content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.grails;
  
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  import static net.bytebuddy.matcher.ElementMatchers.takesArguments;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.instrumentation.api.semconv.http.HttpServerRoute;
  import io.opentelemetry.instrumentation.api.semconv.http.HttpServerRouteSource;
  import io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge;
  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;
  import org.grails.web.mapping.mvc.GrailsControllerUrlMappingInfo;
  
  public class UrlMappingsInfoHandlerAdapterInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.grails.web.mapping.mvc.UrlMappingsInfoHandlerAdapter");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(isPublic())
              .and(named("handle"))
              .and(takesArgument(2, named(Object.class.getName())))
              .and(takesArguments(3)),
          UrlMappingsInfoHandlerAdapterInstrumentation.class.getName() + "$ServerSpanNameAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ServerSpanNameAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void nameSpan(@Advice.Argument(2) Object handler) {
  
        if (handler instanceof GrailsControllerUrlMappingInfo) {
          Context parentContext = Java8BytecodeBridge.currentContext();
  
          HttpServerRoute.update(
              parentContext,
              HttpServerRouteSource.CONTROLLER,
              GrailsServerSpanNaming.SERVER_SPAN_NAME,
              (GrailsControllerUrlMappingInfo) handler);
        }
      }
    }
  }
  