alluxio

Class StorageTierAssoc

java.lang.Object

alluxio.StorageTierAssoc

Direct Known Subclasses:

MasterStorageTierAssoc, WorkerStorageTierAssoc

@ThreadSafe
public abstract class StorageTierAssoc
extends Object

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

Constructor Summary

Constructors

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

Method Summary

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

Methods inherited from class java.lang.Object

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

Constructor Detail

StorageTierAssoc

protected StorageTierAssoc(PropertyKey levelsProperty,
                           PropertyKey.Template template)

Constructs a new instance using the given ServerConfiguration 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

StorageTierAssoc

protected StorageTierAssoc(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)

Parameters:

ordinal - a storage tier ordinal

Returns:

the storage tier alias matching the given ordinal

getOrdinal

public int getOrdinal(String alias)

Parameters:

alias - a storage tier alias

Returns:

the storage tier ordinal matching the given alias

size

public int size()

Returns:

the size of the alias-ordinal mapping

getOrderedStorageAliases

public List<String> getOrderedStorageAliases()

Returns:

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