75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
/*
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Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef CONNECTION_ACCEPTOR_INCLUDED
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#define CONNECTION_ACCEPTOR_INCLUDED
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#include "sql/conn_handler/channel_info.h" // Channel_info
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#include "sql/conn_handler/connection_handler_manager.h" // Connection_handler_manager
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/**
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This class presents a generic interface to initialize and run
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a connection event loop for different types of listeners and
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a callback functor to call on the connection event from the
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listener that listens for connection. Listener type should
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be a class providing methods setup_listener, listen_for_
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connection_event and close_listener. The Connection event
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callback functor object would on receiving connection event
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from the client to process the connection.
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*/
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template <typename Listener>
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class Connection_acceptor {
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Listener *m_listener;
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public:
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Connection_acceptor(Listener *listener) : m_listener(listener) {}
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~Connection_acceptor() { delete m_listener; }
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/**
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Initialize a connection acceptor.
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@retval return true if initialization failed, else false.
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*/
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bool init_connection_acceptor() { return m_listener->setup_listener(); }
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/**
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Connection acceptor loop to accept connections from clients.
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*/
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void connection_event_loop() {
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Connection_handler_manager *mgr =
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Connection_handler_manager::get_instance();
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while (!connection_events_loop_aborted()) {
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Channel_info *channel_info = m_listener->listen_for_connection_event();
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if (channel_info != NULL) mgr->process_new_connection(channel_info);
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}
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}
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/**
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Close the listener.
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*/
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void close_listener() { m_listener->close_listener(); }
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};
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#endif // CONNECTION_ACCEPTOR_INCLUDED
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