Struct TraceContext 

pub struct TraceContext {
    pub trace_id: String,
    pub span_id: Option<String>,
}

Distributed tracing context for correlating messages across service boundaries.

Wire format

{"trace_id":"0123456789abcdef0123456789abcdef","span_id":"0123456789abcdef"}

• trace_id: 32 lowercase hex characters (128-bit identifier)
• span_id: 16 lowercase hex characters (64-bit identifier), omitted when absent

Fields

trace_id: String

128-bit trace identifier encoded as 32 lowercase hex characters.

span_id: Option<String>

64-bit span identifier encoded as 16 lowercase hex characters. None when no parent span is active.

Implementations

impl TraceContext

pub fn generate() -> Self

Generate a new trace context with a random trace ID and no span ID.

The trace ID is a 128-bit random value formatted as 32 lowercase hex characters (UUID v4 without hyphens).

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() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TraceContext

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for TraceContext

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

Formats the value using the given formatter.

impl Eq for TraceContext

impl PartialEq for TraceContext

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

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

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 TraceContext

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for TraceContext

impl WireValidate for TraceContext

fn wire_validate(&self) -> Result<(), WireValidationError>

Validate that all fields are within wire protocol size limits.