Interface for message bus connections. More...

Public Types
using	fetch_handler = callable_ref< bool(message_id, message_age, const message_view &)>
	Alias for fetch handler callable reference type.

Public Member Functions
virtual auto	update () -> bool
	Updates the internal state of the connection (called repeatedly). More...

virtual void	cleanup ()
	Cleans up the connection before destroying it.

virtual auto	is_usable () -> bool
	Checks if the connection is in usable state.

virtual auto	max_data_size () -> valid_if_positive< span_size_t >
	Returns the maximum data block size in bytes that can be sent.

virtual auto	send (message_id msg_id, const message_view &) -> bool=0
	Sent a message with the specified id. More...

virtual auto	fetch_messages (fetch_handler handler) -> bool=0
	Fetch all enqueued messages that have been received since last fetch. More...

Public Member Functions inherited from eagine::msgbus::connection_info
virtual auto	kind () -> connection_kind=0
	Returns the connection kind.

virtual auto	addr_kind () -> connection_addr_kind=0
	Returns the connection address kind.

virtual auto	type_id () -> identifier=0
	Returns a description identifier of the implementation.

Public Member Functions inherited from eagine::interface< connection_info >
constexpr	interface (const interface &)=delete
	Not copyable.

auto	operator= (interface &&)=delete
	Not move assignable.

auto	operator= (const interface &)=delete
	Not copy assignable.

Additional Inherited Members
Protected Member Functions inherited from eagine::interface< connection_info >
constexpr	interface () noexcept=default
	Default constructible by derived.

constexpr	interface (interface &&) noexcept=default
	Move constructible by derived.