Struct BoxedTracer

pub struct BoxedTracer(/* private fields */);

Available on crate feature trace only.

Wraps the GlobalTracerProvider’s Tracer so it can be used generically by applications without knowing the underlying type.

Trait Implementations

impl Debug for BoxedTracer

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

Formats the value using the given formatter.

impl Tracer for BoxedTracer

type Span = BoxedSpan

Available on crate feature trace only.

Global tracer uses BoxedSpans so that it can be a global singleton, which is not possible if it takes generic type parameters.

fn start_with_context<T>(&self, name: T, parent_cx: &Context) -> Self::Span

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

Available on crate feature trace only.

Starts a new Span.

Each span has zero or one parent spans and zero or more child spans, which represent causally related operations. A tree of related spans comprises a trace. A span is said to be a root span if it does not have a parent. Each trace includes a single root span, which is the shared ancestor of all other spans in the trace.

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

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

Available on crate feature trace only.

Creates a span builder

An ergonomic way for attributes to be configured before the Span is started.

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

Available on crate feature trace only.

Create a span from a SpanBuilder

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

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

Available on crate feature trace only.

Starts a new Span.

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

Available on crate feature trace only.

Create a span from a SpanBuilder

fn in_span<T, F>(&self, name: &'static str, f: F) -> T

where F: FnOnce(Context) -> T, Self::Span: Send + Sync + 'static,

Available on crate feature trace only.

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 + 'static,

Available on crate feature trace only.

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