Support extensions for spanNameExtractor

Author: steverao

instrumentation-api/src/main/java/io/opentelemetry/instrumentation/api/internal/InstrumentationCustomizer.java

@@ -51,8 +51,7 @@ default OperationMetrics getOperationMetrics() {
    * @param <RESPONSE> the type of response object used by the instrumented library
    * @return an attributes extractor instance, or null if not applicable
    */
-  default <REQUEST, RESPONSE>
-      AttributesExtractor<? super REQUEST, ? super RESPONSE> getAttributesExtractor() {
+  default <REQUEST, RESPONSE> AttributesExtractor<REQUEST, RESPONSE> getAttributesExtractor() {
     return null;
   }
 
@@ -63,7 +62,7 @@ default OperationMetrics getOperationMetrics() {
    * @param <REQUEST> the type of request object used by the instrumented library
    * @return a context customizer instance, or null if not applicable
    */
-  default <REQUEST> ContextCustomizer<? super REQUEST> getContextCustomizer() {
+  default <REQUEST> ContextCustomizer<REQUEST> getContextCustomizer() {
     return null;
   }
 
@@ -74,7 +73,7 @@ default <REQUEST> ContextCustomizer<? super REQUEST> getContextCustomizer() {
    * @param <REQUEST> the type of request object used by the instrumented library
    * @return a customized {@link SpanNameExtractor}, or null if not applicable
    */
-  default <REQUEST> SpanNameExtractor<? super REQUEST> getSpanNameExtractor() {
+  default <REQUEST> SpanNameExtractor<REQUEST> getSpanNameExtractor() {
     return null;
   }
 }

instrumentation-api/src/test/java/io/opentelemetry/instrumentation/api/internal/InstrumentationCustomizerTest.java

@@ -46,18 +46,18 @@ public OperationMetrics getOperationMetrics() {
 
           @Override
           public <REQUEST, RESPONSE>
-              AttributesExtractor<? super REQUEST, ? super RESPONSE> getAttributesExtractor() {
-            return (AttributesExtractor<? super REQUEST, ? super RESPONSE>) attributesExtractor;
+              AttributesExtractor<REQUEST, RESPONSE> getAttributesExtractor() {
+            return (AttributesExtractor<REQUEST, RESPONSE>) attributesExtractor;
           }
 
           @Override
-          public <REQUEST> ContextCustomizer<? super REQUEST> getContextCustomizer() {
-            return (ContextCustomizer<? super REQUEST>) contextCustomizer;
+          public <REQUEST> ContextCustomizer<REQUEST> getContextCustomizer() {
+            return (ContextCustomizer<REQUEST>) contextCustomizer;
           }
 
           @Override
-          public <REQUEST> SpanNameExtractor<? super REQUEST> getSpanNameExtractor() {
-            return (SpanNameExtractor<? super REQUEST>) spanNameExtractor;
+          public <REQUEST> SpanNameExtractor<REQUEST> getSpanNameExtractor() {
+            return (SpanNameExtractor<REQUEST>) spanNameExtractor;
           }
         };
   }