* Author: Robert Nagy, ronag89@gmail.com
*/
-#include "..\stdafx.h"
+#include "../StdAfx.h"
#include "AsyncEventServer.h"
#include <string>
#include <set>
#include <memory>
+#include <functional>
#include <boost/asio.hpp>
-#include <boost/thread.hpp>
#include <boost/lexical_cast.hpp>
-#include <tbb\mutex.h>
-#include <tbb\concurrent_hash_map.h>
+#include <tbb/mutex.h>
+#include <tbb/concurrent_hash_map.h>
+#include <tbb/concurrent_queue.h>
using boost::asio::ip::tcp;
class connection : public spl::enable_shared_from_this<connection>
{
typedef tbb::concurrent_hash_map<std::wstring, std::shared_ptr<void>> lifecycle_map_type;
+ typedef tbb::concurrent_queue<std::string> send_queue;
const spl::shared_ptr<tcp::socket> socket_;
- boost::asio::io_service& service_;
+ std::shared_ptr<boost::asio::io_service> service_;
+ const std::wstring listen_port_;
const spl::shared_ptr<connection_set> connection_set_;
- const std::wstring name_;
protocol_strategy_factory<char>::ptr protocol_factory_;
std::shared_ptr<protocol_strategy<char>> protocol_;
std::array<char, 32768> data_;
- //std::map<std::wstring, std::shared_ptr<void>> lifecycle_bound_objects_;
- lifecycle_map_type lifecycle_bound_objects_;
+ lifecycle_map_type lifecycle_bound_objects_;
+ send_queue send_queue_;
+ bool is_writing_;
class connection_holder : public client_connection<char>
{
std::weak_ptr<connection> connection_;
public:
- explicit connection_holder(std::weak_ptr<connection> conn) : connection_(conn)
+ explicit connection_holder(std::weak_ptr<connection> conn) : connection_(std::move(conn))
{}
- virtual void send(std::basic_string<char>&& data)
+ void send(std::basic_string<char>&& data) override
{
- //TODO: need to implement a send-queue
auto conn = connection_.lock();
- conn->send(std::move(data));
+
+ if (conn)
+ conn->send(std::move(data));
}
- virtual void disconnect()
+
+ void disconnect() override
{
auto conn = connection_.lock();
- conn->disconnect();
+
+ if (conn)
+ conn->disconnect();
}
- virtual std::wstring print() const
+
+ std::wstring address() const override
{
auto conn = connection_.lock();
- return conn->print();
+
+ if (conn)
+ return conn->ipv4_address();
+ else
+ return L"[destroyed-connection]";
}
- virtual void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void>& lifecycle_bound)
+ void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void>& lifecycle_bound) override
{
auto conn = connection_.lock();
- return conn->add_lifecycle_bound_object(key, lifecycle_bound);
+
+ if (conn)
+ return conn->add_lifecycle_bound_object(key, lifecycle_bound);
}
- virtual std::shared_ptr<void> remove_lifecycle_bound_object(const std::wstring& key)
+
+ std::shared_ptr<void> remove_lifecycle_bound_object(const std::wstring& key) override
{
auto conn = connection_.lock();
- return conn->remove_lifecycle_bound_object(key);
+
+ if (conn)
+ return conn->remove_lifecycle_bound_object(key);
+ else
+ return std::shared_ptr<void>();
}
};
public:
- 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)
+ static spl::shared_ptr<connection> create(std::shared_ptr<boost::asio::io_service> service, spl::shared_ptr<tcp::socket> socket, const protocol_strategy_factory<char>::ptr& protocol, spl::shared_ptr<connection_set> connection_set)
{
- spl::shared_ptr<connection> con(new connection(std::move(socket), std::move(protocol), std::move(connection_set)));
+ spl::shared_ptr<connection> con(new connection(std::move(service), std::move(socket), std::move(protocol), std::move(connection_set)));
+ con->init();
con->read_some();
return con;
}
+ void init()
+ {
+ protocol_ = protocol_factory_->create(spl::make_shared<connection_holder>(shared_from_this()));
+ }
+
~connection()
{
