content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.restlet.v2_0;
  
  import static io.opentelemetry.instrumentation.api.semconv.http.HttpServerRouteSource.CONTROLLER;
  import static io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge.currentContext;
  import static io.opentelemetry.javaagent.instrumentation.restlet.v2_0.RestletSingletons.instrumenter;
  import static io.opentelemetry.javaagent.instrumentation.restlet.v2_0.RestletSingletons.serverSpanName;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  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.instrumentation.api.semconv.http.HttpServerRoute;
  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.restlet.Request;
  import org.restlet.Response;
  import org.restlet.data.Status;
  
  public class ServerInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("org.restlet.Server");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod()
              .and(named("handle"))
              .and(takesArgument(0, named("org.restlet.Request")))
              .and(takesArgument(1, named("org.restlet.Response"))),
          this.getClass().getName() + "$ServerHandleAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ServerHandleAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void beginRequest(
          @Advice.Argument(0) Request request,
          @Advice.Argument(1) Response response,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        Context parentContext = currentContext();
  
        if (!instrumenter().shouldStart(parentContext, request)) {
          return;
        }
  
        context = instrumenter().start(parentContext, request);
        scope = context.makeCurrent();
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void finishRequest(
          @Advice.Argument(0) Request request,
          @Advice.Argument(1) Response response,
          @Advice.Thrown Throwable exception,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
  
        if (scope == null) {
          return;
        }
  
        scope.close();
  
        if (Status.CLIENT_ERROR_NOT_FOUND.equals(response.getStatus())) {
          HttpServerRoute.update(context, CONTROLLER, serverSpanName(), "/*");
        }
  
        HttpServerResponseCustomizerHolder.getCustomizer()
            .customize(context, response, RestletResponseMutator.INSTANCE);
  
        if (exception != null) {
          instrumenter().end(context, request, response, exception);
          return;
        }
  
        // Restlet suppresses exceptions and sets the throwable in status
        Throwable statusThrowable = response.getStatus().getThrowable();
  
        instrumenter().end(context, request, response, statusThrowable);
      }
    }
  }
  