Struct Span 

pub struct Span {
    pub id: SpanId,
    pub name: String,
    pub start_ns: u64,
    pub end_ns: Option<u64>,
    pub parent: Option<SpanId>,
    pub category: Option<String>,
    pub metadata: HashMap<String, String>,
}

A performance measurement span

Fields

id: SpanId

Unique identifier

name: String

Span name

start_ns: u64

Start timestamp (nanoseconds from trace start)

end_ns: Option<u64>

End timestamp (nanoseconds from trace start)

parent: Option<SpanId>

Parent span ID

category: Option<String>

Span category

metadata: HashMap<String, String>

Additional metadata

Implementations

impl Span

pub fn new(name: impl Into<String>, start_ns: u64) -> Self

Create a new span

pub fn with_parent(self, parent: SpanId) -> Self

Create span with parent

pub fn with_category(self, category: impl Into<String>) -> Self

Set category

pub fn add_metadata(&mut self, key: impl Into<String>, value: impl Into<String>)

Add metadata

pub fn close(&mut self, end_ns: u64)

Close the span

pub fn duration_ns(&self) -> Option<u64>

Get duration in nanoseconds

pub fn duration(&self) -> Option<Duration>

Get duration as Duration

pub fn is_closed(&self) -> bool

Check if span is closed

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.