alluxio.client.block.policy

Interface BlockLocationPolicy

All Known Implementing Classes:

CapacityBaseRandomPolicy, DeterministicHashPolicy, LocalFirstAvoidEvictionPolicy, LocalFirstPolicy, MostAvailableFirstPolicy, RoundRobinPolicy, SpecificHostPolicy

@PublicApi
public interface BlockLocationPolicy

Interface for determining the Alluxio worker location to serve a block write or UFS block read.

FileInStream uses this to determine where to read a UFS block.

A policy must have an empty constructor to be used as default policy.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	BlockLocationPolicy.Factory The factory for the BlockLocationPolicy.

Method Summary

Modifier and Type	Method and Description
java.util.Optional<WorkerNetAddress>	getWorker(GetWorkerOptions options) Gets the worker's network address for serving operations requested for the block.

Method Detail

getWorker

java.util.Optional<WorkerNetAddress> getWorker(GetWorkerOptions options)

Gets the worker's network address for serving operations requested for the block.

Parameters:

options - the options to get a block worker network address for a block

Returns:

the address of the worker to write to, or empty if no worker can be selected