Enum Sampler

pub enum Sampler {
    AlwaysOn,
    AlwaysOff,
    ParentBased(Box<Sampler>),
    TraceIdRatioBased(f64),
}

Available on crate feature trace only.

Sampling options

Variants

AlwaysOn

Always sample the trace

AlwaysOff

Never sample the trace

ParentBased(Box<Sampler>)

Respects the parent span’s sampling decision or delegates a delegate sampler for root spans.

TraceIdRatioBased(f64)

Sample a given fraction of traces. Fractions >= 1 will always sample. If the parent span is sampled, then it’s child spans will automatically be sampled. Fractions < 0 are treated as zero, but spans may still be sampled if their parent is.

Trait Implementations

impl Clone for Sampler

fn clone(&self) -> Sampler

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Sampler

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Sampler

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Sampler

fn eq(&self, other: &Sampler) -> bool

Tests for self and other values to be equal, and is used by ==.

const fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Sampler

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ShouldSample for Sampler

fn should_sample( &self, parent_context: Option<&Context>, trace_id: TraceId, name: &str, span_kind: &SpanKind, attributes: &[KeyValue], links: &[Link], instrumentation_library: &InstrumentationLibrary, ) -> SamplingResult

Returns the SamplingDecision for a Span to be created.

impl StructuralPartialEq for Sampler