Struct NoopSpan

pub struct NoopSpan { /* private fields */ }

A no-op instance of a Span.

Implementations

impl NoopSpan

pub const DEFAULT: NoopSpan = _

The default NoopSpan, as a constant

Trait Implementations

impl Clone for NoopSpan

fn clone(&self) -> NoopSpan

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NoopSpan

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

Formats the value using the given formatter.

impl Span for NoopSpan

fn add_event<T>(&mut self, _name: T, _attributes: Vec<KeyValue>)

where T: Into<Cow<'static, str>>,

Ignores all events

fn add_event_with_timestamp<T>( &mut self, _name: T, _timestamp: SystemTime, _attributes: Vec<KeyValue>, )

where T: Into<Cow<'static, str>>,

Ignores all events with timestamps

fn span_context(&self) -> &SpanContext

Returns an invalid SpanContext.

fn is_recording(&self) -> bool

Returns false, signifying that this span is never recording.

fn set_attribute(&mut self, _attribute: KeyValue)

Ignores all attributes

fn set_status(&mut self, _status: Status)

Ignores status

fn update_name<T>(&mut self, _new_name: T)

where T: Into<Cow<'static, str>>,

Ignores name updates

fn end_with_timestamp(&mut self, _timestamp: SystemTime)

Ignores Span endings

fn add_link(&mut self, _span_context: SpanContext, _attributes: Vec<KeyValue>)

Adds Link to another SpanContext.

fn record_error(&mut self, err: &dyn Error)

Record an error as an event for this span.

fn set_attributes(&mut self, attributes: impl IntoIterator<Item = KeyValue>)

Set multiple attributes of this span.

fn end(&mut self)

Signals that the operation described by this span has now ended.