org.jclouds.cache.internal

Class BackoffExponentiallyAndRetryOnThrowableCacheLoader<K,V>

java.lang.Object

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

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

org.jclouds.cache.internal.BackoffExponentiallyAndRetryOnThrowableCacheLoader<K,V>

Type Parameters:

K - the key type of the cache loader

V - the value type of the cache loader

@Beta
public class BackoffExponentiallyAndRetryOnThrowableCacheLoader<K,V>
extends ForwardingCacheLoader<K,V>

Exponentially backs off, if we encounter an exception of the given type during any of the following methods:

• load
• reload
• loadAll

Since:

1.5

Author:

Adrian Cole

Nested Class Summary

Nested classes/interfaces inherited from class org.jclouds.cache.ForwardingCacheLoader

ForwardingCacheLoader.SimpleForwardingCacheLoader<K,V>

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

com.google.common.cache.CacheLoader.InvalidCacheLoadException

Constructor Summary

Constructors

Constructor and Description
BackoffExponentiallyAndRetryOnThrowableCacheLoader(Class<? extends Throwable> retryableThrowable, long periodMs, long maxPeriodMs, int maxTries, com.google.common.cache.CacheLoader<K,V> loader)

Method Summary

Methods

Modifier and Type	Method and Description
protected 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

BackoffExponentiallyAndRetryOnThrowableCacheLoader

public BackoffExponentiallyAndRetryOnThrowableCacheLoader(Class<? extends Throwable> retryableThrowable,
                                                  long periodMs,
                                                  long maxPeriodMs,
                                                  int maxTries,
                                                  com.google.common.cache.CacheLoader<K,V> loader)

Parameters:

retryableThrowable - the exception which we can retry

periodMs - initial period, which exponentially increases with each try, specified in milliseconds

maxPeriodMs - maximum period duration, specified in milliseconds

maxTries - maximum amount of tries

loader - the loader we are able to retry

Method Detail

delegate

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

Specified by:

delegate in class ForwardingCacheLoader<K,V>

load

public V load(K key)
       throws Exception

Overrides:

load in class ForwardingCacheLoader<K,V>

Throws:

Exception

reload

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

Overrides:

reload in class ForwardingCacheLoader<K,V>

Throws:

Exception

loadAll

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

Overrides:

loadAll in class ForwardingCacheLoader<K,V>

Throws:

Exception