org.castor.cache.hashbelt.reaper
Class RefreshingReaper<K,V>

java.lang.Object
  org.castor.cache.hashbelt.reaper.AbstractReaper<K,V>
      org.castor.cache.hashbelt.reaper.RefreshingReaper<K,V>

Type Parameters:

K - the type of keys maintained by this cache

V - the type of cached values

All Implemented Interfaces:

Reaper<K,V>

public abstract class RefreshingReaper<K,V>
extends AbstractReaper<K,V>

Calls a refresh method on each object in the container; it reinserts any returned object to the front of the expiration system. Useful for any object that needs to be periodically refreshed from source; you are free to return the same object that was called or to replace it with a refreshed version of that object.

Note that you must supply the implementation of the refresh method.

Since:

1.0

Version:

$Revision: 9040 $ $Date: 2011-08-16 08:26:59 +0200 (Di, 16 Aug 2011) $

Author:

Gregory Block

Constructor Summary

RefreshingReaper()

Method Summary

void	handleExpiredContainer(Container<K,V> expiredContainer) Methode called with a container that has expired before the container is garbage collected.
protected abstract V	refresh(V objectToBeRefreshed) Function called to attempt to refresh the object.

Methods inherited from class org.castor.cache.hashbelt.reaper.AbstractReaper

getCache, setCache

Methods inherited from class java.lang.Object

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

Constructor Detail

RefreshingReaper

public RefreshingReaper()

Method Detail

handleExpiredContainer

public final void handleExpiredContainer(Container<K,V> expiredContainer)

Methode called with a container that has expired before the container is garbage collected.

Parameters:

expiredContainer - The container that has expired.

refresh

protected abstract V refresh(V objectToBeRefreshed)

Function called to attempt to refresh the object. If refresh was successful, return the refreshed object; if not, return null.

Parameters:

objectToBeRefreshed - The object to be refreshed.

Returns:

The refreshed object, or null if the object could not be refreshed.