Struct NoHandler 

pub struct NoHandler;

Type-level “no callback” sentinel.

Pass Handlers::NONE (which is None::<&Handler<NoHandler>>) to any callback-accepting method to leave that callback unset. NoHandler implements every generated callback trait, so the method’s callback generic is inferred as NoHandler without a per-callback helper or turbofish — including methods with several callback parameters (e.g. async_add_subscription’s image handlers). Its callback methods are unreachable: the C side is handed a null callback + null clientd, so they can never fire.

Trait Implementations

impl AeronAgentCloseFuncCallback for NoHandler

fn handle_aeron_agent_on_close_func(&mut self)

impl AeronAgentDoWorkFuncCallback for NoHandler

fn handle_aeron_agent_do_work_func(&mut self) -> c_int

impl AeronAgentStartFuncCallback for NoHandler

fn handle_aeron_agent_on_start_func(&mut self, role_name: &str)

impl AeronAvailableCounterCallback for NoHandler

fn handle_aeron_on_available_counter( &mut self, counters_reader: AeronCountersReader, registration_id: i64, counter_id: i32, )

impl AeronAvailableImageCallback for NoHandler

fn handle_aeron_on_available_image( &mut self, subscription: AeronSubscription, image: AeronImage, )

impl AeronBlockHandlerCallback for NoHandler

fn handle_aeron_block_handler( &mut self, buffer: &[u8], session_id: i32, term_id: i32, )

impl AeronCloseClientCallback for NoHandler

fn handle_aeron_on_close_client(&mut self)

impl AeronControlledFragmentHandlerCallback for NoHandler

fn handle_aeron_controlled_fragment_handler( &mut self, buffer: &[u8], header: AeronHeader, ) -> aeron_controlled_fragment_handler_action_t

impl AeronCountersReaderForeachCounterFuncCallback for NoHandler

fn handle_aeron_counters_reader_foreach_counter_func( &mut self, value: i64, id: i32, type_id: i32, key: &[u8], label: &str, )

impl AeronErrorHandlerCallback for NoHandler

fn handle_aeron_error_handler(&mut self, errcode: c_int, message: &str)

impl AeronErrorLogReaderFuncCallback for NoHandler

fn handle_aeron_error_log_reader_func( &mut self, observation_count: i32, first_observation_timestamp: i64, last_observation_timestamp: i64, error: &str, )

impl AeronFprintfHandlerCallback for NoHandler

fn handle_aeron_fprintf_handler( &mut self, arg1: &str, arg2: u64, arg4: &str, arg5: *mut c_char, ) -> c_int

impl AeronFragmentHandlerCallback for NoHandler

fn handle_aeron_fragment_handler(&mut self, buffer: &[u8], header: AeronHeader)

impl AeronIdleStrategyFuncCallback for NoHandler

fn handle_aeron_idle_strategy_func(&mut self, work_count: c_int)

impl AeronLossReporterReadEntryFuncCallback for NoHandler

fn handle_aeron_loss_reporter_read_entry_func( &mut self, observation_count: i64, total_bytes_lost: i64, first_observation_timestamp: i64, last_observation_timestamp: i64, session_id: i32, stream_id: i32, channel: &str, source: &str, )

impl AeronNewPublicationCallback for NoHandler

fn handle_aeron_on_new_publication( &mut self, channel: &str, stream_id: i32, session_id: i32, correlation_id: i64, )

impl AeronNewSubscriptionCallback for NoHandler

fn handle_aeron_on_new_subscription( &mut self, channel: &str, stream_id: i32, correlation_id: i64, )

impl AeronNotificationCallback for NoHandler

fn handle_aeron_notification(&mut self)

impl AeronPublicationErrorFrameHandlerCallback for NoHandler

fn handle_aeron_publication_error_frame_handler( &mut self, error_frame: AeronPublicationErrorValues, )

impl AeronReservedValueSupplierCallback for NoHandler

fn handle_aeron_reserved_value_supplier(&mut self, buffer: &mut [u8]) -> i64

impl AeronStrToPtrHashMapForEachFuncCallback for NoHandler

fn handle_aeron_str_to_ptr_hash_map_for_each_func( &mut self, key: &str, value: *mut c_void, )

impl AeronUnavailableCounterCallback for NoHandler

fn handle_aeron_on_unavailable_counter( &mut self, counters_reader: AeronCountersReader, registration_id: i64, counter_id: i32, )

impl AeronUnavailableImageCallback for NoHandler

fn handle_aeron_on_unavailable_image( &mut self, subscription: AeronSubscription, image: AeronImage, )

impl AeronUriParseCallbackCallback for NoHandler

fn handle_aeron_uri_parse_callback(&mut self, key: &str, value: &str) -> c_int