Package org.apache.hadoop.hdfs.server.federation.resolver.order

Class HashFirstResolver

java.lang.Object

org.apache.hadoop.hdfs.server.federation.resolver.order.HashResolver

org.apache.hadoop.hdfs.server.federation.resolver.order.HashFirstResolver

All Implemented Interfaces:

OrderedResolver

public class HashFirstResolver
extends HashResolver

Variation of HashResolver that only uses the first level of the path.

Field Summary

Fields inherited from class org.apache.hadoop.hdfs.server.federation.resolver.order.HashResolver

LOG

Constructor Summary

Constructors

Constructor	Description
HashFirstResolver()

Method Summary

Modifier and Type	Method	Description
String	getFirstNamespace(String path, PathLocation loc)	Use the result from consistent hashing locator to prioritize the locations for a path.

Methods inherited from class org.apache.hadoop.hdfs.server.federation.resolver.order.HashResolver

extractTempFileName

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

HashFirstResolver

public HashFirstResolver()

Method Details

getFirstNamespace

public String getFirstNamespace(String path,
 PathLocation loc)

Description copied from class: HashResolver

Use the result from consistent hashing locator to prioritize the locations for a path.

Specified by:

getFirstNamespace in interface OrderedResolver

Overrides:

getFirstNamespace in class HashResolver

Parameters:

path - Path to check.

loc - Federated location with multiple destinations.

Returns:

First namespace based on hash.