Vertx: How to get fail() status code in failure handler?

Question

How can status code passed to RoutingContext.fail(int) be retrieved in failure handler (registered using Route.failureHandler)?

E.g. If processing of some route takes too long, it can be interrupted by TimeoutHandler that calls fail(408) on RoutingContext. fail method subsequently invokes failure handler (if registered). However I can't find any way (except for reflection & depending on implementation) how to find out in handler itself why it was called:

• RoutingContext.failure() returns null
• status code seems to be set only in private field of RoutingContextImpl, not yet in HttpServerResponse

Answer 1

Not sure about older version of Vert.x, but from 3.0.0 an up:

eventBus.send("some.address", "some value", event -> {
  if (event.succeeded()) {
    System.out.println("Received reply: " + event.result().body());
  } else {
    ReplyException cause = (ReplyException) event.cause();
    String failMessage = cause.getMessage();
    int failCode = cause.failureCode();
  }
});