use module attributes

spandex-project · Oct 9, 2019 · f895594 · f895594
1 parent fd9383e
commit f895594
Showing 1 changed file with 9 additions and 4 deletions.
diff --git a/lib/spandex_phoenix/instrumenter.ex b/lib/spandex_phoenix/instrumenter.ex
@@ -23,27 +23,32 @@ defmodule SpandexPhoenix.Instrumenter do
         raise "You must configure a tracer or an otp_app in #{__MODULE__}"
       end
 
+      @tracer tracer
+      @otp_app otp_app
+
       @doc false
       def phoenix_controller_call(:start, _compiled_meta, %{conn: conn}) do
-        tracer = tracer || Application.get_env(otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
+        tracer = @tracer || Application.get_env(@otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
         apply(tracer, :start_span, ["Phoenix.Controller", [resource: controller_resource_name(conn)]])
       end
 
       @doc false
       def phoenix_controller_call(:stop, _time_diff, _start_meta) do
-        tracer = tracer || Application.get_env(otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
+        tracer = @tracer || Application.get_env(@otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
         apply(tracer, :finish_span, [])
       end
 
       @doc false
       def phoenix_controller_render(:start, _compiled_meta, %{view: view}) do
-        tracer = tracer || Application.get_env(otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
+        tracer = @tracer || Application.get_env(@otp_app, __MODULE__)[:tracer] || raise(@tracer_not_configured_msg)
         apply(tracer, :start_span, ["Phoenix.View", [resource: view]])
       end
 
       @doc false
       def phoenix_controller_render(:stop, _time_diff, _start_meta) do
-        tracer = tracer || Application.get_env(otp_app, :spandex_phoenix)[:tracer] || raise(@tracer_not_configured_msg)
+        tracer =
+          @tracer || Application.get_env(@otp_app, :spandex_phoenix)[:tracer] || raise(@tracer_not_configured_msg)
+
         apply(tracer, :finish_span, [])
       end