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2d957cd46f
Summary: resolves T12767 Reviewers: ivica Reviewed By: ivica Subscribers: miljen Tags: #spacetime Maniphest Tasks: T12767 Differential Revision: https://repo.mireo.local/D25970
101 lines
2.5 KiB
C++
101 lines
2.5 KiB
C++
#ifndef ASYNC_MQTT5_WRITE_OP_HPP
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#define ASYNC_MQTT5_WRITE_OP_HPP
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#include <boost/asio/prepend.hpp>
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#include <boost/asio/write.hpp>
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#include <boost/asio/dispatch.hpp>
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#include <async_mqtt5/detail/internal_types.hpp>
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#include <async_mqtt5/detail/async_traits.hpp>
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namespace async_mqtt5::detail {
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template <typename Owner, typename Handler>
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class write_op {
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struct on_write_locked {};
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struct on_write {};
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struct on_reconnect {};
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Owner& _owner;
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std::decay_t<Handler> _handler;
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public:
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write_op(
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Owner& owner, Handler&& handler) :
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_owner(owner),
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_handler(std::forward<Handler>(handler))
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{}
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write_op(write_op&&) noexcept = default;
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write_op(const write_op&) = delete;
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using executor_type = typename Owner::executor_type;
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executor_type get_executor() const noexcept {
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return _owner.get_executor();
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}
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using allocator_type = asio::associated_allocator_t<Handler>;
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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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template <typename BufferType>
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void perform(BufferType& buffer) {
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auto stream_ptr = _owner._stream_ptr;
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if (_owner.was_connected())
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// note: write operation should not be time-limited
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detail::async_write(
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*stream_ptr, buffer,
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asio::prepend(std::move(*this), on_write {}, stream_ptr)
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);
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else
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(*this)(on_write {}, stream_ptr, asio::error::not_connected, 0);
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}
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void operator()(
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on_write, typename Owner::stream_ptr stream_ptr,
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error_code ec, size_t bytes_written
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) {
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if (!_owner.is_open())
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return complete(asio::error::operation_aborted, 0);
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if (!ec)
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return complete(ec, bytes_written);
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// websocket returns operation_aborted if disconnected
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if (should_reconnect(ec) || ec == asio::error::operation_aborted)
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return _owner.async_reconnect(
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stream_ptr, asio::prepend(std::move(*this), on_reconnect {})
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);
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return complete(asio::error::no_recovery, 0);
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}
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void operator()(on_reconnect, error_code ec) {
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if ((ec == asio::error::operation_aborted && _owner.is_open()) || !ec)
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ec = asio::error::try_again;
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return complete(ec, 0);
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}
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private:
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void complete(error_code ec, size_t bytes_written) {
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asio::dispatch(
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get_executor(),
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asio::prepend(std::move(_handler), ec, bytes_written)
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);
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}
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static bool should_reconnect(error_code ec) {
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using namespace asio::error;
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return ec == connection_aborted || ec == not_connected
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|| ec == timed_out || ec == connection_reset
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|| ec == broken_pipe || ec == asio::error::eof;
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}
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};
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} // end namespace async_mqtt5::detail
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#endif // !ASYNC_MQTT5_WRITE_OP_HPP
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