Struct StdLogFieldsBuilder

pub struct StdLogFieldsBuilder<'a>(/* private fields */);

A specialized span log builder for the standard log fields.

Implementations

impl<'a> StdLogFieldsBuilder<'a>

pub fn event<T>(&mut self, event: T) -> &mut Self

where T: Into<Cow<'static, str>>,

Adds the field LogField::new("event", event).

event is a stable identifier for some notable moment in the lifetime of a Span. For instance, a mutex lock acquisition or release or the sorts of lifetime events in a browser page load described in the Performance.timing specification.

E.g., from Zipkin, "cs", "sr", "ss", or "cr". Or, more generally, "initialized" or "timed out".

pub fn message<T>(&mut self, message: T) -> &mut Self

where T: Into<Cow<'static, str>>,

Adds the field LogField::new("message", message).

message is a concise, human-readable, one-line message explaining the event.

E.g., "Could not connect to backend", "Cache invalidation succeeded"

pub fn stack(&mut self) -> &mut Self

Adds the field LogField::new("stack", {stack trace}).

Trait Implementations

impl<'a> Debug for StdLogFieldsBuilder<'a>

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

Formats the value using the given formatter.