com.google.common.cache
Class CacheLoader<K,V>

java.lang.Object
  com.google.common.cache.CacheLoader<K,V>

@Beta
public abstract class CacheLoader<K,V>
extends Object

Computes or retrieves values, based on a key, for use in populating a Cache.

Since:

10.0

Author:

Charles Fry

Constructor Summary

CacheLoader()

Method Summary

static <K,V> CacheLoader<K,V>	from(Function<K,V> function) Returns a CacheLoader which creates values by applying a Function to the key.
static <V> CacheLoader<Object,V>	from(Supplier<V> supplier) Returns a CacheLoader which obtains values from a Supplier (independent of the key).
abstract V	load(K key) Computes or retrieves the value corresponding to key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CacheLoader

public CacheLoader()

Method Detail

from

public static <K,V> CacheLoader<K,V> from(Function<K,V> function)

Returns a CacheLoader which creates values by applying a Function to the key.

from

public static <V> CacheLoader<Object,V> from(Supplier<V> supplier)

Returns a CacheLoader which obtains values from a Supplier (independent of the key).

load

public abstract V load(K key)
                throws Exception

Computes or retrieves the value corresponding to key.

Parameters:

key - the key whose value should be loaded; will never be null

Returns:

the value associated with key; may not be null

Throws:

Exception