Module org.apache.jena.base

Package org.apache.jena.atlas.lib

Class CacheFactory

java.lang.Object

org.apache.jena.atlas.lib.CacheFactory

public class CacheFactory
extends Object

Constructor Summary

Constructors

Constructor	Description
CacheFactory()

Method Summary

Modifier and Type	Method	Description
static <Key, Value> Cache<Key,Value>	createCache(int maxSize)	Create a cache which has space for up to a certain number of objects.
static <Key, Value> Cache<Key,Value>	createCache(int maxSize, double initialCapacityFactor)
static <Key, Value> Cache<Key,Value>	createCache(int maxSize, BiConsumer<Key,Value> dropHandler)	Create a cache which has space for up to a certain number of objects.
static <Key, Value> Cache<Key,Value>	createCache(int maxSize, BiConsumer<Key,Value> dropHandler, double initialCapacityFactor)	Create a cache which has space for up to a certain number of objects and with a configurable initial capacity.
static <Obj> CacheSet<Obj>	createCacheSet(int size)	Create set-cache, rather than a map-cache.
static <Key, Value> Cache<Key,Value>	createNullCache()	Create a null cache.
static <Key, Value> Cache<Key,Value>	createOneSlotCache()	One slot cache
static <Key, Value> Cache<Key,Value>	createSimpleCache(int size)	Create a lightweight cache (e.g. slot replacement).
static <Obj> CacheSet<Obj>	createSync(CacheSet<Obj> cache)	Add a synchronization wrapper to an existing set-cache
static <Key, Value> Cache<Key,Value>	wrap(com.github.benmanes.caffeine.cache.Cache<Key,Value> caffeine)	Wrap an existing Caffeine cache

Methods inherited from class java.lang.Object

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

Constructor Details

CacheFactory

public CacheFactory()

Method Details

createCache

public static <Key,
Value> Cache<Key,Value> createCache(int maxSize)

Create a cache which has space for up to a certain number of objects. This is an LRU cache, or similar. The cache returns null for a cache miss. The cache is thread-safe for single operations.

createCache

public static <Key,
Value> Cache<Key,Value> createCache(int maxSize,
 BiConsumer<Key,Value> dropHandler)

Create a cache which has space for up to a certain number of objects. This is an LRU cache, or similar. The cache returns null for a cache miss. The cache is thread-safe for single operations.

createCache

public static <Key,
Value> Cache<Key,Value> createCache(int maxSize,
 double initialCapacityFactor)

createCache

public static <Key,
Value> Cache<Key,Value> createCache(int maxSize,
 BiConsumer<Key,Value> dropHandler,
 double initialCapacityFactor)

Create a cache which has space for up to a certain number of objects and with a configurable initial capacity.

wrap

public static <Key,
Value> Cache<Key,Value> wrap(com.github.benmanes.caffeine.cache.Cache<Key,Value> caffeine)

Wrap an existing Caffeine cache

createNullCache

public static <Key,
Value> Cache<Key,Value> createNullCache()

Create a null cache.

This cache never retains a value and always evaluates in Cache.getOrFill(Key, java.util.concurrent.Callable<Value>).

This cache is thread-safe.

createSimpleCache

public static <Key,
Value> Cache<Key,Value> createSimpleCache(int size)

Create a lightweight cache (e.g. slot replacement). This cache is not thread-safe.

createOneSlotCache

public static <Key,
Value> Cache<Key,Value> createOneSlotCache()

One slot cache

createCacheSet

public static <Obj> CacheSet<Obj> createCacheSet(int size)

Create set-cache, rather than a map-cache. The cache is thread-safe for single operations.

See Also:

• Pool

createSync

public static <Obj> CacheSet<Obj> createSync(CacheSet<Obj> cache)

Add a synchronization wrapper to an existing set-cache