dk.heick.caching.persistences

Enum PersistencesRestoreMethod

java.lang.Object

java.lang.Enum<PersistencesRestoreMethod>

dk.heick.caching.persistences.PersistencesRestoreMethod

All Implemented Interfaces:

Serializable, Comparable<PersistencesRestoreMethod>

public enum PersistencesRestoreMethod
extends Enum<PersistencesRestoreMethod>

Enum constants that determines how persistent ValueManager shall try to restore their persisted cached values.

Author:

Frederik Heick

See Also:

ValueManager.isPersisted(), ValueManager.restore(dk.heick.caching.LRUCachingMap), LRUCachingMap.restoreCacheElement(Object, dk.heick.caching.AbstractValueWrapper, java.util.Date)

Enum Constant Summary

Enum Constants

Enum Constant and Description
DELETE_ALL Do not used any of the "old" caching value objects, be ensure that the "old" storage is cleaned up and the map remains empty after restore.
LOAD_ALL Load all values from the "old" storage and restoring the map with them, any cleanup will be performed by the "cleanup" method. Setting a new expiration time using the default value.
LOAD_WITHIN_EXPIRETIME Load only the values from "old" storage which you can determine that is below expireDateTime, reminder persisted values is removed. Using expiration time if can be determined from "object" otherwise use default value.
NOTHING No action is perform on the persistence storage and the map remains empty after restoring and any persisted values remains untouched. And any previous persisted object will remain in the "storage" untouched are someone else has to "deal" with those objects.

Method Summary

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

NOTHING

public static final PersistencesRestoreMethod NOTHING

No action is perform on the persistence storage and the map remains empty after restoring and any persisted values remains untouched.
And any previous persisted object will remain in the "storage" untouched are someone else has to "deal" with those objects.

DELETE_ALL

public static final PersistencesRestoreMethod DELETE_ALL

Do not used any of the "old" caching value objects, be ensure that the "old" storage is cleaned up and the map remains empty after restore.

LOAD_ALL

public static final PersistencesRestoreMethod LOAD_ALL

Load all values from the "old" storage and restoring the map with them, any cleanup will be performed by the "cleanup" method.
Setting a new expiration time using the default value.

LOAD_WITHIN_EXPIRETIME

public static final PersistencesRestoreMethod LOAD_WITHIN_EXPIRETIME

Load only the values from "old" storage which you can determine that is below expireDateTime, reminder persisted values is removed.
Using expiration time if can be determined from "object" otherwise use default value.

Method Detail

values

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

Returns:

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

valueOf

public static PersistencesRestoreMethod 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