fix(emqx_opentelemetry): fix dialyzer warnings

apps/emqx/src/emqx_external_trace.erl

@@ -39,12 +39,12 @@
 
 -define(PROVIDER, {?MODULE, trace_provider}).
 
--define(with_provider(IfRegisitered, IfNotRegisired),
+-define(with_provider(IfRegistered, IfNotRegistered),
     case persistent_term:get(?PROVIDER, undefined) of
         undefined ->
-            IfNotRegisired;
+            IfNotRegistered;
         Provider ->
-            Provider:IfRegisitered
+            Provider:IfRegistered
     end
 ).
 

apps/emqx_opentelemetry/rebar.config

@@ -3,13 +3,13 @@
 {deps,
     [{emqx, {path, "../emqx"}}
     %% trace
-    , {opentelemetry_api, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.3-emqx"}, "apps/opentelemetry_api"}}
-    , {opentelemetry, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.3-emqx"}, "apps/opentelemetry"}}
+    , {opentelemetry_api, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.4-emqx"}, "apps/opentelemetry_api"}}
+    , {opentelemetry, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.4-emqx"}, "apps/opentelemetry"}}
     %% log metrics
-    , {opentelemetry_experimental, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.3-emqx"}, "apps/opentelemetry_experimental"}}
-    , {opentelemetry_api_experimental, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.3-emqx"}, "apps/opentelemetry_api_experimental"}}
+    , {opentelemetry_experimental, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.4-emqx"}, "apps/opentelemetry_experimental"}}
+    , {opentelemetry_api_experimental, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.4-emqx"}, "apps/opentelemetry_api_experimental"}}
     %% export
-    , {opentelemetry_exporter, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.3-emqx"}, "apps/opentelemetry_exporter"}}
+    , {opentelemetry_exporter, {git_subdir, "https://github.com/emqx/opentelemetry-erlang", {tag, "v1.4.4-emqx"}, "apps/opentelemetry_exporter"}}
     ]}.
 
 {edoc_opts, [{preprocess, true}]}.

apps/emqx_opentelemetry/src/emqx_otel_metrics.erl

@@ -102,12 +102,12 @@ cleanup() ->
 
 safe_stop_default_metrics() ->
     try
-        _ = opentelemetry_experimental:stop_default_metrics()
+        _ = opentelemetry_experimental:stop_default_metrics(),
+        ok
     catch
         %% noramal scenario, metrics supervisor is not started
         exit:{noproc, _} -> ok
-    end,
-    ok.
+    end.
 
 create_metric_views() ->
     Meter = opentelemetry_experimental:get_meter(),

apps/emqx_opentelemetry/src/emqx_otel_trace.erl

@@ -37,7 +37,6 @@
 -include_lib("opentelemetry_api/include/otel_tracer.hrl").
 
 -define(EMQX_OTEL_CTX, otel_ctx).
-%% NOTE: it's possible to use trace_flags to set is_sampled flag
 -define(IS_ENABLED, emqx_enable).
 -define(USER_PROPERTY, 'User-Property').
 
@@ -115,13 +114,11 @@ trace_process_publish(Packet, Channel, ProcessFun) ->
             Ctx = otel_tracer:set_current_span(RootCtx1, SpanCtx),
             %% put ctx to packet, so it can be further propagated
             Packet1 = put_ctx_to_packet(Ctx, Packet),
-            %% TODO: consider getting rid of propagating Ctx through process dict as it's anyway seems to have
-            %% very limited usage
-            otel_ctx:attach(Ctx),
+            _ = otel_ctx:attach(Ctx),
             try
                 ProcessFun(Packet1, Channel)
             after
-                ?end_span(),
+                _ = ?end_span(),
                 clear()
             end
     end.
@@ -261,7 +258,8 @@ clear() ->
 
 safe_stop_default_tracer() ->
     try
-        _ = opentelemetry:stop_default_tracer_provider()
+        _ = opentelemetry:stop_default_tracer_provider(),
+        ok
     catch
         %% noramal scenario, opentelemetry supervisor is not started
         exit:{noproc, _} -> ok