org.onosproject.store.hz

Class AbsentInvalidatingLoadingCache<K,V>

java.lang.Object

com.google.common.collect.ForwardingObject

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

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

com.google.common.cache.ForwardingLoadingCache.SimpleForwardingLoadingCache<K,com.google.common.base.Optional<V>>

org.onosproject.store.hz.AbsentInvalidatingLoadingCache<K,V>

Type Parameters:

K - Cache key type

V - Cache value type. (Optional<V>)

All Implemented Interfaces:

com.google.common.base.Function<K,com.google.common.base.Optional<V>>, com.google.common.cache.Cache<K,com.google.common.base.Optional<V>>, com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>>

public class AbsentInvalidatingLoadingCache<K,V>
extends com.google.common.cache.ForwardingLoadingCache.SimpleForwardingLoadingCache<K,com.google.common.base.Optional<V>>

Wrapper around LoadingCache to handle negative hit scenario.

When the LoadingCache returned Absent, this implementation will invalidate the entry immediately to avoid caching negative hits.

Nested Class Summary

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

com.google.common.cache.ForwardingLoadingCache.SimpleForwardingLoadingCache<K,V>

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

com.google.common.cache.ForwardingCache.SimpleForwardingCache<K,V>

Constructor Summary

Constructors

Constructor and Description
AbsentInvalidatingLoadingCache(com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>> delegate) Constructor.

Method Summary

Modifier and Type	Method and Description
com.google.common.base.Optional<V>	apply(K key)
com.google.common.base.Optional<V>	get(K key)
com.google.common.base.Optional<V>	get(K key, Callable<? extends com.google.common.base.Optional<V>> valueLoader)
com.google.common.base.Optional<V>	getIfPresent(Object key)
com.google.common.base.Optional<V>	getUnchecked(K key)

Methods inherited from class com.google.common.cache.ForwardingLoadingCache.SimpleForwardingLoadingCache

delegate

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

getAll, refresh

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

asMap, cleanUp, getAllPresent, invalidate, invalidateAll, invalidateAll, put, putAll, size, stats

Methods inherited from class com.google.common.collect.ForwardingObject

toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.google.common.cache.LoadingCache

asMap

Methods inherited from interface com.google.common.cache.Cache

cleanUp, getAllPresent, invalidate, invalidateAll, invalidateAll, put, putAll, size, stats

Methods inherited from interface com.google.common.base.Function

equals

Constructor Detail

AbsentInvalidatingLoadingCache

public AbsentInvalidatingLoadingCache(com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>> delegate)

Constructor.

Parameters:

delegate - actual LoadingCache to delegate loading.

Method Detail

get

public com.google.common.base.Optional<V> get(K key)
                                       throws ExecutionException

Specified by:

get in interface com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>>

Overrides:

get in class com.google.common.cache.ForwardingLoadingCache<K,com.google.common.base.Optional<V>>

Throws:

ExecutionException

getUnchecked

public com.google.common.base.Optional<V> getUnchecked(K key)

Specified by:

getUnchecked in interface com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>>

Overrides:

getUnchecked in class com.google.common.cache.ForwardingLoadingCache<K,com.google.common.base.Optional<V>>

apply

public com.google.common.base.Optional<V> apply(K key)

Specified by:

apply in interface com.google.common.base.Function<K,com.google.common.base.Optional<V>>

Specified by:

apply in interface com.google.common.cache.LoadingCache<K,com.google.common.base.Optional<V>>

Overrides:

apply in class com.google.common.cache.ForwardingLoadingCache<K,com.google.common.base.Optional<V>>

getIfPresent

public com.google.common.base.Optional<V> getIfPresent(Object key)

Specified by:

getIfPresent in interface com.google.common.cache.Cache<K,com.google.common.base.Optional<V>>

Overrides:

getIfPresent in class com.google.common.cache.ForwardingCache<K,com.google.common.base.Optional<V>>

get

public com.google.common.base.Optional<V> get(K key,
                                              Callable<? extends com.google.common.base.Optional<V>> valueLoader)
                                       throws ExecutionException

Specified by:

get in interface com.google.common.cache.Cache<K,com.google.common.base.Optional<V>>

Overrides:

get in class com.google.common.cache.ForwardingCache<K,com.google.common.base.Optional<V>>

Throws:

ExecutionException