public final class RestartWithBackoffSink<T> extends GraphStage<SinkShape<T>>Wrap the given
Sinkthat will restart it when it fails or complete using an exponential backoff.
Sinkwill not cancel as long as maxRestarts is not reached, since cancellation by the wrapped
Sinkis handled by restarting it. The wrapped
Sinkcan however be completed by feeding a completion or error into this
Sink. When that happens, the
Sink, if currently running, will terminate and will not be restarted. This can be triggered simply by the upstream completing, or externally by introducing a
KillSwitchright before this
Sinkin the graph.
The restart process is inherently lossy, since there is no coordination between cancelling and the sending of messages. When the wrapped
Sinkdoes cancel, this
Sinkwill backpressure, however any elements already sent may have been lost.
This uses the same exponential backoff algorithm as
param: minBackoff minimum (initial) duration until the child actor will started again, if it is terminated param: maxBackoff the exponential back-off is capped to this duration param: randomFactor after calculation of the exponential back-off an additional random delay based on this factor is added, e.g.
0.2adds up to
20%delay. In order to skip this additional delay pass in
0. param: maxRestarts the amount of restarts is capped to this amount within a time frame of minBackoff. Passing
0will cause no restarts and a negative number will not cap the amount of restarts. param: sinkFactory A factory for producing the
All Methods Instance Methods Concrete Methods Modifier and Type Method Description
shape()The shape of a graph is all that is externally visible: its inlets and outlets.
Methods inherited from class akka.stream.stage.GraphStageWithMaterializedValue
createLogicAndMaterializedValue, initialAttributes, traversalBuilder, withAttributes
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public RestartWithBackoffLogic<SinkShape<T>> createLogic(Attributes inheritedAttributes)