fix(boto3): make logic clearer

Author: pabloDeputter

sentry_sdk/integrations/boto3/_client.py

@@ -108,7 +108,11 @@ def sentry_patched_make_api_call(
         service_ext: "Optional[_ServiceExtension]" = None
         with capture_internal_exceptions():
             # resolve service extension for service-specific enrichment.
-            service_ext = _resolve_service(ctx.service_name)
+            service_ext = (
+                _resolve_service(ctx.service_name)
+                if ctx.service_name is not None
+                else None
+            )
 
         span: "Optional[Union[Span, StreamedSpan]]" = None
         with capture_internal_exceptions():

sentry_sdk/integrations/boto3/_services/registry.py

@@ -8,14 +8,12 @@
 
 # when py 3.15 drops, we might want to take a look at using
 # a lazy-loading approach using the new `lazy` keyword.
-# e.g. {"s3": _S3Extension}
+# e.g. {"s3": _S3Extension()}
 _SERVICE_EXTENSIONS: "Dict[str, _ServiceExtension]" = {}
 
 
 def _resolve_service(
     service_name: "str",
 ) -> "Optional[_ServiceExtension]":
-    if service_name in _SERVICE_EXTENSIONS:
-        return _SERVICE_EXTENSIONS[service_name]
     # preserve generic instrumentation when lookup fails.
-    return None
+    return _SERVICE_EXTENSIONS.get(service_name)