org.caffinitas.ohc

Interface CacheLoader<K,V>

Type Parameters:

K - type of the cache key

V - type of the cache value

public interface CacheLoader<K,V>

Implementation to load values for cache entries using getWithLoader or OHCache.getWithLoaderAsync(Object, CacheLoader) getWithLoaderAsynd}.

Method Summary

Modifier and Type	Method and Description
V	load(K key) Cache loaders implement this method and return a non-null value on success.

Method Detail

load

V load(K key)
throws PermanentLoadException,
       Exception

Cache loaders implement this method and return a non-null value on success. null can be returned to indicate that the no value for the requested key could be found.

Permanent failures in loading a specific key can be indicated by throwing a PermanentLoadException. Other exceptions indicate a temporary failure.

Parameters:

key - key for the value to load. Always non-null

Returns:

non-null value on success or null if it could not find a value.

Throws:

PermanentLoadException - can be thrown by the loader implementation to indicate that is will never succeed in finding a value for the requested key.

Exception - any exception other than PermanentLoadException can be thrown by the loader implementation to indicate a temporary failure in loading the value