change-2-zipkin_random.ex

change-2-zipkin_random.ex

defmodule ZipkinRandom do

...

  def hello do
    OpenTelemetry.Tracer.start_span("span_name_1")

    Process.sleep(100)
    
    second_event(200)
    
    OpenTelemetry.Tracer.end_span()
  end

  def second_event(delay) do
    OpenTelemetry.Tracer.start_span("second_event_span")
    # again mimicing the same stuff
    Process.sleep(delay)

    OpenTelemetry.Tracer.end_span()

    "world slept for #{delay}ms"
  end

  end