org.nerd4j.utils.cache

Interface DataProvider<V>

Type Parameters:

V - type of the data to retrieve.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface DataProvider<V>

Represents a provider able to retrieve the values to cache in relation with the given key.

The assumption behind this interface is that the given key is able to uniquely identify the related data and therefore contains all the information needed to retrieve it.

This is a functional interface and therefore is intended to be implemented using Java8 Lambdas. The throws Exception in the retrieve(CacheKey) methods allows the implementations to throw any type of exception.

Since:

2.0.0

Author:

Massimo Coluzzi

Method Summary

Modifier and Type	Method and Description
V	retrieve(CacheKey key) Returns the data to cache in relation with the given key.

Method Detail

retrieve

V retrieve(CacheKey key)
    throws Exception

Returns the data to cache in relation with the given key.

Parameters:

key - key to cache.

Returns:

the data to cache.

Throws:

Exception - depends on the implementation.