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 static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import com.vaadin.flow.router.Location;
  import com.vaadin.flow.router.NavigationTrigger;
  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
  public class RouterInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.vaadin.flow.router.Router");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("navigate")
              .and(takesArguments(4))
              .and(takesArgument(1, named("com.vaadin.flow.router.Location")))
              .and(takesArgument(2, named("com.vaadin.flow.router.NavigationTrigger"))),
          this.getClass().getName() + "$NavigateAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class NavigateAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.Argument(1) Location location,
          @Advice.Argument(2) NavigationTrigger navigationTrigger) {
        if (navigationTrigger == NavigationTrigger.PAGE_LOAD) {
          helper().updateServerSpanName(location);
        }
      }
    }
  }
  