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4cbae1056b
Summary: related to T13767 Reviewers: ivica Reviewed By: ivica Subscribers: iljazovic, miljen Differential Revision: https://repo.mireo.local/D31700
136 lines
3.3 KiB
C++
136 lines
3.3 KiB
C++
//
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// Copyright (c) 2023-2024 Ivica Siladic, Bruno Iljazovic, Korina Simicevic
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASYNC_MQTT5_PING_OP_HPP
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#define ASYNC_MQTT5_PING_OP_HPP
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#include <limits>
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#include <chrono>
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#include <memory>
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#include <boost/asio/cancellation_state.hpp>
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#include <boost/asio/consign.hpp>
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#include <boost/asio/prepend.hpp>
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#include <boost/asio/recycling_allocator.hpp>
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#include <boost/asio/steady_timer.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/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 <typename ClientService, typename Executor>
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class ping_op {
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public:
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using executor_type = Executor;
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private:
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using client_service = ClientService;
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struct on_timer {};
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struct on_pingreq {};
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std::shared_ptr<client_service> _svc_ptr;
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executor_type _executor;
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std::unique_ptr<asio::steady_timer> _ping_timer;
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asio::cancellation_state _cancellation_state;
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public:
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ping_op(
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std::shared_ptr<client_service> svc_ptr,
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executor_type ex
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) :
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_svc_ptr(std::move(svc_ptr)), _executor(ex),
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_ping_timer(new asio::steady_timer(_svc_ptr->get_executor())),
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_cancellation_state(
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_svc_ptr->_cancel_ping.slot(),
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asio::enable_total_cancellation {},
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asio::enable_total_cancellation {}
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)
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{}
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ping_op(ping_op&&) noexcept = default;
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ping_op(const ping_op&) = delete;
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ping_op& operator=(ping_op&&) noexcept = default;
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ping_op& operator=(const ping_op&) = delete;
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using allocator_type = asio::recycling_allocator<void>;
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allocator_type get_allocator() const noexcept {
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return allocator_type {};
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}
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using cancellation_slot_type = asio::cancellation_slot;
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cancellation_slot_type get_cancellation_slot() const noexcept {
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return _cancellation_state.slot();
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}
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executor_type get_executor() const noexcept {
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return _executor;
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}
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void perform() {
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_ping_timer->expires_after(compute_wait_time());
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_ping_timer->async_wait(
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asio::prepend(std::move(*this), on_timer {})
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);
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}
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void operator()(on_timer, error_code) {
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if (
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_cancellation_state.cancelled() == asio::cancellation_type::terminal ||
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!_svc_ptr->is_open()
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)
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return;
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else if (_cancellation_state.cancelled() == asio::cancellation_type::total) {
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_cancellation_state.clear();
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return perform();
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}
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auto pingreq = control_packet<allocator_type>::of(
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no_pid, get_allocator(), encoders::encode_pingreq
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);
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auto wire_data = pingreq.wire_data();
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_svc_ptr->async_send(
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wire_data,
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no_serial, send_flag::none,
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asio::consign(
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asio::prepend(std::move(*this), on_pingreq {}),
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std::move(pingreq)
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)
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);
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}
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void operator()(on_pingreq, error_code ec) {
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if (
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_cancellation_state.cancelled() == asio::cancellation_type::terminal ||
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ec == asio::error::no_recovery
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)
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return;
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_cancellation_state.clear();
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perform();
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}
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private:
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duration compute_wait_time() const {
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auto negotiated_ka = _svc_ptr->negotiated_keep_alive();
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return negotiated_ka ?
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std::chrono::seconds(negotiated_ka) :
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duration(std::numeric_limits<duration::rep>::max());
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}
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};
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} // end namespace async_mqtt5::detail
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#endif // !ASYNC_MQTT5_PING_OP_HPP
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