Loader (eXo PLF:: Kernel :: Component :: Cache Service 6.2.2 API)

Type Parameters:

K - the key type parameter

V - the value type parameter

C - the context type parameter
```
public interface Loader<K,V,C>
```
The loader interface is used by the future cache to retrieves the value from the key when it does not exist.

Version:

$Revision$

Author:

Julien Viet

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  V retrieve(C context, K key)
  Retrieves the value from the key within the specified context.

- Method Detail
  - retrieve
```
V retrieve(C context,
           K key)
    throws Exception
```
    Retrieves the value from the key within the specified context. If the resource is not found then the value null must be returned.
    
    Parameters:
    
    context - the context
    
    key - the key
    
    Returns:
    
    the value
    
    Throws:
    
    Exception - any exception that would prevent the value to be loaded