org.rhq.enterprise.server.alert.engine.model

Enum CacheElementActivity

java.lang.Object

java.lang.Enum<CacheElementActivity>

org.rhq.enterprise.server.alert.engine.model.CacheElementActivity

All Implemented Interfaces:

Serializable, Comparable<CacheElementActivity>

public enum CacheElementActivity
extends Enum<CacheElementActivity>

Describes the activity state of an alert condition cache element. Because the cache is stateless, we cannot have just "active" and "inactive", because when the cache is reloaded, we really don't know the prior activity state.

Therefore we introduce a 3rd state, unknown, that for all purposes behaves exactly like active but we keep it anyway for clarity reasons.

When a cache is reloaded, the activity of all its elements is initially unknown and then flips from active to inactive based on condition evaluations.

Since:

4.10.0

Author:

Lukas Krejci

Enum Constant Summary

Enum Constants

Enum Constant and Description
ACTIVE
INACTIVE
UNKNOWN

Method Summary

Methods

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

UNKNOWN

public static final CacheElementActivity UNKNOWN

ACTIVE

public static final CacheElementActivity ACTIVE

INACTIVE

public static final CacheElementActivity INACTIVE

Method Detail

values

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

Returns:

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

valueOf

public static CacheElementActivity 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

maybeActive

public boolean maybeActive()