket.
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void close ();
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// Address to connect to. Owned by session_base_t.
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// It is non-const since some parts may change during opening.
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address_t *const _addr;
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// Underlying socket.
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fd_t _s;
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// Handle corresponding to the listening socket, if file descriptor is
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// registered with the poller, or NULL.
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handle_t _handle;
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// String representation of endpoint to connect to
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std::string _endpoint;
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// Socket
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zmq::socket_base_t *const _socket;
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private:
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// ID of the timer used to delay the reconnection.
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enum
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{
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reconnect_timer_id = 1
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};
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// Internal function to return a reconnect backoff delay.
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// Will modify the current_reconnect_ivl used for next call
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// Returns the currently used interval
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int get_new_reconnect_ivl ();
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virtual void start_connecting () = 0;
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// If true, connecter is waiting a while before trying to connect.
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const bool _delayed_start;
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// True iff a timer has been started.
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bool _reconnect_timer_started;
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// Current reconnect ivl, updated for backoff strategy
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int _current_reconnect_ivl;
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ZMQ_NON_COPYABLE_NOR_MOVABLE (stream_connecter_base_t)
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protected:
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// Reference to the session we belong to.
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zmq::session_base_t *const _session;
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};
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}
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#endif
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