io.ray.streaming.api.function.impl

Interface AggregateFunction<I,A,O>

Type Parameters:

I - Type of the input data.

A - Type of the intermediate data.

O - Type of the output data.

All Superinterfaces:

Function, Serializable

public interface AggregateFunction<I,A,O>
extends Function

Interface of aggregate functions.

Method Summary

Modifier and Type	Method and Description
void	add(I value, A accumulator)
A	createAccumulator()
O	getResult(A accumulator)
A	merge(A a, A b)
void	retract(A acc, I value)

Methods inherited from interface io.ray.streaming.api.function.Function

loadCheckpoint, saveCheckpoint

Method Detail

createAccumulator

A createAccumulator()

add

void add(I value,
         A accumulator)

getResult

O getResult(A accumulator)

merge

A merge(A a,
        A b)

retract

void retract(A acc,
             I value)