org.apache.jena.atlas.lib.cache

Class CacheGuava<K,V>

java.lang.Object

org.apache.jena.atlas.lib.cache.CacheGuava<K,V>

All Implemented Interfaces:

Cache<K,V>

public final class CacheGuava<K,V>
extends Object
implements Cache<K,V>

Wrapper around a shaded com.google.common.cache

Constructor Summary

Constructors

Constructor and Description
CacheGuava(int size)

Method Summary

Modifier and Type	Method and Description
void	clear()
boolean	containsKey(K key) Does the cache contain the key?
V	getIfPresent(K key) Get from cache - or return null.
V	getOrFill(K key, Callable<V> filler) Get from cache, of not present, call the Callable to try to fill the cache.
boolean	isEmpty()
Iterator<K>	keys() Iterate over all keys.
void	put(K key, V thing) Insert into the cache
void	remove(K key) Remove from cache - return true if key referenced an entry
void	setDropHandler(BiConsumer<K,V> dropHandler) Register a callback - called when an object is dropped from the cache (optional operation)
long	size() Current size of cache
org.apache.jena.ext.com.google.common.cache.CacheStats	stats()

Methods inherited from class java.lang.Object

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

Constructor Detail

CacheGuava

public CacheGuava(int size)

Method Detail

getOrFill

public V getOrFill(K key,
                   Callable<V> filler)

Description copied from interface: Cache

Get from cache, of not present, call the Callable to try to fill the cache. This operation should be atomic.

Specified by:

getOrFill in interface Cache<K,V>

getIfPresent

public V getIfPresent(K key)

Description copied from interface: Cache

Get from cache - or return null.

Specified by:

getIfPresent in interface Cache<K,V>

put

public void put(K key,
                V thing)

Description copied from interface: Cache

Insert into the cache

Specified by:

put in interface Cache<K,V>

containsKey

public boolean containsKey(K key)

Description copied from interface: Cache

Does the cache contain the key?

Specified by:

containsKey in interface Cache<K,V>

remove

public void remove(K key)

Description copied from interface: Cache

Remove from cache - return true if key referenced an entry

Specified by:

remove in interface Cache<K,V>

keys

public Iterator<K> keys()

Description copied from interface: Cache

Iterate over all keys. Iterating over the keys requires the caller be thread-safe.

Specified by:

keys in interface Cache<K,V>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Cache<K,V>

clear

public void clear()

Specified by:

clear in interface Cache<K,V>

size

public long size()

Description copied from interface: Cache

Current size of cache

Specified by:

size in interface Cache<K,V>

setDropHandler

public void setDropHandler(BiConsumer<K,V> dropHandler)

Description copied from interface: Cache

Register a callback - called when an object is dropped from the cache (optional operation)

Specified by:

setDropHandler in interface Cache<K,V>

stats

public org.apache.jena.ext.com.google.common.cache.CacheStats stats()