org.cache2k

Class AutoEntryRefreshController<T>

java.lang.Object

org.cache2k.AutoEntryRefreshController<T>

All Implemented Interfaces:

RefreshController<T>

Deprecated.

Use ValueWithExpiryTime.AUTO_EXPIRY

public final class AutoEntryRefreshController<T>
extends Object
implements RefreshController<T>

If object implements ValueWithNextRefreshTime then the next refresh time is fetched from the object. If not, the default linger time is used by the cache.

Author:

Jens Wilke; created: 2013-05-02

Field Summary

Fields

Modifier and Type	Field and Description
static AutoEntryRefreshController	INSTANCE Deprecated.

Constructor Summary

Constructors

Constructor and Description
AutoEntryRefreshController() Deprecated.

Method Summary

Methods

Modifier and Type	Method and Description
long	calculateNextRefreshTime(T _oldObject, T _newObject, long _timeOfLastRefresh, long now) Deprecated. Returns the time of next refresh (expiry time) in milliseconds since epoch.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INSTANCE

public static final AutoEntryRefreshController INSTANCE

Deprecated.

Constructor Detail

AutoEntryRefreshController

public AutoEntryRefreshController()

Deprecated.

Method Detail

calculateNextRefreshTime

public long calculateNextRefreshTime(T _oldObject,
                            T _newObject,
                            long _timeOfLastRefresh,
                            long now)

Deprecated.

Description copied from interface: RefreshController

Returns the time of next refresh (expiry time) in milliseconds since epoch. If 0 is returned, this means entry expires immediately, or is always fetched from the source. If Long.MAX_VALUE is returned it means there is no specific expiry time known or needed. In case a reasonable default can be assumed for the expiry, the cache will use the configured expiry time.

The cache may call the method a second (or more) times, if the expiry time needs a recalculation. The reason for this is to react on possible configuration changes properly. This may happen when an entry is read back from storage.

Specified by:

calculateNextRefreshTime in interface RefreshController<T>

Parameters:

_oldObject - the value currently in the cache. null if it is not in the cache, is a null value (null is supported for values) or the previous fetch operation yielded in an exception.

_newObject - the value which will be put in the cache.

_timeOfLastRefresh - time of the last cache refresh, by put or from the cache source.

now - this is the current time in millis. If a cache source was used to fetch the value, this is the time before the fetch was started.

Returns:

time of next refresh in millis. 0 if it should not be cached at all.