com.oracle.bmc.hdfs.caching

Interface Cache<K,V>

Type Parameters:

K - key type

V - value type

All Known Implementing Classes:

GuavaCache

public interface Cache<K,V>

A cache interface.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Cache.Loader<KK,VV> Loader to get the value for the key into the cache.
static interface	Cache.RemovalListener<KK,VV> Listener for removals from the cache.
static class	Cache.RemovalNotification<KK,VV> Notification of a removal from the cache.
static interface	Cache.Statistics Interface for providing cache statistics, if enabled.
static class	Cache.UncheckedExecutionException Exception was thrown while getting the cache value.
static interface	Cache.Weigher<KK,VV> Weigher for determining the weight of an entry.

Method Summary

Modifier and Type	Method and Description
ConcurrentMap<K,V>	asMap() Provide a view into the cache as a Map.
void	cleanUp() Run cache clean-up, e.g.
V	getIfPresent(K key) Get the value for the key if it exists in the cache, otherwise return null.
Cache.Statistics	getStatistics() Returns statistics, if enabled.
void	invalidate(K key) Invalidate a single cache entry.
void	invalidateAll() Invalidate all cache entries.
void	put(K key, V value) Put the value for the key into the cache.

Method Detail

getIfPresent

V getIfPresent(K key)

Get the value for the key if it exists in the cache, otherwise return null.

Parameters:

key - key

Returns:

value, or null if it didn't exist in the cache

put

void put(K key,
         V value)

Put the value for the key into the cache.

Parameters:

key - key

value - value

invalidateAll

void invalidateAll()

Invalidate all cache entries.

invalidate

void invalidate(K key)

Invalidate a single cache entry.

Parameters:

key - key for the entry to be invalidated

cleanUp

void cleanUp()

Run cache clean-up, e.g. to enforce sizes.

asMap

ConcurrentMap<K,V> asMap()

Provide a view into the cache as a Map.

Returns:

map

getStatistics

Cache.Statistics getStatistics()

Returns statistics, if enabled.

Returns:

statistics