jdbm.helper

Interface CachePolicyListener<T>

All Known Implementing Classes:

CacheRecordManager.CacheListener

public interface CachePolicyListener<T>

Callback interface between CachePolicy and a Cache implementation to notify about cached object eviction.

Note that CachePolicy implementations typically use object equality when removing listeners, so concrete implementations of this interface should also pay attention to their Object.equals(Object) and Object.hashCode() methods.

Method Summary

Modifier and Type	Method and Description
void	cacheObjectEvicted(T obj) Notification that the cache this listener is attached to is evicting the object indicated.

Method Detail

cacheObjectEvicted

void cacheObjectEvicted(T obj)
                 throws CacheEvictionException

Notification that the cache this listener is attached to is evicting the object indicated.

Parameters:

obj - object being evicted from cache

Throws:

CacheEvictionException - if this listener encountered problems while preparing for the specified object's eviction. For example, a listener may try to persist the object to disk, and encounter an IOException.