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e0a0bafbf1
Reviewers: ivica Reviewed By: ivica Subscribers: korina Differential Revision: https://repo.mireo.local/D26864
144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
#ifndef ASYNC_MQTT5_DISCONNECT_OP_HPP
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#define ASYNC_MQTT5_DISCONNECT_OP_HPP
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#include <boost/asio/consign.hpp>
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#include <boost/asio/dispatch.hpp>
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#include <boost/asio/prepend.hpp>
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#include <async_mqtt5/types.hpp>
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#include <async_mqtt5/detail/control_packet.hpp>
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#include <async_mqtt5/detail/internal_types.hpp>
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#include <async_mqtt5/detail/cancellable_handler.hpp>
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#include <async_mqtt5/impl/codecs/message_encoders.hpp>
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namespace async_mqtt5::detail {
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namespace asio = boost::asio;
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template <
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typename ClientService,
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typename DisconnectContext
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>
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class disconnect_op {
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using client_service = ClientService;
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struct on_disconnect {};
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std::shared_ptr<client_service> _svc_ptr;
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DisconnectContext _context;
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using handler_type = cancellable_handler<
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asio::any_completion_handler<void (error_code)>,
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typename ClientService::executor_type
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>;
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handler_type _handler;
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public:
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template <typename Handler>
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disconnect_op(
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const std::shared_ptr<client_service>& svc_ptr,
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DisconnectContext&& context, Handler&& handler
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) :
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_svc_ptr(svc_ptr),
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_context(std::move(context)),
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_handler(std::move(handler), get_executor())
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{}
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disconnect_op(disconnect_op&&) noexcept = default;
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disconnect_op(const disconnect_op&) = delete;
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using executor_type = typename client_service::executor_type;
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executor_type get_executor() const noexcept {
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return _svc_ptr->get_executor();
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}
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using allocator_type = asio::associated_allocator_t<handler_type>;
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allocator_type get_allocator() const noexcept {
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return asio::get_associated_allocator(_handler);
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}
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void perform() {
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auto disconnect = control_packet<allocator_type>::of(
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no_pid, get_allocator(),
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encoders::encode_disconnect,
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static_cast<uint8_t>(_context.reason_code), _context.props
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);
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asio::dispatch(asio::prepend(std::move(*this), std::move(disconnect)));
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}
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void operator()(control_packet<allocator_type> disconnect) {
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const auto& wire_data = disconnect.wire_data();
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_svc_ptr->async_send(
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wire_data,
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no_serial, send_flag::terminal,
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asio::consign(
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asio::prepend(std::move(*this), on_disconnect {}),
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std::move(disconnect)
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)
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);
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}
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void operator()(on_disconnect, error_code ec) {
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// The connection must be closed even
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// if we failed to send the DISCONNECT packet
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// with Reason Code of 0x80 or greater.
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if (
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ec == asio::error::operation_aborted ||
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ec == asio::error::no_recovery
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)
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return complete(asio::error::operation_aborted);
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if (_context.terminal) {
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_svc_ptr->cancel();
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return complete(error_code {});
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}
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if (ec == asio::error::try_again)
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return complete(error_code {});
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_svc_ptr->close_stream();
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_svc_ptr->open_stream();
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complete(error_code {});
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}
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private:
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void complete(error_code ec) {
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_handler.complete(ec);
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}
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};
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template <typename ClientService, typename CompletionToken>
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decltype(auto) async_disconnect(
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disconnect_rc_e reason_code, const disconnect_props& props,
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bool terminal, const std::shared_ptr<ClientService>& svc_ptr,
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CompletionToken&& token
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) {
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using Signature = void (error_code);
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auto initiation = [](
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auto handler, disconnect_ctx ctx,
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const std::shared_ptr<ClientService>& svc_ptr
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) {
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disconnect_op {
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svc_ptr, std::move(ctx), std::move(handler)
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}.perform();
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};
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return asio::async_initiate<CompletionToken, Signature>(
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initiation, token,
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disconnect_ctx { reason_code, props, terminal },
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svc_ptr
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);
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}
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} // end namespace async_mqtt5::detail
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#endif // !ASYNC_MQTT5_DISCONNECT_HPP
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