Method on_container_start

cpp/examples/connection_options.cpp:50–54

    main_handler(const std::string& u) : url(u) {}

    void on_container_start(proton::container &c) override {
        // Connection options for this connection.  Merged with and overriding the container's
        // client_connection_options() settings.
        c.connect(url, connection_options().handler(conn_handler).max_frame_size(2468));
    }

    void on_connection_open(proton::connection &c) override {
        std::cout << "unexpected connection event on main handler" << std::endl;