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 static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  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;
  
  // update server span name to route of current view
  public class UiInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.vaadin.flow.component.UI");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      // setCurrent is called by some request handler when they have accepted the request
      // we can get the path of currently active route from ui
      transformer.applyAdviceToMethod(
          named("setCurrent").and(takesArgument(0, named("com.vaadin.flow.component.UI"))),
          this.getClass().getName() + "$SetCurrentAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class SetCurrentAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(@Advice.Argument(0) UI ui) {
        helper().updateServerSpanName(ui);
      }
    }
  }
  