Object/Class

com.twitter.finagle.loadbalancer

LoadBalancerFactory

Related Docs: class LoadBalancerFactory | package loadbalancer

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object LoadBalancerFactory

Exposes a Stack.Module which composes load balancing into the respective Stack. This is mixed in by default into Finagle's com.twitter.finagle.client.StackClient. The only necessary configuration is a LoadBalancerFactory.Dest which represents a changing collection of addresses that is load balanced over.

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Type Members

  1. case class AddressOrdering(ordering: Ordering[Address]) extends Product with Serializable

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    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory with a finagle Address ordering.

    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory with a finagle Address ordering. The collection of endpoints in a load balancer are sorted by this ordering. Although it's generally not a good idea to have the same ordering across process boundaries, the final ordering decision is left to the load balancer implementations. This only provides a stable ordering before we hand off the collection of endpoints to the balancer.

  2. case class Dest(va: Var[Addr]) extends Product with Serializable

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    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory with a collection of addrs to load balance.

  3. case class EnableProbation(enable: Boolean) extends Product with Serializable

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    A class eligible for configuring a client's load balancer probation setting.

    A class eligible for configuring a client's load balancer probation setting. When enabled, the balancer treats removals as advisory and flags them. If a a flagged endpoint is also detected as unhealthy by Finagle's session qualifiers (e.g. fail-fast, failure accrual, etc) then the host is removed from the collection.

  4. case class ErrorLabel(label: String) extends Product with Serializable

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    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory with a label for use in error messages.

  5. case class HostStats(hostStatsReceiver: StatsReceiver) extends Product with Serializable

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    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory per host com.twitter.finagle.stats.StatsReceiver.

    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory per host com.twitter.finagle.stats.StatsReceiver. If the per-host StatsReceiver is not null, the load balancer will broadcast stats to it (scoped with the "host:port" pair) for each host in the destination. For clients with a large host sets in their destination, this can cause unmanageable memory pressure.

  6. case class Param(loadBalancerFactory: LoadBalancerFactory) extends Product with Serializable

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    A class eligible for configuring a com.twitter.finagle.Stackable com.twitter.finagle.loadbalancer.LoadBalancerFactory.

  7. case class WhenNoNodesOpenParam(whenNoNodesOpen: WhenNoNodesOpen) extends Product with Serializable

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    A class eligible for configuring the LoadBalancerFactory behavior when the balancer does not find a node with Status.Open.

    A class eligible for configuring the LoadBalancerFactory behavior when the balancer does not find a node with Status.Open.

    The default is to "fail open" and pick a node at random.

    See also

    WhenNoNodesOpen

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  1. final def !=(arg0: Any): Boolean

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  4. object AddressOrdering extends Serializable

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  5. object Dest extends Serializable

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  6. implicit object EnableProbation extends Stack.Param[EnableProbation] with Serializable

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  7. object ErrorLabel extends Serializable

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  8. object HostStats extends Serializable

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  9. object Param extends Serializable

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  10. object WhenNoNodesOpenParam extends Serializable

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