content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.vaadin;
  
  import static io.opentelemetry.javaagent.instrumentation.vaadin.VaadinSingletons.helper;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import com.vaadin.flow.component.UI;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  // set server span name on initial page load, vaadin 15+
  public class JavaScriptBootstrapUiInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.vaadin.flow.component.internal.JavaScriptBootstrapUI");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("connectClient"), this.getClass().getName() + "$ConnectClientAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ConnectClientAdvice {
  
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void onExit(@Advice.This UI ui) {
        helper().updateServerSpanName(ui);
      }
    }
  }
  