alluxio

Class DefaultStorageTierAssoc

java.lang.Object

alluxio.DefaultStorageTierAssoc

All Implemented Interfaces:

StorageTierAssoc

@ThreadSafe
public final class DefaultStorageTierAssoc
extends Object
implements StorageTierAssoc

Creates a two-way mapping between storage tier aliases and ordinal numbers from the given Configuration.

Constructor Summary

Constructors

Constructor and Description
DefaultStorageTierAssoc(List<String> storageTierAliases) Constructs a new instance using the given list of storage tier aliases in order of their position in the hierarchy.
DefaultStorageTierAssoc(PropertyKey levelsProperty, PropertyKey.Template template) Constructs a new instance using the given Configuration object.

Method Summary

Modifier and Type	Method and Description
String	getAlias(int ordinal)
List<String>	getOrderedStorageAliases()
int	getOrdinal(String alias)
List<Pair<BlockStoreLocation,BlockStoreLocation>>	intersectionList()
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultStorageTierAssoc

public DefaultStorageTierAssoc(PropertyKey levelsProperty,
                               PropertyKey.Template template)

Constructs a new instance using the given Configuration object. The mapping cannot be modified after creation.

Parameters:

levelsProperty - the property in the conf that specifies how many levels there are

template - the format for the conf that identifies the alias for each level

DefaultStorageTierAssoc

public DefaultStorageTierAssoc(List<String> storageTierAliases)

Constructs a new instance using the given list of storage tier aliases in order of their position in the hierarchy.

Parameters:

storageTierAliases - the list of aliases

Method Detail

getAlias

public String getAlias(int ordinal)

Specified by:

getAlias in interface StorageTierAssoc

Parameters:

ordinal - a storage tier ordinal

Returns:

the storage tier alias matching the given ordinal

getOrdinal

public int getOrdinal(String alias)

Specified by:

getOrdinal in interface StorageTierAssoc

Parameters:

alias - a storage tier alias

Returns:

the storage tier ordinal matching the given alias

size

public int size()

Specified by:

size in interface StorageTierAssoc

Returns:

the size of the alias-ordinal mapping

getOrderedStorageAliases

public List<String> getOrderedStorageAliases()

Specified by:

getOrderedStorageAliases in interface StorageTierAssoc

Returns:

a list of storage tier aliases in order of their ordinal value

intersectionList

public List<Pair<BlockStoreLocation,BlockStoreLocation>> intersectionList()

Specified by:

intersectionList in interface StorageTierAssoc

Returns:

list of intersections between tier levels