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* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package com.sun.tools.visualvm.api.caching;
/**
* An interface for cache
* <p>
* A cache is basically a map that can evict its entries according to defined TTL
* or as a result of the user action
* @author Jaroslav Bachorik
*/
abstract public class Cache<K,V> {
/**
* Retrieves an object from the cache by the given key<br/>
* If there is no cached version of the object {@linkplain #cacheMiss(java.lang.Object) } is invoked
* <p>
* To obtain a cache one needs to call one of {@linkplain CacheFactory} methods
* </p>
* @param key The key identifying the object to be retrieved
* @return Returns the cached object or NULL
*/
abstract public V retrieveObject(K key);
abstract public V invalidateObject(K key);
/**
* Property getter
* @return Returns TTL interval in milliseconds
*/
abstract public long getTTL();
/**
* Property setter
* @param ttl TTL interval in milliseconds
*/
abstract public void setTTL(long ttl);
}