Trait

com.twitter.finatra.kafkastreams.transformer.stores

PersistentTimers

Related Doc: package stores

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trait PersistentTimers extends OnWatermark with OnInit

Per-Key Persistent Timers inspired by Flink's ProcessFunction: https://ci.apache.org/projects/flink/flink-docs-stable/dev/stream/operators/process_function.html

Annotations
@Beta()
Note

Timers that fire at the same time MAY NOT fire in the order which they were added

,

Timers are based on a sorted RocksDB KeyValueStore

Linear Supertypes
OnInit, OnWatermark, AnyRef, Any
Known Subclasses
AggregatorTransformer, ReservoirSamplingTransformer
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Inherited
  1. PersistentTimers
  2. OnInit
  3. OnWatermark
  4. AnyRef
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Abstract Value Members

  1. abstract def getKeyValueStore[KK, VV](name: String)(implicit arg0: ClassTag[KK]): FinatraKeyValueStore[KK, VV]

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    Attributes
    protected

Concrete Value Members

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

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    Definition Classes
    AnyRef → Any

  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any

  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any

  5. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  6. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  7. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any

  8. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )

  9. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any

  10. def getPersistentTimerStore[TimerKey](timerStoreName: String, onTimer: (Time, TimerMetadata, TimerKey) ⇒ Unit, punctuationType: PunctuationType, maxTimerFiresPerWatermark: Int = 10000): PersistentTimerStore[TimerKey]

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    Creates a key-only timer store.

    Creates a key-only timer store. The timer store is implemented using a PersistentTimerValueStore, but the values stored are just zero-length byte arrays.

    TimerKey

    The type of the key for each timer

    timerStoreName

    The name of the timerstore

    onTimer

    A function that is called when the timer is triggered

    punctuationType

    Must be STREAM_TIME, WALL_CLOCK_TIME is not supported

    maxTimerFiresPerWatermark

    Maximum number of timers can can fire per watermark event

    Attributes
    protected

  11. def getPersistentTimerValueStore[TimerKey, TimerValue](timerStoreName: String, onTimer: (Time, TimerMetadata, TimerKey, TimerValue) ⇒ Unit, punctuationType: PunctuationType, maxTimerFiresPerWatermark: Int = 10000): PersistentTimerValueStore[TimerKey, TimerValue]

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    Creates a key/value timer store.

    Creates a key/value timer store. When addTimer is called on the timer store with a time, key, and value, a timer is stored in the store which triggered as the specified time. The specified onTimer function is then called with the key and value.

    TimerKey

    The type of the key for each timer

    TimerValue

    The type of the value stored for each timer

    timerStoreName

    The name of the timerstore, created seperately

    onTimer

    A function that is called when the timer is triggered

    punctuationType

    Must be STREAM_TIME, WALL_CLOCK_TIME is not supported

    maxTimerFiresPerWatermark

    Maximum number of timers can can fire per watermark event

    Attributes
    protected

  12. def hashCode(): Int

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    Definition Classes
    AnyRef → Any

  13. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any

  14. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef

  15. final def notify(): Unit

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    Definition Classes
    AnyRef

  16. final def notifyAll(): Unit

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    Definition Classes
    AnyRef

  17. def onInit(): Unit

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    Definition Classes
    PersistentTimers → OnInit

  18. final def onWatermark(watermark: Watermark): Unit

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    Definition Classes
    PersistentTimers → OnWatermark

  19. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef

  20. def toString(): String

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    Definition Classes
    AnyRef → Any

  21. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  22. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

  23. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from OnInit

Inherited from OnWatermark

Inherited from AnyRef

Inherited from Any

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