2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
4 * This file is part of CasparCG (www.casparcg.com).
6 * CasparCG is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * CasparCG is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
19 * Author: Robert Nagy, ronag89@gmail.com
22 #include "..\stdafx.h"
24 #include "AsyncEventServer.h"
33 #include <boost/asio.hpp>
34 #include <boost/thread.hpp>
35 #include <boost/lexical_cast.hpp>
37 #include <tbb\mutex.h>
38 #include <tbb\concurrent_hash_map.h>
39 #include <tbb\concurrent_queue.h>
41 using boost::asio::ip::tcp;
43 namespace caspar { namespace IO {
47 typedef std::set<spl::shared_ptr<connection>> connection_set;
49 class connection : public spl::enable_shared_from_this<connection>
51 typedef tbb::concurrent_hash_map<std::wstring, std::shared_ptr<void>> lifecycle_map_type;
52 typedef tbb::concurrent_queue<std::string> send_queue;
54 const spl::shared_ptr<tcp::socket> socket_;
55 boost::asio::io_service& service_;
56 const spl::shared_ptr<connection_set> connection_set_;
57 const std::wstring name_;
58 protocol_strategy_factory<char>::ptr protocol_factory_;
59 std::shared_ptr<protocol_strategy<char>> protocol_;
61 std::array<char, 32768> data_;
62 lifecycle_map_type lifecycle_bound_objects_;
63 send_queue send_queue_;
66 class connection_holder : public client_connection<char>
68 std::weak_ptr<connection> connection_;
70 explicit connection_holder(std::weak_ptr<connection> conn) : connection_(std::move(conn))
73 virtual void send(std::basic_string<char>&& data)
75 auto conn = connection_.lock();
78 conn->send(std::move(data));
81 virtual void disconnect()
83 auto conn = connection_.lock();
89 virtual std::wstring print() const
91 auto conn = connection_.lock();
96 return L"[destroyed-connection]";
99 virtual void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void>& lifecycle_bound)
101 auto conn = connection_.lock();
104 return conn->add_lifecycle_bound_object(key, lifecycle_bound);
106 virtual std::shared_ptr<void> remove_lifecycle_bound_object(const std::wstring& key)
108 auto conn = connection_.lock();
111 return conn->remove_lifecycle_bound_object(key);
113 return std::shared_ptr<void>();
118 static spl::shared_ptr<connection> create(spl::shared_ptr<tcp::socket> socket, const protocol_strategy_factory<char>::ptr& protocol, spl::shared_ptr<connection_set> connection_set)
120 spl::shared_ptr<connection> con(new connection(std::move(socket), std::move(protocol), std::move(connection_set)));
127 CASPAR_LOG(info) << print() << L" connection destroyed.";
130 std::wstring print() const
132 return L"[" + name_ + L"]";
135 virtual void send(std::string&& data)
137 send_queue_.push(std::move(data));
138 service_.dispatch([=] { do_write(); });
141 virtual void disconnect()
143 service_.dispatch([=] { stop(); });
146 void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void>& lifecycle_bound)
148 //thread-safe tbb_concurrent_hash_map
149 lifecycle_bound_objects_.insert(std::pair<std::wstring, std::shared_ptr<void>>(key, lifecycle_bound));
151 std::shared_ptr<void> remove_lifecycle_bound_object(const std::wstring& key)
153 //thread-safe tbb_concurrent_hash_map
154 lifecycle_map_type::const_accessor acc;
155 if(lifecycle_bound_objects_.find(acc, key))
157 auto result = acc->second;
158 lifecycle_bound_objects_.erase(acc);
161 return std::shared_ptr<void>();
166 void do_write() //always called from the asio-service-thread
171 if(send_queue_.try_pop(data))
173 write_some(std::move(data));
178 void stop() //always called from the asio-service-thread
180 connection_set_->erase(shared_from_this());
187 CASPAR_LOG_CURRENT_EXCEPTION();
190 CASPAR_LOG(info) << print() << L" Disconnected.";
193 const std::string ipv4_address() const
195 return socket_->is_open() ? socket_->local_endpoint().address().to_string() : "no-address";
198 connection(const spl::shared_ptr<tcp::socket>& socket, const protocol_strategy_factory<char>::ptr& protocol_factory, const spl::shared_ptr<connection_set>& connection_set)