- CASPAR_LOG(info) << print() << L" connection destroyed.";
+ CASPAR_LOG(debug) << print() << L" connection destroyed.";
}
std::wstring print() const
{
- return L"[" + name_ + L"]";
+ return L"async_event_server[:" + listen_port_ + L"]";
+ }
+
+ std::wstring address() const
+ {
+ return u16(socket_->local_endpoint().address().to_string());
}
- virtual void send(std::string&& data)
+ std::wstring ipv4_address() const
{
- write_some(std::move(data));
+ return socket_->is_open() ? u16(socket_->remote_endpoint().address().to_string()) : L"no-address";
}
- virtual void disconnect()
+ void send(std::string&& data)
{
- service_.dispatch([=] { stop(); });
+ send_queue_.push(std::move(data));
+ auto self = shared_from_this();
+ service_->dispatch([=] { self->do_write(); });
}
- void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void> lifecycle_bound)
+ void disconnect()
+ {
+ auto self = shared_from_this();
+ service_->dispatch([=] { self->stop(); });
+ }
+
+ void add_lifecycle_bound_object(const std::wstring& key, const std::shared_ptr<void>& lifecycle_bound)
{
//thread-safe tbb_concurrent_hash_map
lifecycle_bound_objects_.insert(std::pair<std::wstring, std::shared_ptr<void>>(key, lifecycle_bound));
return std::shared_ptr<void>();
}
- /**************/
private:
- void stop()
+ void do_write() //always called from the asio-service-thread
+ {
+ if(!is_writing_)
+ {
+ std::string data;
+ if(send_queue_.try_pop(data))
+ {
+ write_some(std::move(data));
+ }
+ }
+ }
+
+ void stop() //always called from the asio-service-thread
{
connection_set_->erase(shared_from_this());
+
+ CASPAR_LOG(info) << print() << L" Client " << ipv4_address() << L" disconnected (" << connection_set_->size() << L" connections).";
+
try
{
+ socket_->cancel();
socket_->close();
}
catch(...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
}
-
- CASPAR_LOG(info) << print() << L" Disconnected.";
- }
-
- const std::string ipv4_address() const
- {
- return socket_->is_open() ? socket_->local_endpoint().address().to_string() : "no-address";
}
- connection(const spl::shared_ptr<tcp::socket>& socket, const protocol_strategy_factory<char>::ptr& protocol_factory, const spl::shared_ptr<connection_set>& connection_set)
+ connection(const std::shared_ptr<boost::asio::io_service>& service, const spl::shared_ptr<tcp::socket>& socket, const protocol_strategy_factory<char>::ptr& protocol_factory, const spl::shared_ptr<connection_set>& connection_set)
: socket_(socket)
- , service_(socket->get_io_service())
- , name_((socket_->is_open() ? u16(socket_->local_endpoint().address().to_string() + ":" + boost::lexical_cast<std::string>(socket_->local_endpoint().port())) : L"no-address"))
+ , service_(service)
+ , listen_port_(socket_->is_open() ? boost::lexical_cast<std::wstring>(socket_->local_endpoint().port()) : L"no-port")
, connection_set_(connection_set)
, protocol_factory_(protocol_factory)
+ , is_writing_(false)
{
- CASPAR_LOG(info) << print() << L" Connected.";
+ CASPAR_LOG(info) << print() << L" Accepted connection from " << ipv4_address() << L" (" << (connection_set_->size() + 1) << L" connections).";
}
-
- protocol_strategy<char>& protocol()
- {
- if (!protocol_)
- protocol_ = protocol_factory_->create(spl::make_shared<connection_holder>(shared_from_this()));
-
- return *protocol_;
- }
- void handle_read(const boost::system::error_code& error, size_t bytes_transferred)
+ void handle_read(const boost::system::error_code& error, size_t bytes_transferred) //always called from the asio-service-thread
{
if(!error)
{
{
std::string data(data_.begin(), data_.begin() + bytes_transferred);
- CASPAR_LOG(trace) << print() << L" Received: " << u16(data);
-
- protocol().parse(data);
+ protocol_->parse(data);
}
catch(...)
