Struct opentelemetry::api::trace::NoopTracer

pub struct NoopTracer { /* fields omitted */ }

A no-op instance of a Tracer.

Implementations

impl NoopTracer

pub fn new() -> Self

Create a new no-op tracer

Trait Implementations

impl Debug for NoopTracer

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

Formats the value using the given formatter.

impl Default for NoopTracer

fn default() -> NoopTracer

Returns the "default value" for a type.

impl Tracer for NoopTracer

type Span = NoopSpan

The Span type used by this Tracer.

fn invalid(&self) -> Self::Span

Returns a NoopSpan as they are always invalid.

fn start_from_context(&self, name: &str, cx: &Context) -> Self::Span

Starts a new NoopSpan in a given context.

If the context contains a valid span context, it is progagated.

fn span_builder(&self, name: &str) -> SpanBuilder

Starts a SpanBuilder.

fn build_with_context(&self, builder: SpanBuilder, cx: &Context) -> Self::Span

Builds a NoopSpan from a SpanBuilder.

If the span builder or context contains a valid span context, it is progagated.

fn start(&self, name: &str) -> Self::Span

Starts a new Span.

fn build(&self, builder: SpanBuilder) -> Self::Span

Create a span from a SpanBuilder

#[must_use = "Dropping the guard detaches the context."]fn mark_span_as_active(&self, span: Self::Span) -> ContextGuard

Mark a given Span as active.

fn get_active_span<F, T>(&self, f: F) -> T where
    F: FnOnce(&dyn Span) -> T,
    Self: Sized, 

Executes a closure with a reference to this thread's current span.

fn in_span<T, F>(&self, name: &'static str, f: F) -> T where
    F: FnOnce(Context) -> T,
    Self::Span: Send + Sync, 

Start a new span and execute the given closure with reference to the span's context.

fn with_span<T, F>(&self, span: Self::Span, f: F) -> T where
    F: FnOnce(Context) -> T,
    Self::Span: Send + Sync, 

Start a new span and execute the given closure with reference to the span's context.