Struct DetachedSpan 

pub struct DetachedSpan { /* private fields */ }

A span for async work, which may resume on another thread: it’s Send, takes its parent from the context current where it starts, and is never on the thread-local stack (so spans can’t nest under it implicitly — use DetachedSpan::enter for synchronous work that should). rws uses it for database queries and the async HTTP client.

Implementations

impl DetachedSpan

pub fn set_attribute(&mut self, key: &str, value: impl Into<AttributeValue>)

pub fn record_error(&mut self, message: &str)

Mark the span failed with an error.message.

pub fn enter<T>(&self, work: impl FnOnce() -> T) -> T

Run work with this span current on this thread (for header propagation or synchronous children).

pub fn end(self)

Trait Implementations

impl Drop for DetachedSpan

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.