"handle-first" (default): run onEvent, then answer 200; a thrown error answers 500 so the
provider retries. "ack-first": answer 200 immediately, then run onEvent (enqueue only!).
Optionalparam
param?:string
Route param holding the provider id. Default "provider". Ignored when provider is set.
"handle-first" (default): run
onEvent, then answer 200; a thrown error answers 500 so the provider retries. "ack-first": answer 200 immediately, then runonEvent(enqueue only!).