org.apache.ambari.server.state

Enum HostState

java.lang.Object

java.lang.Enum<HostState>

org.apache.ambari.server.state.HostState

All Implemented Interfaces:

Serializable, Comparable<HostState>

public enum HostState
extends Enum<HostState>

Enum Constant Summary

Enum Constants

Enum Constant and Description
HEALTHY State when the server is receiving heartbeats regularly from the Host and the state of the Host is healthy
HEARTBEAT_LOST State when the server has not received a heartbeat from the Host in the configured heartbeat expiry window.
INIT New host state
UNHEALTHY Host is in unhealthy state as reported either by the Host itself or via any other additional means ( monitoring layer )
WAITING_FOR_HOST_STATUS_UPDATES State when a registration request is received from the Host but the host has not responded to its status update check.

Method Summary

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

INIT

public static final HostState INIT

New host state

WAITING_FOR_HOST_STATUS_UPDATES

public static final HostState WAITING_FOR_HOST_STATUS_UPDATES

State when a registration request is received from the Host but the host has not responded to its status update check.

HEALTHY

public static final HostState HEALTHY

State when the server is receiving heartbeats regularly from the Host and the state of the Host is healthy

HEARTBEAT_LOST

public static final HostState HEARTBEAT_LOST

State when the server has not received a heartbeat from the Host in the configured heartbeat expiry window.

UNHEALTHY

public static final HostState UNHEALTHY

Host is in unhealthy state as reported either by the Host itself or via any other additional means ( monitoring layer )

Method Detail

values

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

Returns:

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

valueOf

public static HostState 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