content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.ratpack;
  
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isStatic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  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 ratpack.handling.HandlerDecorator;
  import ratpack.registry.Registry;
  
  public class ServerRegistryInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("ratpack.server.internal.ServerRegistry");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod().and(isStatic()).and(named("buildBaseRegistry")),
          ServerRegistryInstrumentation.class.getName() + "$BuildAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class BuildAdvice {
  
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void injectTracing(@Advice.Return(readOnly = false) Registry registry) {
        registry =
            registry.join(
                Registry.builder().add(HandlerDecorator.prepend(TracingHandler.INSTANCE)).build());
      }
    }
  }
  