dsmiley commented on a change in pull request #115:
URL: https://github.com/apache/solr/pull/115#discussion_r638416407



##########
File path: solr/core/src/java/org/apache/solr/api/V2HttpCall.java
##########
@@ -360,6 +366,80 @@ protected void execute(SolrQueryResponse rsp) {
     SolrCore.postDecorateResponse(handler, solrReq, rsp);
   }
 
+  @Override
+  protected void populateTracingSpan(Span span) {
+    // Set db.instance
+    String coreOrColName = this.origCorename;
+    if (coreOrColName == null) {
+      Map<String, String> pathTemplateValues = getUrlParts(); // == 
solrReq.getPathTemplateValues()
+      coreOrColName = pathTemplateValues.get("collection");
+      if (coreOrColName == null) {
+        coreOrColName = pathTemplateValues.get("core");
+      }
+    }
+    if (coreOrColName != null) {
+      span.setTag(Tags.DB_INSTANCE, coreOrColName);
+    }
+
+    // Get the templatize-ed path
+    String path;
+    if (api instanceof AnnotatedApi) {
+      // ideal scenario; eventually everything might be AnnotatedApi?
+      path = ((AnnotatedApi) api).getEndPoint().path()[0]; // consider first 
to be primary
+    } else {
+      path = computeEndpointPath();
+      // TODO consider getValidators, looking for command & path?
+    }
+
+    String verb = req.getMethod().toLowerCase(Locale.ROOT);
+    // if this api has commands ...
+    final Map<String, JsonSchemaValidator> validators = getValidators(); // 
should be cached
+    if (validators != null && validators.isEmpty() == false && solrReq != 
null) {

Review comment:
       I'm suspecting you meant "avoid getting the validators *when* the verb 
is absent" (not "and") and I think maybe you are referring to the command?  As 
I explained, to know if there is a command, getValidators should be called, 
which is internally cached.




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