Struct TraceContext 

pub struct TraceContext {
    pub trace_id: String,
    pub span_id: String,
    pub trace_flags: u8,
    pub trace_state: String,
}

A parsed traceparent (plus the unparsed tracestate).

Producers set the headers at enqueue; the runtime parses traceparent at DISPATCH and hands the result to the handler and to the telemetry facade. See parse_traceparent for what “lenient” means here.

Fields

trace_id: String

32 lowercase hex characters, never all zero.

span_id: String

16 lowercase hex characters, never all zero. The PARENT span id: a job span created from this context is a child of it.

trace_flags: u8

The 8 trace-flags bits. Bit 0 is sampled.

trace_state: String

Verbatim tracestate, empty when absent. Never parsed.

Implementations

impl TraceContext

pub const fn sampled(&self) -> bool

W3C’s sampled flag (bit 0 of trace-flags).

pub fn to_traceparent(&self) -> String

Re-render the traceparent header value. Round-trips parse_traceparent exactly, so a runtime that re-injects the context into a downstream call emits the same bytes the producer sent.

Trait Implementations

impl Clone for TraceContext

fn clone(&self) -> TraceContext

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TraceContext

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

Formats the value using the given formatter.

impl Default for TraceContext

fn default() -> TraceContext

Returns the “default value” for a type.

impl Eq for TraceContext

impl PartialEq for TraceContext

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TraceContext