trait RequestStrategy extends AnyRef
An ActorSubscriber defines a RequestStrategy
to control the stream back pressure.
- Source
- ActorSubscriber.scala
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abstract
def
requestDemand(remainingRequested: Int): Int
Invoked by the ActorSubscriber after each incoming message to determine how many more elements to request from the stream.
Invoked by the ActorSubscriber after each incoming message to determine how many more elements to request from the stream.
- remainingRequested
current remaining number of elements that have been requested from upstream but not received yet
- returns
demand of more elements from the stream, returning 0 means that no more elements will be requested for now