io.ray.streaming.api.partition

Interface Partition<T>

Type Parameters:

T - Type of the input data.

All Superinterfaces:

Function, Serializable

All Known Implementing Classes:

BroadcastPartition, ForwardPartition, KeyPartition, PythonPartition, RoundRobinPartition

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Partition<T>
extends Function

Interface of the partitioning strategy.

Method Summary

Modifier and Type	Method and Description
int[]	partition(T record, int numPartition) Given a record and downstream partitions, determine which partition(s) should receive the record.

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

loadCheckpoint, saveCheckpoint

Method Detail

partition

int[] partition(T record,
                int numPartition)

Given a record and downstream partitions, determine which partition(s) should receive the record.

Parameters:

record - The record.

numPartition - num of partitions

Returns:

IDs of the downstream partitions that should receive the record.