content: /*
   * Copyright The OpenTelemetry Authors
   * SPDX-License-Identifier: Apache-2.0
   */
  
  package io.opentelemetry.javaagent.instrumentation.mongo.v4_0;
  
  import static net.bytebuddy.matcher.ElementMatchers.named;
  
  import io.opentelemetry.context.Scope;
  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 AsyncWorkManagerInstrumentation implements TypeInstrumentation {
  
    @Override
    public ElementMatcher<TypeDescription> typeMatcher() {
      return named("com.mongodb.internal.connection.DefaultConnectionPool$AsyncWorkManager");
    }
  
    @Override
    public void transform(TypeTransformer transformer) {
      // this method sets up a new thread pool and submits a task to it, we need to avoid context
      // propagating there
      transformer.applyAdviceToMethod(
          named("initUnlessClosed"),
          AsyncWorkManagerInstrumentation.class.getName() + "$DisablePropagationAdvice");
    }
  
    @SuppressWarnings("unused")
    public static class DisablePropagationAdvice {
      @Advice.OnMethodEnter(suppress = Throwable.class)
      public static Scope onEnter() {
        if (Java8BytecodeBridge.currentContext() != Java8BytecodeBridge.rootContext()) {
          // Prevent context from leaking by running this method under root context.
          // Root context is not propagated by executor instrumentation.
          return Java8BytecodeBridge.rootContext().makeCurrent();
        }
        return null;
      }
  
      @Advice.OnMethodExit(suppress = Throwable.class)
      public static void onExit(@Advice.Enter Scope scope) {
        if (scope != null) {
          scope.close();
        }
      }
    }
  }
  