Package org.apache.hadoop.fs.impl.prefetch

Enum BufferData.State

java.lang.Object

java.lang.Enum<BufferData.State>

org.apache.hadoop.fs.impl.prefetch.BufferData.State

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<BufferData.State>

Enclosing class:

BufferData

public static enum BufferData.State
extends java.lang.Enum<BufferData.State>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BLANK	Buffer has been acquired but has no data.
CACHING	This block is being added to the local cache.
DONE	This block is no longer in-use and should not be used once in this state.
PREFETCHING	This block is being prefetched.
READY	This block has data and is ready to be read.
UNKNOWN	Unknown / invalid state.

Method Summary

Modifier and Type	Method	Description
static BufferData.State	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static BufferData.State[]	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

UNKNOWN

public static final BufferData.State UNKNOWN

Unknown / invalid state.

BLANK

public static final BufferData.State BLANK

Buffer has been acquired but has no data.

PREFETCHING

public static final BufferData.State PREFETCHING

This block is being prefetched.

CACHING

public static final BufferData.State CACHING

This block is being added to the local cache.

READY

public static final BufferData.State READY

This block has data and is ready to be read.

DONE

public static final BufferData.State DONE

This block is no longer in-use and should not be used once in this state.

Method Detail

values

public static BufferData.State[] 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 (BufferData.State c : BufferData.State.values())
    System.out.println(c);

Returns:

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

valueOf

public static BufferData.State 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