NewRelic transaction naming for Dropwizard

newrelic_transaction_naming.java

public class TimedResourceMethodDispatchProvider implements ResourceMethodDispatchProvider {
  final ResourceMethodDispatchProvider provider;

  public TimedResourceMethodDispatchProvider(ResourceMethodDispatchProvider provider) {
    this.provider = provider;
  }

  @Override
  public RequestDispatcher create(AbstractResourceMethod abstractResourceMethod) {
    RequestDispatcher dispatcher = provider.create(abstractResourceMethod);
    Timed timed = abstractResourceMethod.getAnnotation(Timed.class);

    if (timed != null) {
      String resourceName = abstractResourceMethod.getResource().getResourceClass().getSimpleName();
      String methodName = abstractResourceMethod.getMethod().getName();
      return new TimedRequestDispatcher(dispatcher, resourceName + "/" + methodName);
    }
    return dispatcher;
  }
}

public class TimedResourceMethodDispatchAdapter implements ResourceMethodDispatchAdapter {

  public TimedResourceMethodDispatchAdapter() { }

  @Override
  public ResourceMethodDispatchProvider adapt(ResourceMethodDispatchProvider provider) {
    return new TimedResourceMethodDispatchProvider(provider);
  }
}

public class TimedRequestDispatcher implements RequestDispatcher {
  final RequestDispatcher dispatcher;
  final String transactionName;

  public TimedRequestDispatcher(RequestDispatcher dispatcher, String transactionName) {
    this.dispatcher = dispatcher;
    this.transactionName = transactionName;
  }

  @Override
  public void dispatch(Object resource, HttpContext context) {
    NewRelic.setTransactionName(null, transactionName);
    dispatcher.dispatch(resource, context);
  }
}

Hi, does NewRelic.setTransactionName rely on ThreadLocal? I am guessing it does and hence won't work out of the box with non-blocking/multithreaded code (e.g. LinkedIn ParSeq or Netflix Hystrix).

But I might be wrong.