Aggregator

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

def combineCombinersByKey(iter: Iterator[(K, C)], context: TaskContext): Iterator[(K, C)]

def combineValuesByKey(iter: Iterator[_ <: Product2[K, V]], context: TaskContext): Iterator[(K, C)]

val createCombiner: (V) ⇒ C

function to create the initial value of the aggregation.

final def eq(arg0: AnyRef): Boolean

def finalize(): Unit

final def getClass(): Class[_]

final def isInstanceOf[T0]: Boolean

val mergeCombiners: (C, C) ⇒ C

function to merge outputs from multiple mergeValue function.

val mergeValue: (C, V) ⇒ C

function to merge a new value into the aggregation result.

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

final def wait(): Unit

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

final def wait(arg0: Long): Unit

def combineCombinersByKey(iter: Iterator[(K, C)]): Iterator[(K, C)]

def combineValuesByKey(iter: Iterator[_ <: Product2[K, V]]): Iterator[(K, C)]