Use Tracing functions throughout modules more

Tracing has a few functions that cover the grounds of other functions
that are used. These can be altered to use Tracings own functions.

lib/tracing.ex

@@ -105,6 +105,13 @@ defmodule Tracing do
     |> extract()
   end
 
+  @doc """
+  Simple wrapper around `OpenTelemetry.Tracer.end_span/0`
+  """
+  def end_span() do
+    OpenTelemetry.Tracer.end_span()
+  end
+
   @doc """
   Helper function for propogating opentelemetry
   """

lib/tracing/monitor.ex

@@ -18,8 +18,8 @@ defmodule Tracing.Monitor do
   def handle_info({:DOWN, _ref, :process, pid, :normal}, state) do
     :ets.take(__MODULE__, pid)
     |> Enum.each(fn {_pid, ctx} ->
-      _span_ctx = OpenTelemetry.Tracer.set_current_span(ctx)
-      _ = OpenTelemetry.Tracer.end_span()
+      _span_ctx = Tracing.set_current_span(ctx)
+      _ = Tracing.end_span()
     end)
 
     {:noreply, state}
@@ -28,8 +28,8 @@ defmodule Tracing.Monitor do
   def handle_info({:DOWN, _ref, :process, pid, {:shutdown, _}}, state) do
     :ets.take(__MODULE__, pid)
     |> Enum.each(fn {_pid, ctx} ->
-      _span_ctx = OpenTelemetry.Tracer.set_current_span(ctx)
-      _ = OpenTelemetry.Tracer.end_span()
+      _span_ctx = Tracing.set_current_span(ctx)
+      _ = Tracing.end_span()
     end)
 
     {:noreply, state}
@@ -38,9 +38,9 @@ defmodule Tracing.Monitor do
   def handle_info({:DOWN, _ref, :process, pid, reason}, state) do
     :ets.take(__MODULE__, pid)
     |> Enum.each(fn {_pid, ctx} ->
-      _span_ctx = OpenTelemetry.Tracer.set_current_span(ctx)
-      _ = OpenTelemetry.Tracer.add_event("Process died", [{"reason", inspect(reason)}])
-      _ = OpenTelemetry.Tracer.end_span()
+      Tracing.set_current_span(ctx)
+      Tracing.add_event("Process died", [{"reason", inspect(reason)}])
+      Tracing.end_span()
     end)
 
     {:noreply, state}

lib/tracing/oban_telemetry.ex

@@ -69,7 +69,7 @@ defmodule Tracing.ObanTelemetry do
     })
     |> Span.set_attributes(attributes)
 
-    Tracing.Monitor.monitor(OpenTelemetry.Tracer.current_span_ctx())
+    Tracing.monitor()
   end
 
   def handle_event([:oban, :job, :stop], _, meta, _) do
@@ -82,7 +82,7 @@ defmodule Tracing.ObanTelemetry do
         %{kind: kind, reason: reason, stacktrace: stacktrace} = meta,
         _
       ) do
-    case OpenTelemetry.Tracer.current_span_ctx() do
+    case Tracing.current_span() do
       :undefined ->
         nil