Class

org.apache.spark.util

CollectionAccumulator

Related Doc: package util

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class CollectionAccumulator[T] extends AccumulatorV2[T, List[T]]

An accumulator for collecting a list of elements.

Source
AccumulatorV2.scala
Since

2.0.0

Linear Supertypes
AccumulatorV2[T, List[T]], Serializable, Serializable, AnyRef, Any
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Inherited
  1. CollectionAccumulator
  2. AccumulatorV2
  3. Serializable
  4. Serializable
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new CollectionAccumulator()

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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. def add(v: T): Unit

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    Takes the inputs and accumulates.

    Takes the inputs and accumulates. e.g. it can be a simple += for counter accumulator.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  5. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  6. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  7. def copy(): CollectionAccumulator[T]

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    Creates a new copy of this accumulator.

    Creates a new copy of this accumulator.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  8. def copyAndReset(): CollectionAccumulator[T]

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    Creates a new copy of this accumulator, which is zero value.

    Creates a new copy of this accumulator, which is zero value. i.e. call isZero on the copy must return true.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  9. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  10. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  11. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  12. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  13. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  14. final def id: Long

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    Returns the id of this accumulator, can only be called after registration.

    Returns the id of this accumulator, can only be called after registration.

    Definition Classes
    AccumulatorV2
  15. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  16. final def isRegistered: Boolean

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    Returns true if this accumulator has been registered.

    Returns true if this accumulator has been registered. Note that all accumulators must be registered before use, or it will throw exception.

    Definition Classes
    AccumulatorV2
  17. def isZero: Boolean

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    Returns if this accumulator is zero value or not.

    Returns if this accumulator is zero value or not. e.g. for a counter accumulator, 0 is zero value; for a list accumulator, Nil is zero value.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  18. def merge(other: AccumulatorV2[T, List[T]]): Unit

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    Merges another same-type accumulator into this one and update its state, i.e.

    Merges another same-type accumulator into this one and update its state, i.e. this should be merge-in-place.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  19. final def name: Option[String]

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    Returns the name of this accumulator, can only be called after registration.

    Returns the name of this accumulator, can only be called after registration.

    Definition Classes
    AccumulatorV2
  20. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  21. final def notify(): Unit

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    Definition Classes
    AnyRef
  22. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  23. def reset(): Unit

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    Resets this accumulator, which is zero value.

    Resets this accumulator, which is zero value. i.e. call isZero must return true.

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  24. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  25. def toString(): String

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    Definition Classes
    AccumulatorV2 → AnyRef → Any
  26. def value: List[T]

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    Defines the current value of this accumulator

    Defines the current value of this accumulator

    Definition Classes
    CollectionAccumulatorAccumulatorV2
  27. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  29. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  30. final def writeReplace(): Any

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    Attributes
    protected
    Definition Classes
    AccumulatorV2

Inherited from AccumulatorV2[T, List[T]]

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped