org.jclouds.cache
Class ForwardingCacheLoader<K,V>

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

Direct Known Subclasses:

BackoffExponentiallyAndRetryOnThrowableCacheLoader, ForwardingCacheLoader.SimpleForwardingCacheLoader

@Beta
public abstract class ForwardingCacheLoader<K,V>
extends com.google.common.cache.CacheLoader<K,V>

A ForwardingCacheLoader.SimpleForwardingCacheLoader which forwards all its method calls to another ForwardingCacheLoader.SimpleForwardingCacheLoader. Subclasses should override one or more methods to modify the behavior of the backing cache as desired per the decorator pattern.

Since:

1.5

Author:

Adrian Cole

Nested Class Summary

static class

ForwardingCacheLoader.SimpleForwardingCacheLoader<K,V> A simplified version of ForwardingCacheLoader where subclasses can pass in an already constructed CacheLoader as the delegate.

Nested classes/interfaces inherited from class com.google.common.cache.CacheLoader

com.google.common.cache.CacheLoader.InvalidCacheLoadException

Constructor Summary

protected

ForwardingCacheLoader() Constructor for use by subclasses.

Method Summary

protected abstract com.google.common.cache.CacheLoader<K,V>	delegate()
V	load(K key)
Map<K,V>	loadAll(Iterable<? extends K> keys)
com.google.common.util.concurrent.ListenableFuture<V>	reload(K key, V oldValue)

Methods inherited from class com.google.common.cache.CacheLoader

from, from

Methods inherited from class java.lang.Object

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

Constructor Detail

ForwardingCacheLoader

protected ForwardingCacheLoader()

Constructor for use by subclasses.

Method Detail

delegate

protected abstract com.google.common.cache.CacheLoader<K,V> delegate()

load

public V load(K key)
       throws Exception

Specified by:

load in class com.google.common.cache.CacheLoader<K,V>

Throws:

Exception

reload

public com.google.common.util.concurrent.ListenableFuture<V> reload(K key,
                                                                    V oldValue)
                                                             throws Exception

Overrides:

reload in class com.google.common.cache.CacheLoader<K,V>

Throws:

Exception

loadAll

public Map<K,V> loadAll(Iterable<? extends K> keys)
                 throws Exception

Overrides:

loadAll in class com.google.common.cache.CacheLoader<K,V>

Throws:

Exception