o

akka.stream.javadsl

RestartSource

object RestartSource

A RestartSource wraps a Source that gets restarted when it completes or fails.

They are useful for graphs that need to run for longer than the Source can necessarily guarantee it will, for example, for Source streams that depend on a remote server that may crash or become partitioned. The RestartSource ensures that the graph can continue running while the Source restarts.

Source
RestartSource.scala
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  14. def onFailuresWithBackoff[T](minBackoff: Duration, maxBackoff: Duration, randomFactor: Double, maxRestarts: Int, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    Wrap the given Source with a Source 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 wrapped Source is handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    maxRestarts

    the amount of restarts is capped to this amount within a time frame of minBackoff. Passing 0 will cause no restarts and a negative number will not cap the amount of restarts.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @silent( "deprecated" )
  15. def onFailuresWithBackoff[T](minBackoff: Duration, maxBackoff: Duration, randomFactor: Double, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    This Source will never emit a failure, since the failure of the wrapped Source is always handled by restarting. The wrapped Source can be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @silent( "deprecated" )
  16. final def synchronized[T0](arg0: ⇒ T0): T0
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  21. def withBackoff[T](minBackoff: Duration, maxBackoff: Duration, randomFactor: Double, maxRestarts: Int, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails or complete 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 wrapped Source is handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    maxRestarts

    the amount of restarts is capped to this amount within a time frame of minBackoff. Passing 0 will cause no restarts and a negative number will not cap the amount of restarts.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @silent( "deprecated" )
  22. def withBackoff[T](minBackoff: Duration, maxBackoff: Duration, randomFactor: Double, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    This Source will never emit a complete or failure, since the completion or failure of the wrapped Source is always handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @silent( "deprecated" )

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  1. def finalize(): Unit
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    @throws( classOf[java.lang.Throwable] ) @Deprecated @deprecated
    Deprecated

    (Since version ) see corresponding Javadoc for more information.

  2. def onFailuresWithBackoff[T](minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double, maxRestarts: Int, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    Wrap the given Source with a Source 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 wrapped Source is handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    maxRestarts

    the amount of restarts is capped to this amount within a time frame of minBackoff. Passing 0 will cause no restarts and a negative number will not cap the amount of restarts.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @Deprecated @deprecated
    Deprecated

    (Since version 2.5.12) Use the overloaded one which accepts java.time.Duration instead.

  3. def onFailuresWithBackoff[T](minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails using an exponential backoff.

    This Source will never emit a failure, since the failure of the wrapped Source is always handled by restarting. The wrapped Source can be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @Deprecated @deprecated
    Deprecated

    (Since version 2.5.12) Use the overloaded one which accepts java.time.Duration instead.

  4. def withBackoff[T](minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double, maxRestarts: Int, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails or complete 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 wrapped Source is handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    maxRestarts

    the amount of restarts is capped to this amount within a time frame of minBackoff. Passing 0 will cause no restarts and a negative number will not cap the amount of restarts.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @Deprecated @deprecated
    Deprecated

    (Since version 2.5.12) Use the overloaded one which accepts java.time.Duration instead.

  5. def withBackoff[T](minBackoff: FiniteDuration, maxBackoff: FiniteDuration, randomFactor: Double, sourceFactory: Creator[Source[T, _]]): Source[T, NotUsed]

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    Wrap the given Source with a Source that will restart it when it fails or complete using an exponential backoff.

    This Source will never emit a complete or failure, since the completion or failure of the wrapped Source is always handled by restarting it. The wrapped Source can however be cancelled by cancelling this Source. When that happens, the wrapped Source, 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 a KillSwitch right after this Source in the graph.

    This uses the same exponential backoff algorithm as akka.pattern.Backoff.

    minBackoff

    minimum (initial) duration until the child actor will started again, if it is terminated

    maxBackoff

    the exponential back-off is capped to this duration

    randomFactor

    after calculation of the exponential back-off an additional random delay based on this factor is added, e.g. 0.2 adds up to 20% delay. In order to skip this additional delay pass in 0.

    sourceFactory

    A factory for producing the Source to wrap.

    Annotations
    @Deprecated @deprecated
    Deprecated

    (Since version 2.5.12) Use the overloaded one which accepts java.time.Duration instead.

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