Struct Span 

pub struct Span {
    pub span_id: u64,
    pub trace_id: u64,
    pub parent_id: u64,
    pub service: String,
    pub resource: String,
    pub name: String,
    pub start: i64,
    pub duration: i64,
    pub error: i32,
    pub meta: HashMap<String, String>,
    pub metrics: HashMap<String, f64>,
    pub span_type: Option<String>,
}

A single span in a distributed trace

Fields

span_id: u64

Span ID (unique identifier for this span)

trace_id: u64

Trace ID (shared across all spans in the trace)

parent_id: u64

Parent span ID (0 if root span)

service: String

Service name

resource: String

Resource name (e.g., endpoint, SQL query)

name: String

Operation name (e.g., “web.request”, “db.query”)

start: i64

Start timestamp (nanoseconds since epoch)

duration: i64

Duration in nanoseconds

error: i32

Error flag (0 = no error, 1 = error)

meta: HashMap<String, String>

Key-value metadata

metrics: HashMap<String, f64>

Numeric metadata

span_type: Option<String>

Span type (web, db, cache, etc.)

Trait Implementations

impl Clone for Span

fn clone(&self) -> Span

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Span

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Span

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for Span

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

where __S: Serializer,

Serialize this value into the given Serde serializer.