abstract class DowningProvider extends AnyRef
API for plugins that will handle downing of cluster nodes. Concrete plugins must subclass and have a public one argument constructor accepting an akka.actor.ActorSystem.
A custom DowningProvider can be configured with akka.cluster.downing-provider-class
When implementing a downing provider you should make sure that it will not split the cluster into several separate clusters in case of network problems or system overload (long GC pauses). This is much more difficult than it might be perceived at first, so carefully read the concerns and scenarios described in https://doc.akka.io/libraries/akka-core/current/split-brain-resolver.html
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- DowningProvider.scala
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- new DowningProvider()
Abstract Value Members
- abstract def downRemovalMargin: FiniteDuration
Time margin after which shards or singletons that belonged to a downed/removed partition are created in surviving partition.
Time margin after which shards or singletons that belonged to a downed/removed partition are created in surviving partition. The purpose of this margin is that in case of a network partition the persistent actors in the non-surviving partitions must be stopped before corresponding persistent actors are started somewhere else. This is useful if you implement downing strategies that handle network partitions, e.g. by keeping the larger side of the partition and shutting down the smaller side.
- abstract def downingActorProps: Option[Props]
If a props is returned it is created as a child of the core cluster daemon on cluster startup.
If a props is returned it is created as a child of the core cluster daemon on cluster startup. It should then handle downing using the regular akka.cluster.Cluster APIs. The actor will run on the same dispatcher as the cluster actor if dispatcher not configured.
May throw an exception which will then immediately lead to Cluster stopping, as the downing provider is vital to a working cluster.
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- This member is added by an implicit conversion from DowningProvider toany2stringadd[DowningProvider] performed by method any2stringadd in scala.Predef.
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- def ->[B](y: B): (DowningProvider, B)
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- This member is added by an implicit conversion from DowningProvider toArrowAssoc[DowningProvider] performed by method ArrowAssoc in scala.Predef.
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- def ensuring(cond: (DowningProvider) => Boolean, msg: => Any): DowningProvider
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- This member is added by an implicit conversion from DowningProvider toEnsuring[DowningProvider] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: (DowningProvider) => Boolean): DowningProvider
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- This member is added by an implicit conversion from DowningProvider toEnsuring[DowningProvider] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: Boolean, msg: => Any): DowningProvider
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- This member is added by an implicit conversion from DowningProvider toEnsuring[DowningProvider] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: Boolean): DowningProvider
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- This member is added by an implicit conversion from DowningProvider toEnsuring[DowningProvider] performed by method Ensuring in scala.Predef.
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(Since version 9)
- def formatted(fmtstr: String): String
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- This member is added by an implicit conversion from DowningProvider toStringFormat[DowningProvider] performed by method StringFormat in scala.Predef.
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(Since version 2.12.16) Use
formatString.format(value)instead ofvalue.formatted(formatString), or use thef""string interpolator. In Java 15 and later,formattedresolves to the new method in String which has reversed parameters.
- def →[B](y: B): (DowningProvider, B)
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- This member is added by an implicit conversion from DowningProvider toArrowAssoc[DowningProvider] performed by method ArrowAssoc in scala.Predef.
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(Since version 2.13.0) Use
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