Span_ctx (opentelemetry.Opentelemetry_core.Span

type t

module Flags = Trace_flags

val make : 
  ?trace_state:string ->
  trace_flags:Trace_flags.t ->
  trace_id:Trace_id.t ->
  parent_id:Span_id.t ->
  unit ->
  t

parameter trace_flags
W3C trace flags. They must reflect the trace's actual sampling decision and trace ID randomness, so there is no default. Since 0.92

val dummy : t

Invalid span context, to be used as a placeholder

val is_valid : t -> bool

Are the span ID and trace ID valid (ie non-zero)?

val trace_id : t -> Trace_id.t

val parent_id : t -> Span_id.t

val trace_flags : t -> Trace_flags.t

W3C trace flags.

val sampled : t -> bool

Trace_flags.is_sampled (trace_flags self)

val trace_state : t -> string

W3C tracestate value, "" if absent.

val to_w3c_trace_context : t -> bytes

val of_w3c_trace_context : bytes -> (t, string) result

val of_w3c_trace_context_exn : bytes -> t

val k_ambient : t Hmap.key

Hmap key to carry around a Span_ctx.t, e.g. to remember what the current parent span is.