Class RestartWithBackoffSource<T>
- java.lang.Object
-
- akka.stream.stage.GraphStageWithMaterializedValue<S,NotUsed>
-
- akka.stream.stage.GraphStage<SourceShape<T>>
-
- akka.stream.scaladsl.RestartWithBackoffSource<T>
-
- All Implemented Interfaces:
Graph<SourceShape<T>,NotUsed>
public final class RestartWithBackoffSource<T> extends GraphStage<SourceShape<T>>
Wrap the givenSource
with aSource
that will restart it when it fails using an exponential backoff.This
Source
will not emit a complete or failure as long as maxRestarts is not reached, since the completion or failure of the wrappedSource
is handled by restarting it. The wrappedSource
can however be cancelled by cancelling thisSource
. When that happens, the wrappedSource
, if currently running will be cancelled, and it will not be restarted. This can be triggered simply by the downstream cancelling, or externally by introducing aKillSwitch
right after thisSource
in the graph.This uses the same exponential backoff algorithm as
Backoff
.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.
0.2
adds up to20%
delay. In order to skip this additional delay pass in0
. param: maxRestarts the amount of restarts is capped to this amount within a time frame of minBackoff. Passing0
will cause no restarts and a negative number will not cap the amount of restarts. param: sourceFactory A factory for producing theSource
to wrap.
-
-
Constructor Summary
Constructors Constructor Description RestartWithBackoffSource(scala.Function0<Source<T,?>> sourceFactory, scala.concurrent.duration.FiniteDuration minBackoff, scala.concurrent.duration.FiniteDuration maxBackoff, double randomFactor, boolean onlyOnFailures, int maxRestarts)
-
Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RestartWithBackoffLogic<SourceShape<T>>
createLogic(Attributes inheritedAttributes)
Outlet<T>
out()
SourceShape<T>
shape()
The shape of a graph is all that is externally visible: its inlets and outlets.-
Methods inherited from class akka.stream.stage.GraphStage
createLogicAndMaterializedValue
-
Methods inherited from class akka.stream.stage.GraphStageWithMaterializedValue
createLogicAndMaterializedValue, initialAttributes, traversalBuilder, withAttributes
-
-
-
-
Method Detail
-
createLogic
public RestartWithBackoffLogic<SourceShape<T>> createLogic(Attributes inheritedAttributes)
- Specified by:
createLogic
in classGraphStage<SourceShape<T>>
-
shape
public SourceShape<T> shape()
Description copied from interface:Graph
The shape of a graph is all that is externally visible: its inlets and outlets.- Returns:
- (undocumented)
-
-