Object

com.twitter.finagle.liveness

FailureDetector

Related Doc: package liveness

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object FailureDetector

Companion object capable of creating a FailureDetector based on parameterized config.

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  1. sealed trait Config extends AnyRef

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    Base type used to identify and configure the FailureDetector.

  2. case class MockConfig(fn: () ⇒ Status) extends Config with Product with Serializable

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    Indicated to use the com.twitter.finagle.liveness.MockFailureDetector when creating a new detector

  3. case class Param(param: Config) extends Product with Serializable

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    Helper class for configuring a FailureDetector within a com.twitter.finagle.Stackable client

  4. case class ThresholdConfig(minPeriod: Duration = 5.seconds, threshold: Double = 2, windowSize: Int = 100, closeTimeout: Duration = 4.seconds) extends Config with Product with Serializable

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    Indicated to use the com.twitter.finagle.liveness.ThresholdFailureDetector configured with these values when creating a new detector.

    Indicated to use the com.twitter.finagle.liveness.ThresholdFailureDetector configured with these values when creating a new detector.

    The default windowSize and threshold are chosen from examining a representative ping distribution in a Twitter data center. With long tail distribution, we want a reasonably large window size to capture long RTTs in the history. A small threshold makes the detection sensitive to potential failures. There can be a low rate of false positive, which is fine in most production cases with cluster redundancy.

    closeTimeout allows a session to be closed when a ping response times out after 4 seconds. This allows sessions to be reestablished when there may be a networking issue, so that it can choose an alternative networking path instead. The default 4 seconds is pretty conservative regarding normal ping RTT.

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

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  2. final def ##(): Int

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  4. object GlobalFlagConfig extends Config with Product with Serializable

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    Default config type which tells the FailureDetector to extract config values from the sessionFailureDetector GlobalFlag.

  5. object NullConfig extends Config with Product with Serializable

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    Indicated to use the com.twitter.finagle.liveness.NullFailureDetector when creating a new detector

  6. object Param extends Product with Serializable

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