org.apache.hadoop.yarn.util

Class TimelineServiceHelper

java.lang.Object

org.apache.hadoop.yarn.util.TimelineServiceHelper

@InterfaceAudience.LimitedPrivate(value={"MapReduce","YARN"})
public final class TimelineServiceHelper
extends Object

Helper class for Timeline service.

Method Summary

Modifier and Type	Method and Description
static long	invertLong(long key) Inverts the given key.
static <E,V> HashMap<E,V>	mapCastToHashMap(Map<E,V> originalMap) Cast map to HashMap for generic type.

Methods inherited from class java.lang.Object

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

Method Detail

mapCastToHashMap

public static <E,V> HashMap<E,V> mapCastToHashMap(Map<E,V> originalMap)

Cast map to HashMap for generic type.

Type Parameters:

E - key type

V - value type

Parameters:

originalMap - the map need to be casted

Returns:

casted HashMap object

invertLong

public static long invertLong(long key)

Inverts the given key.

Parameters:

key - value to be inverted .

Returns:

inverted long