CacheLoader (Off-Heap Cache)

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
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method 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