org.springframework.data.hadoop.store.partition

Interface PartitionKeyResolver<T,K>

Type Parameters:

T - the type of an entity to write

K - the type of a partition key

public interface PartitionKeyResolver<T,K>

A PartitionKeyResolver is a strategy interface defining entity is automatically translated into a matching partition key.

Author:

Janne Valkealahti

Method Summary

Methods

Modifier and Type	Method and Description
K	resolvePartitionKey(T entity) Resolve partition key for a given entity.

Method Detail

resolvePartitionKey

K resolvePartitionKey(T entity)

Resolve partition key for a given entity. This method may return NULL indicating that there are no partition key available.

Parameters:

entity - the entity

Returns:

the partition key