Struct NullStore 

pub struct NullStore;

A TraceStore that discards every span and event. Lets integrators compile tracing in but disable it at runtime (init_custom(Arc::new(NullStore))) without their own cfg shims.

Trait Implementations

impl Clone for NullStore

fn clone(&self) -> NullStore

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for NullStore

impl Debug for NullStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for NullStore

fn default() -> NullStore

Returns the “default value” for a type.

impl TraceStore for NullStore

fn record_span<'life0, 'async_trait>( &'life0 self, _span: SpanRecord, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, NullStore: 'async_trait,

fn record_event<'life0, 'async_trait>( &'life0 self, _event: EventRecord, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, Self: 'async_trait,

Record an intra-span event. Defaults to a no-op so existing stores keep compiling; stores that support events override this.