Package org.apache.hadoop.hdfs.server.namenode

Enum NNStorage.NameNodeDirType

java.lang.Object

java.lang.Enum<NNStorage.NameNodeDirType>

org.apache.hadoop.hdfs.server.namenode.NNStorage.NameNodeDirType

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<NNStorage.NameNodeDirType>, Storage.StorageDirType

Enclosing class:

NNStorage

@VisibleForTesting
public static enum NNStorage.NameNodeDirType
extends java.lang.Enum<NNStorage.NameNodeDirType>
implements Storage.StorageDirType

Implementation of StorageDirType specific to namenode storage A Storage directory could be of type IMAGE which stores only fsimage, or of type EDITS which stores edits or of type IMAGE_AND_EDITS which stores both fsimage and edits.

Enum Constant Summary

Enum Constants

Enum Constant	Description
EDITS
IMAGE
IMAGE_AND_EDITS
UNDEFINED

Method Summary

Modifier and Type	Method	Description
Storage.StorageDirType	getStorageDirType()
boolean	isOfType(Storage.StorageDirType type)
static NNStorage.NameNodeDirType	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static NNStorage.NameNodeDirType[]	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

UNDEFINED

public static final NNStorage.NameNodeDirType UNDEFINED

IMAGE

public static final NNStorage.NameNodeDirType IMAGE

EDITS

public static final NNStorage.NameNodeDirType EDITS

IMAGE_AND_EDITS

public static final NNStorage.NameNodeDirType IMAGE_AND_EDITS

Method Detail

values

public static NNStorage.NameNodeDirType[] 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 (NNStorage.NameNodeDirType c : NNStorage.NameNodeDirType.values())
    System.out.println(c);

Returns:

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

valueOf

public static NNStorage.NameNodeDirType 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

getStorageDirType

public Storage.StorageDirType getStorageDirType()

Specified by:

getStorageDirType in interface Storage.StorageDirType

isOfType

public boolean isOfType(Storage.StorageDirType type)

Specified by:

isOfType in interface Storage.StorageDirType