(*
   TODO: more options from
   https://opentelemetry.io/docs/reference/specification/protocol/exporter/
   *)

val get_url : unit -> string

val set_url : string -> unit
(** Url of the endpoint. Default is "http://localhost:4318",
    or "OTEL_EXPORTER_OTLP_ENDPOINT" if set. *)

val get_headers : unit -> (string * string) list

val set_headers : (string * string) list -> unit
(** Set http headers that are sent on every http query to the collector. *)

module Atomic = Opentelemetry_atomic.Atomic
module Config = Config

val create_backend :
  ?stop:bool Atomic.t ->
  ?config:Config.t ->
  unit ->
  (module Opentelemetry.Collector.BACKEND)

val setup :
  ?stop:bool Atomic.t -> ?config:Config.t -> ?enable:bool -> unit -> unit
(** Setup endpoint. This modifies {!Opentelemetry.Collector.backend}.
    @param enable actually setup the backend (default true). This can
      be used to enable/disable the setup depending on CLI arguments
      or environment.
    @param config configuration to use
    @param stop an atomic boolean. When it becomes true, background threads
    will all stop after a little while.
*)

val with_setup :
  ?stop:bool Atomic.t ->
  ?config:Config.t ->
  ?enable:bool ->
  unit ->
  (unit -> 'a) ->
  'a
(** [with_setup () f] is like [setup(); f()] but takes care of cleaning up
    after [f()] returns
    See {!setup} for more details. *)