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

Enum DestinationOrder

java.lang.Object

java.lang.Enum<DestinationOrder>

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

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<DestinationOrder>

public enum DestinationOrder
extends java.lang.Enum<DestinationOrder>

Order of the destinations when we have multiple of them. When the resolver of files to subclusters (FileSubclusterResolver) has multiple destinations, this determines which location should be checked first.

Enum Constant Summary

Enum Constants

Enum Constant	Description
HASH
HASH_ALL
LOCAL
RANDOM
SPACE

Field Summary

Fields

Modifier and Type	Field	Description
static java.util.EnumSet<DestinationOrder>	FOLDER_ALL	Approaches that write folders in all subclusters.

Method Summary

Modifier and Type	Method	Description
static DestinationOrder	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static DestinationOrder[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

HASH

public static final DestinationOrder HASH

LOCAL

public static final DestinationOrder LOCAL

RANDOM

public static final DestinationOrder RANDOM

HASH_ALL

public static final DestinationOrder HASH_ALL

SPACE

public static final DestinationOrder SPACE

Field Detail

FOLDER_ALL

public static final java.util.EnumSet<DestinationOrder> FOLDER_ALL

Approaches that write folders in all subclusters.

Method Detail

values

public static DestinationOrder[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (DestinationOrder c : DestinationOrder.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DestinationOrder valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null