Package org.apache.juneau.internal

Class Cache<K,V>

java.lang.Object

org.apache.juneau.internal.Cache<K,V>

Type Parameters:

K - The key type.

V - The value type.

public class Cache<K,V>
extends Object

Simple in-memory cache of objects.

Essentially just a wrapper around a ConcurrentHashMap.

See Also:

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Cache.Builder<K,V>	Builder class.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Cache(Cache.Builder<K,V> builder)	Constructor

Method Summary

Modifier and Type	Method	Description
V	get(K key, Supplier<V> supplier)	Retrieves the value with the specified key from this cache.
static <K, V> Cache.Builder<K,V>	of(Class<K> key, Class<V> type)	Static creator.

Methods inherited from class java.lang.Object

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

Constructor Details

Cache

protected Cache(Cache.Builder<K,V> builder)

Constructor

Parameters:

builder - The builder for this object.

Method Details

of

public static <K,
V> Cache.Builder<K,V> of(Class<K> key,
 Class<V> type)

Static creator.

Type Parameters:

K - The key type.

V - The value type.

Parameters:

key - The key type.

type - The value type.

Returns:

A new builder for this object.

get

public V get(K key,
 Supplier<V> supplier)

Retrieves the value with the specified key from this cache.

Parameters:

key - The key.

supplier - The supplier for creating this object if it's not found in the cache.

Returns:

The value.