Package org.apache.hadoop.hdfs.server.common

Enum HdfsServerConstants.NamenodeRole

java.lang.Object

java.lang.Enum<HdfsServerConstants.NamenodeRole>

org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NamenodeRole

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<HdfsServerConstants.NamenodeRole>

Enclosing interface:

HdfsServerConstants

public static enum HdfsServerConstants.NamenodeRole
extends java.lang.Enum<HdfsServerConstants.NamenodeRole>

Defines the NameNode role.

Enum Constant Summary

Enum Constants

Enum Constant	Description
BACKUP
CHECKPOINT
NAMENODE

Method Summary

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

NAMENODE

public static final HdfsServerConstants.NamenodeRole NAMENODE

BACKUP

public static final HdfsServerConstants.NamenodeRole BACKUP

CHECKPOINT

public static final HdfsServerConstants.NamenodeRole CHECKPOINT

Method Detail

values

public static HdfsServerConstants.NamenodeRole[] 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 (HdfsServerConstants.NamenodeRole c : HdfsServerConstants.NamenodeRole.values())
    System.out.println(c);

Returns:

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

valueOf

public static HdfsServerConstants.NamenodeRole 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

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Enum<HdfsServerConstants.NamenodeRole>