200 , service_(socket->get_io_service())
201 , name_((socket_->is_open() ? u16(socket_->local_endpoint().address().to_string() + ":" + boost::lexical_cast<std::string>(socket_->local_endpoint().port())) : L"no-address"))
202 , connection_set_(connection_set)
203 , protocol_factory_(protocol_factory)
206 CASPAR_LOG(info) << print() << L" Connected.";
209 protocol_strategy<char>& protocol() //always called from the asio-service-thread
212 protocol_ = protocol_factory_->create(spl::make_shared<connection_holder>(shared_from_this()));
217 void handle_read(const boost::system::error_code& error, size_t bytes_transferred) //always called from the asio-service-thread
223 std::string data(data_.begin(), data_.begin() + bytes_transferred);
225 CASPAR_LOG(trace) << print() << L" Received: " << u16(data);
227 protocol().parse(data);
231 CASPAR_LOG_CURRENT_EXCEPTION();
236 else if (error != boost::asio::error::operation_aborted)
240 void handle_write(const spl::shared_ptr<std::string>& str, const boost::system::error_code& error, size_t bytes_transferred) //always called from the asio-service-thread
244 CASPAR_LOG(trace) << print() << L" Sent: " << (str->size() < 512 ? u16(*str) : L"more than 512 bytes.");
245 if(bytes_transferred != str->size())
247 str->assign(str->substr(bytes_transferred));
248 socket_->async_write_some(boost::asio::buffer(str->data(), str->size()), std::bind(&connection::handle_write, shared_from_this(), str, std::placeholders::_1, std::placeholders::_2));
256 else if (error != boost::asio::error::operation_aborted)
260 void read_some() //always called from the asio-service-thread
262 socket_->async_read_some(boost::asio::buffer(data_.data(), data_.size()), std::bind(&connection::handle_read, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
265 void write_some(std::string&& data) //always called from the asio-service-thread
268 auto str = spl::make_shared<std::string>(std::move(data));
269 socket_->async_write_some(boost::asio::buffer(str->data(), str->size()), std::bind(&connection::handle_write, shared_from_this(), str, std::placeholders::_1, std::placeholders::_2));
272 friend struct AsyncEventServer::implementation;
275 struct AsyncEventServer::implementation
277 boost::asio::io_service service_;
278 tcp::acceptor acceptor_;
279 protocol_strategy_factory<char>::ptr protocol_factory_;
280 spl::shared_ptr<connection_set> connection_set_;
281 boost::thread thread_;
282 std::vector<lifecycle_factory_t> lifecycle_factories_;
285 implementation(const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
286 : acceptor_(service_, tcp::endpoint(tcp::v4(), port))
287 , protocol_factory_(protocol)
288 , thread_([&] { service_.run(); })
301 CASPAR_LOG_CURRENT_EXCEPTION();
306 auto connections = *connection_set_;
307 BOOST_FOREACH(auto& connection, connections)
316 spl::shared_ptr<tcp::socket> socket(new tcp::socket(service_));
317 acceptor_.async_accept(*socket, std::bind(&implementation::handle_accept, this, socket, std::placeholders::_1));
320 void handle_accept(const spl::shared_ptr<tcp::socket>& socket, const boost::system::error_code& error)
322 if (!acceptor_.is_open())
327 auto conn = connection::create(socket, protocol_factory_, connection_set_);
328 connection_set_->insert(conn);
330 BOOST_FOREACH(auto& lifecycle_factory, lifecycle_factories_)
332 auto lifecycle_bound = lifecycle_factory(conn->ipv4_address());
333 conn->add_lifecycle_bound_object(lifecycle_bound.first, lifecycle_bound.second);
339 void add_client_lifecycle_object_factory(const lifecycle_factory_t& factory)
341 service_.post([=]{ lifecycle_factories_.push_back(factory); });
345 AsyncEventServer::AsyncEventServer(
346 const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
347 : impl_(new implementation(protocol, port)) {}
349 AsyncEventServer::~AsyncEventServer() {}
350 void AsyncEventServer::add_client_lifecycle_object_factory(const lifecycle_factory_t& factory) { impl_->add_client_lifecycle_object_factory(factory); }