content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.kotlinxcoroutines;
  
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.extendsClass;
  import static io.opentelemetry.javaagent.extension.matcher.AgentElementMatchers.hasClassesNamed;
  import static net.bytebuddy.matcher.ElementMatchers.named;
  import static net.bytebuddy.matcher.ElementMatchers.takesArgument;
  
  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 KotlinCoroutineDispatcherInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<ClassLoader> classLoaderOptimization() {
      return hasClassesNamed("kotlinx.coroutines.CoroutineDispatcher");
    }
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return extendsClass(named("kotlinx.coroutines.CoroutineDispatcher"));
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      transformer.applyAdviceToMethod(
          named("dispatch").and(takesArgument(1, Runnable.class)),
          this.getClass().getName() + "$StopContextPropagationAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class StopContextPropagationAdvice {
  
      @Advice.OnMethodEnter
      public static void enter(@Advice.Argument(value = 1, readOnly = false) Runnable runnable) {
        if (runnable != null) {
          runnable = RunnableWrapper.stopPropagation(runnable);
        }
      }
    }
  }
  