org.apache.hadoop.hdfs.server.common
Enum HdfsConstants.NamenodeRole

java.lang.Object
  extended by java.lang.Enum<HdfsConstants.NamenodeRole>
      extended by org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole
All Implemented Interfaces:
Serializable, Comparable<HdfsConstants.NamenodeRole>
Enclosing interface:
HdfsConstants

public static enum HdfsConstants.NamenodeRole
extends Enum<HdfsConstants.NamenodeRole>

Defines the NameNode role.


Enum Constant Summary
ACTIVE
           
BACKUP
           
CHECKPOINT
           
STANDBY
           
 
Method Summary
 String toString()
           
static HdfsConstants.NamenodeRole valueOf(String name)
          Returns the enum constant of this type with the specified name.
static HdfsConstants.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

ACTIVE

public static final HdfsConstants.NamenodeRole ACTIVE

BACKUP

public static final HdfsConstants.NamenodeRole BACKUP

CHECKPOINT

public static final HdfsConstants.NamenodeRole CHECKPOINT

STANDBY

public static final HdfsConstants.NamenodeRole STANDBY
Method Detail

values

public static HdfsConstants.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 (HdfsConstants.NamenodeRole c : HdfsConstants.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 HdfsConstants.NamenodeRole valueOf(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:
IllegalArgumentException - if this enum type has no constant with the specified name
NullPointerException - if the argument is null

toString

public String toString()
Overrides:
toString in class Enum<HdfsConstants.NamenodeRole>


Copyright © 2009 The Apache Software Foundation