what can be a better way to remove empty flowfiles which contents only curly braces

Question

Is there any better way to remove the empty flowfile which contents only curly braces {} . I have achieved, (attaching the flow for reference) but looking for short and effective method like Jolt Spec or any other to reduce the processing time and processor count.

Answer 1

You can use "@" wildcard vs. "" matching nested within a wrapper object notation with key "*" in a JoltTransformJSON processor such as

[
  {
    "operation": "shift",
    "spec": {
      "*": {
        "@": ""
      }
    }
  }
]