content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.vertx.reactive;
  
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static net.bytebuddy.matcher.ElementMatchers.isConstructor;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.namedOneOf;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  import io.opentelemetry.javaagent.bootstrap.Java8BytecodeBridge;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeInstrumentation;
  import io.opentelemetry.javaagent.extension.instrumentation.TypeTransformer;
  import io.vertx.core.AsyncResult;
  import io.vertx.core.Handler;
  import java.util.function.Consumer;
  import net.bytebuddy.asm.Advice;
  import net.bytebuddy.description.type.TypeDescription;
  import net.bytebuddy.matcher.ElementMatcher;
  
  /** This instrumentation allows span context propagation across Vert.x reactive executions. */
  public class AsyncResultSingleInstrumentation implements TypeInstrumentation {
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      // Different versions of Vert.x has this class in different packages
      return hasClassesNamed("io.vertx.reactivex.core.impl.AsyncResultSingle")
          .or(hasClassesNamed("io.vertx.reactivex.impl.AsyncResultSingle"));
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return namedOneOf(
          "io.vertx.reactivex.core.impl.AsyncResultSingle",
          "io.vertx.reactivex.impl.AsyncResultSingle");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          isConstructor().and(takesArgument(0, named("io.vertx.core.Handler"))),
          this.getClass().getName() + "$ConstructorWithHandlerAdvice");
      transformer.applyAdviceToMethod(
          isConstructor().and(takesArgument(0, Consumer.class)),
          this.getClass().getName() + "$ConstructorWithConsumerAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class ConstructorWithHandlerAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void wrapHandler(
          @Advice.Argument(value = 0, readOnly = false) Handler<Handler<AsyncResult<?>>> handler) {
        handler =
            AsyncResultHandlerWrapper.wrapIfNeeded(handler, Java8BytecodeBridge.currentContext());
      }
    }
  
    @SuppressWarnings("unused")
    public static class ConstructorWithConsumerAdvice {
  
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static void wrapHandler(
          @Advice.Argument(value = 0, readOnly = false) Consumer<Handler<AsyncResult<?>>> handler) {
        handler =
            AsyncResultConsumerWrapper.wrapIfNeeded(handler, Java8BytecodeBridge.currentContext());
      }
    }
  }
  