Use the “Ask Pattern” to send a request-reply message to the target
ref actor (of the classic actors API).
S generic parameter is used to cast the responses from the actor to the expected outgoing flow type.
Similar to the plain ask pattern, the target actor is allowed to reply with
Status.Failure will cause the operator to fail with the cause carried in the
- ActorFlow.ask for the
emits when the ask
CompletionStage returned by the provided function finishes for the next element in sequence
backpressures when the number of ask
CompletionStage s reaches the configured parallelism and the downstream backpressures
completes when upstream completes and all ask
CompletionStage s has been completed and all elements has been emitted