Add code attributes to vaadin instrumentation

instrumentation/vaadin-14.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/vaadin/RpcCodeAttributesGetter.java

@@ -0,0 +1,21 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.javaagent.instrumentation.vaadin;
+
+import io.opentelemetry.instrumentation.api.incubator.semconv.code.CodeAttributesGetter;
+
+public class RpcCodeAttributesGetter implements CodeAttributesGetter<VaadinRpcRequest> {
+
+  @Override
+  public Class<?> getCodeClass(VaadinRpcRequest request) {
+    return request.getRpcInvocationHandler().getClass();
+  }
+
+  @Override
+  public String getMethodName(VaadinRpcRequest request) {
+    return request.getMethodName();
+  }
+}

instrumentation/vaadin-14.2/javaagent/src/main/java/io/opentelemetry/javaagent/instrumentation/vaadin/VaadinSingletons.java

@@ -50,10 +50,12 @@ public class VaadinSingletons {
                     context.with(REQUEST_HANDLER_CONTEXT_KEY, true))
             .buildInstrumenter();
 
+    RpcCodeAttributesGetter rpcCodeAttributesGetter = new RpcCodeAttributesGetter();
     RPC_INSTRUMENTER =
         Instrumenter.<VaadinRpcRequest, Void>builder(
                 GlobalOpenTelemetry.get(), INSTRUMENTATION_NAME, VaadinSingletons::rpcSpanName)
             .setEnabled(ExperimentalConfig.get().controllerTelemetryEnabled())
+            .addAttributesExtractor(CodeAttributesExtractor.create(rpcCodeAttributesGetter))
             .buildInstrumenter();
 
     SERVICE_INSTRUMENTER =

instrumentation/vaadin-14.2/testing/src/main/java/io/opentelemetry/javaagent/instrumentation/vaadin/AbstractVaadinTest.java

@@ -5,6 +5,7 @@
 
 package io.opentelemetry.javaagent.instrumentation.vaadin;
 
+import static io.opentelemetry.instrumentation.testing.junit.code.SemconvCodeStabilityUtil.codeFunctionAssertions;
 import static io.opentelemetry.sdk.testing.assertj.OpenTelemetryAssertions.assertThat;
 import static org.awaitility.Awaitility.await;
 
@@ -170,7 +171,11 @@ private void assertButtonClick() {
                         assertThat(spans.get(spans.size() - 1))
                             .hasName("EventRpcHandler.handle/click")
                             .hasParent(spans.get(spans.size() - 2))
-                            .hasKind(SpanKind.INTERNAL);
+                            .hasKind(SpanKind.INTERNAL)
+                            .hasAttributesSatisfyingExactly(
+                                codeFunctionAssertions(
+                                    "com.vaadin.flow.server.communication.rpc.EventRpcHandler",
+                                    "handle"));
                       });
             });
   }