com.caucho.util

Class TimedCache<K,V>

java.lang.Object

com.caucho.util.TimedCache<K,V>

public class TimedCache<K,V>
extends java.lang.Object

A timed LRU cache. Items remain valid until they expire. TimedCache can simplify database caching.

 TimedCache storyCache = new TimedCache(30, 60000);

 public Story getCurrentStory(String id)
 {
   Story story = (Story) storyCache.get(id);

   if (story == null) {
     story = DB.queryStoryDatabase(id);
     storyCache.put(id, story);
   }

   return story;
 }
 

Constructor Summary

Constructors

Constructor and Description
TimedCache(int capacity, long expireInterval) Creates a new timed LRU cache.

Method Summary

Modifier and Type	Method and Description
V	get(K key) Gets an item from the cache, returning null if expired.
V	put(K key, V value) Put a new item in the cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

TimedCache

public TimedCache(int capacity,
                  long expireInterval)

Creates a new timed LRU cache.

Parameters:

capacity - the maximum size of the LRU cache

expireInterval - the time an entry remains valid

Method Detail

put

public V put(K key,
             V value)

Put a new item in the cache.

get

public V get(K key)

Gets an item from the cache, returning null if expired.