Packages

c

org.apache.spark

Aggregator

case class Aggregator[K, V, C](createCombiner: (V) => C, mergeValue: (C, V) => C, mergeCombiners: (C, C) => C) extends Product with Serializable

:: DeveloperApi :: A set of functions used to aggregate data.

createCombiner

function to create the initial value of the aggregation.

mergeValue

function to merge a new value into the aggregation result.

mergeCombiners

function to merge outputs from multiple mergeValue function.

Annotations
@DeveloperApi()
Source
Aggregator.scala
Linear Supertypes
Serializable, Product, Equals, AnyRef, Any
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Inherited
  1. Aggregator
  2. Serializable
  3. Product
  4. Equals
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new Aggregator(createCombiner: (V) => C, mergeValue: (C, V) => C, mergeCombiners: (C, C) => C)

    createCombiner

    function to create the initial value of the aggregation.

    mergeValue

    function to merge a new value into the aggregation result.

    mergeCombiners

    function to merge outputs from multiple mergeValue function.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
  6. def combineCombinersByKey(iter: Iterator[_ <: Product2[K, C]], context: TaskContext): Iterator[(K, C)]
  7. def combineValuesByKey(iter: Iterator[_ <: Product2[K, V]], context: TaskContext): Iterator[(K, C)]
  8. val createCombiner: (V) => C
  9. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  10. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @IntrinsicCandidate() @native()
  11. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  12. val mergeCombiners: (C, C) => C
  13. val mergeValue: (C, V) => C
  14. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  15. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  16. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @IntrinsicCandidate() @native()
  17. def productElementNames: Iterator[String]
    Definition Classes
    Product
  18. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  19. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  20. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  21. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

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