Struct NullSampler 

pub struct NullSampler;

This samples no traces.

Trait Implementations

impl Clone for NullSampler

fn clone(&self) -> NullSampler

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NullSampler

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

Formats the value using the given formatter.

impl<T> Sampler<T> for NullSampler

fn is_sampled(&self, _span: &CandidateSpan<'_, T>) -> bool

This method decides whether a trace with given span should be sampled.

fn or<U>(self, other: U) -> OrSampler<Self, U>

where Self: Sized, U: Sampler<T>,

Returns the sampler that samples a trace if self or other decides to sample it.

fn and<U>(self, other: U) -> AndSampler<Self, U>

where Self: Sized, U: Sampler<T>,

Returns the sampler that samples a trace if both of self and other decides to sample it.

fn boxed(self) -> BoxSampler<T>

where Self: Sized + Send + Sync + 'static,

Converts into BoxSampler.