org.apache.hadoop.hbase.master.assignment

Enum ServerState

java.lang.Object

java.lang.Enum<ServerState>

org.apache.hadoop.hbase.master.assignment.ServerState

All Implemented Interfaces:

Serializable, Comparable<ServerState>

@InterfaceAudience.Private
public enum ServerState
extends Enum<ServerState>

Server State.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CRASHED Indicate that the server has crashed, i.e., we have already scheduled a SCP for it.
OFFLINE WAL splitting done.
ONLINE Initial state.
SPLITTING Server expired/crashed.
SPLITTING_META Only server which carries meta can have this state.
SPLITTING_META_DONE Indicate that the meta splitting is done.

Method Summary

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

ONLINE

public static final ServerState ONLINE

Initial state. Available.

CRASHED

public static final ServerState CRASHED

Indicate that the server has crashed, i.e., we have already scheduled a SCP for it.

SPLITTING_META

public static final ServerState SPLITTING_META

Only server which carries meta can have this state. We will split wal for meta and then assign meta first before splitting other wals.

SPLITTING_META_DONE

public static final ServerState SPLITTING_META_DONE

Indicate that the meta splitting is done. We need this state so that the UnassignProcedure for meta can safely quit. See the comments in UnassignProcedure.remoteCallFailed for more details.

SPLITTING

public static final ServerState SPLITTING

Server expired/crashed. Currently undergoing WAL splitting.

OFFLINE

public static final ServerState OFFLINE

WAL splitting done. This state will be used to tell the UnassignProcedure that it can safely quit. See the comments in UnassignProcedure.remoteCallFailed for more details.

Method Detail

values

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

Returns:

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

valueOf

public static ServerState 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