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

Enum Class Phase

java.lang.Object

java.lang.Enum<Phase>

org.apache.hadoop.hdfs.server.namenode.startupprogress.Phase

All Implemented Interfaces:

Serializable, Comparable<Phase>, Constable

@Private
public enum Phase
extends Enum<Phase>

Indicates a particular phase of the namenode startup sequence. The phases are listed here in their execution order.

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
LOADING_EDITS	The namenode is loading the edits file and applying its operations to the in-memory metadata.
LOADING_FSIMAGE	The namenode is loading the fsimage file into memory.
SAFEMODE	The namenode has entered safemode, awaiting block reports from data nodes.
SAVING_CHECKPOINT	The namenode is saving a new checkpoint.

Method Summary

Modifier and Type	Method	Description
String	getDescription()	Returns phase description.
String	getName()	Returns phase name.
static Phase	valueOf(String name)	Returns the enum constant of this class with the specified name.
static Phase[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

LOADING_FSIMAGE

public static final Phase LOADING_FSIMAGE

The namenode is loading the fsimage file into memory.

LOADING_EDITS

public static final Phase LOADING_EDITS

The namenode is loading the edits file and applying its operations to the in-memory metadata.

SAVING_CHECKPOINT

public static final Phase SAVING_CHECKPOINT

The namenode is saving a new checkpoint.

SAFEMODE

public static final Phase SAFEMODE

The namenode has entered safemode, awaiting block reports from data nodes.

Method Details

values

public static Phase[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

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

valueOf

public static Phase valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (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 class has no constant with the specified name

NullPointerException - if the argument is null

getDescription

public String getDescription()

Returns phase description.

Returns:

String description

getName

public String getName()

Returns phase name.

Returns:

String phase name