content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.jetty.v12_0;
  
  import static io.opentelemetry.javaagent.instrumentation.jetty.v12_0.Jetty12Singletons.helper;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge;
  import io.opentelemetry.javaagent.bootstrap.http.HttpServerResponseCustomizerHolder;
  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.eclipse.jetty.server.Request;
  import org.eclipse.jetty.server.Response;
  
  class Jetty12ServerInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.eclipse.jetty.server.Server");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("handle")
              .and(takesArgument(0, named("org.eclipse.jetty.server.Request")))
              .and(takesArgument(1, named("org.eclipse.jetty.server.Response")))
              .and(takesArgument(2, named("org.eclipse.jetty.util.Callback")))
              .and(isPublic()),
          this.getClass().getName() + "$HandlerAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class HandlerAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.This Object source,
          @Advice.Argument(0) Request request,
          @Advice.Argument(1) Response response,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        Context parentContext = Java8BytecodeBridge.currentContext();
        if (!helper().shouldStart(parentContext, request)) {
          return;
        }
  
        context = helper().start(parentContext, request, response);
        scope = context.makeCurrent();
  
        HttpServerResponseCustomizerHolder.getCustomizer()
            .customize(context, response, Jetty12ResponseMutator.INSTANCE);
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void stopSpan(
          @Advice.Argument(0) Request request,
          @Advice.Argument(1) Response response,
          @Advice.Thrown Throwable throwable,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
        if (scope == null) {
          return;
        }
        scope.close();
        if (throwable != null) {
          helper().end(context, request, response, throwable);
        }
      }
    }
  }
  