//---------------------------------------------------------------------------- // Hi all, // I have a program like below. // Two questions: // 1. The program can process multi connections, each connection is a // session that has some states. The program should catch signal SIGINT // and SIGTERM, then each session should do different actions according to // their state. But how to do this? Does it have to have a connection // manager? // // 2. When the function Server::handle_accept is called, a SessionController // object will be created. The constructor of SessionController will apply for // some resource, if failed, the constructor would throw an exception. // So, if there is an exception thrown, what should we do? I don't want to // exit the process, may be the resource will be available after some seconds, // then I hope the program continue to accept new connections. //---------------------------------------------------------------------------- class SessionController; typedef shared_ptr<SessionController> SessionController_Ptr; Server::Server(boost::asio::io_service& io_service) : io_service_(io_service), acceptor_(io_service, tcp::endpoint( boost::asio::ip::address::from_string("0.0.0.0"), 10001)) { SessionController_Ptr new_connection(new SessionController(io_service_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&Server::handle_accept, this, new_connection, boost::asio::placeholders::error)); } //---------------------------------------------------------------------------- void Server::handle_accept(SessionController_Ptr new_connection, const boost::system::error_code& error) { if (!error) { new_connection->start(); try { new_connection.reset(new SessionController(io_service_)); acceptor_.async_accept(new_connection->socket(), boost::bind(&Server::handle_accept, this, new_connection, boost::asio::placeholders::error)); } catch (...) { // What should we do? } } }