{
stop();
}
- void handle_write(const spl::shared_ptr<std::string>& data, const boost::system::error_code& error, size_t bytes_transferred)
+ 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
{
if(!error)
{
- CASPAR_LOG(trace) << print() << L" Sent: " << (data->size() < 512 ? u16(*data) : L"more than 512 bytes.");
+ if(bytes_transferred != str->size())
+ {
+ str->assign(str->substr(bytes_transferred));
+ 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));
+ }
+ else
+ {
+ is_writing_ = false;
+ do_write();
+ }
}
- else if (error != boost::asio::error::operation_aborted)
+ else if (error != boost::asio::error::operation_aborted && socket_->is_open())
stop();
}
- void read_some()
+ void read_some() //always called from the asio-service-thread
{
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));
}
- void write_some(std::string&& data)
+ void write_some(std::string&& data) //always called from the asio-service-thread
{
+ is_writing_ = true;
auto str = spl::make_shared<std::string>(std::move(data));
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));
}
friend struct AsyncEventServer::implementation;
};
-struct AsyncEventServer::implementation
+struct AsyncEventServer::implementation : public spl::enable_shared_from_this<implementation>
{
- boost::asio::io_service service_;
- tcp::acceptor acceptor_;
- protocol_strategy_factory<char>::ptr protocol_factory_;
- spl::shared_ptr<connection_set> connection_set_;
- boost::thread thread_;
- std::vector<lifecycle_factory_t> lifecycle_factories_;
- tbb::mutex mutex_;
-
- implementation(const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
- : acceptor_(service_, tcp::endpoint(tcp::v4(), port))
+ std::shared_ptr<boost::asio::io_service> service_;
+ tcp::acceptor acceptor_;
+ protocol_strategy_factory<char>::ptr protocol_factory_;
+ spl::shared_ptr<connection_set> connection_set_;
+ std::vector<lifecycle_factory_t> lifecycle_factories_;
+ tbb::mutex mutex_;
+
+ implementation(std::shared_ptr<boost::asio::io_service> service, const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
+ : service_(std::move(service))
+ , acceptor_(*service_, tcp::endpoint(tcp::v4(), port))
, protocol_factory_(protocol)
- , thread_(std::bind(&boost::asio::io_service::run, &service_))
{
- start_accept();
}
- ~implementation()
+ void stop()
{
try
{
- acceptor_.close();
+ acceptor_.cancel();
+ acceptor_.close();
}
- catch(...)
+ catch (...)
{
CASPAR_LOG_CURRENT_EXCEPTION();
}
+ }
+
+ ~implementation()
+ {
+ auto conns_set = connection_set_;
- service_.post([=]
+ service_->post([conns_set]
{
- auto connections = *connection_set_;
- BOOST_FOREACH(auto& connection, connections)
- connection->stop();
+ auto connections = *conns_set;
+ for (auto& connection : connections)
+ connection->stop();
});
-
- thread_.join();
}
- void start_accept()
+ void start_accept()
{
- spl::shared_ptr<tcp::socket> socket(new tcp::socket(service_));
- acceptor_.async_accept(*socket, std::bind(&implementation::handle_accept, this, socket, std::placeholders::_1));
+ spl::shared_ptr<tcp::socket> socket(new tcp::socket(*service_));
+ acceptor_.async_accept(*socket, std::bind(&implementation::handle_accept, shared_from_this(), socket, std::placeholders::_1));
}
void handle_accept(const spl::shared_ptr<tcp::socket>& socket, const boost::system::error_code& error)
if (!error)
{
- auto conn = connection::create(socket, protocol_factory_, connection_set_);
+ boost::system::error_code ec;
+ socket->set_option(boost::asio::socket_base::keep_alive(true), ec);
+
+ if (ec)
+ CASPAR_LOG(warning) << print() << L" Failed to enable TCP keep-alive on socket";
+
+ auto conn = connection::create(service_, socket, protocol_factory_, connection_set_);
connection_set_->insert(conn);
- BOOST_FOREACH(auto& lifecycle_factory, lifecycle_factories_)
+ for (auto& lifecycle_factory : lifecycle_factories_)
{
- auto lifecycle_bound = lifecycle_factory(conn->ipv4_address());
+ auto lifecycle_bound = lifecycle_factory(u8(conn->ipv4_address()));
conn->add_lifecycle_bound_object(lifecycle_bound.first, lifecycle_bound.second);
}
}
start_accept();
}
+ std::wstring print() const
+ {
+ return L"async_event_server[:" + boost::lexical_cast<std::wstring>(acceptor_.local_endpoint().port()) + L"]";
+ }
+
void add_client_lifecycle_object_factory(const lifecycle_factory_t& factory)
{
- service_.post([=]{ lifecycle_factories_.push_back(factory); });
+ auto self = shared_from_this();
+ service_->post([=]{ self->lifecycle_factories_.push_back(factory); });
}
};
AsyncEventServer::AsyncEventServer(
- const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
- : impl_(new implementation(protocol, port)) {}
+ std::shared_ptr<boost::asio::io_service> service, const protocol_strategy_factory<char>::ptr& protocol, unsigned short port)
+ : impl_(new implementation(std::move(service), protocol, port))
+{
+ impl_->start_accept();
+}
+
+AsyncEventServer::~AsyncEventServer()
+{
+ impl_->stop();
+}
-AsyncEventServer::~AsyncEventServer() {}
void AsyncEventServer::add_client_lifecycle_object_factory(const lifecycle_factory_t& factory) { impl_->add_client_lifecycle_object_factory(factory); }
-}}
\ No newline at end of file
+}}
projects / casparcg / blobdiff