content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.struts.v2_3;
  
  import static io.opentelemetry.instrumentation.api.semconv.http.HttpServerRouteSource.CONTROLLER;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.implementsInterface;
  import static io.opentelemetry.javaagent.instrumentation.struts.v2_3.StrutsSingletons.instrumenter;
  import static net.bytebuddy.matcher.ElementMatchers.isMethod;
  import static net.bytebuddy.matcher.ElementMatchers.isPublic;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import com.opensymphony.xwork2.ActionInvocation;
  import io.opentelemetry.context.Context;
  import io.opentelemetry.context.Scope;
  import io.opentelemetry.instrumentation.api.semconv.http.HttpServerRoute;
  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;
  
  public class ActionInvocationInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      return hasClassesNamed("com.opensymphony.xwork2.ActionInvocation");
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return implementsInterface(named("com.opensymphony.xwork2.ActionInvocation"));
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isMethod().and(isPublic()).and(named("invokeActionOnly")),
          this.getClass().getName() + "$InvokeActionOnlyAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class InvokeActionOnlyAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void onEnter(
          @Advice.This ActionInvocation actionInvocation,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
        Context parentContext = Java8BytecodeBridge.currentContext();
  
        HttpServerRoute.update(
            parentContext,
            CONTROLLER,
            StrutsServerSpanNaming.SERVER_SPAN_NAME,
            actionInvocation.getProxy());
  
        if (!instrumenter().shouldStart(parentContext, actionInvocation)) {
          return;
        }
  
        context = instrumenter().start(parentContext, actionInvocation);
        scope = context.makeCurrent();
      }
  
      @Advice.OnMethodExit(onThrowable = Throwable.class, suppress = Throwable.class)
      public static void stopSpan(
          @Advice.Thrown Throwable throwable,
          @Advice.This ActionInvocation actionInvocation,
          @Advice.Local("otelContext") Context context,
          @Advice.Local("otelScope") Scope scope) {
        if (scope == null) {
          return;
        }
        scope.close();
  
        instrumenter().end(context, actionInvocation, null, throwable);
      }
    }
  }
  