class ClusterMetricsExtension extends Extension
Cluster metrics extension.
Cluster metrics is primarily for load-balancing of nodes. It controls metrics sampling at a regular frequency, prepares highly variable data for further analysis by other entities, and publishes the latest cluster metrics data around the node ring and local eventStream to assist in determining the need to redirect traffic to the least-loaded nodes.
Metrics sampling is delegated to the MetricsCollector.
Smoothing of the data for each monitored process is delegated to the EWMA for exponential weighted moving average.
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- new ClusterMetricsExtension(system: ExtendedActorSystem)
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- This member is added by an implicit conversion from ClusterMetricsExtension toany2stringadd[ClusterMetricsExtension] performed by method any2stringadd in scala.Predef.
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- def ->[B](y: B): (ClusterMetricsExtension, B)
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- This member is added by an implicit conversion from ClusterMetricsExtension toArrowAssoc[ClusterMetricsExtension] performed by method ArrowAssoc in scala.Predef.
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- def ensuring(cond: (ClusterMetricsExtension) => Boolean, msg: => Any): ClusterMetricsExtension
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- This member is added by an implicit conversion from ClusterMetricsExtension toEnsuring[ClusterMetricsExtension] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: (ClusterMetricsExtension) => Boolean): ClusterMetricsExtension
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- This member is added by an implicit conversion from ClusterMetricsExtension toEnsuring[ClusterMetricsExtension] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: Boolean, msg: => Any): ClusterMetricsExtension
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- This member is added by an implicit conversion from ClusterMetricsExtension toEnsuring[ClusterMetricsExtension] performed by method Ensuring in scala.Predef.
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- def ensuring(cond: Boolean): ClusterMetricsExtension
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- This member is added by an implicit conversion from ClusterMetricsExtension toEnsuring[ClusterMetricsExtension] performed by method Ensuring in scala.Predef.
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- val settings: ClusterMetricsSettings
Metrics extension configuration.
- def subscribe(metricsListener: ActorRef): Unit
Subscribe user metrics listener actor unto ClusterMetricsEvent events published by extension on the system event bus.
- val supervisor: ActorRef
Supervisor actor.
Supervisor actor. Accepts subtypes of CollectionControlMessages to manage metrics collection at runtime.
- final def synchronized[T0](arg0: => T0): T0
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- def unsubscribe(metricsListenter: ActorRef): Unit
Unsubscribe user metrics listener actor from ClusterMetricsEvent events published by extension on the system event bus.
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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 ClusterMetricsExtension toStringFormat[ClusterMetricsExtension] 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): (ClusterMetricsExtension, B)
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- This member is added by an implicit conversion from ClusterMetricsExtension toArrowAssoc[ClusterMetricsExtension] performed by method ArrowAssoc in scala.Predef.
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(Since version 2.13.0) Use
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