com.caucho.util
Class TimedCache
java.lang.Object
|
+--com.caucho.util.LruCache
|
+--com.caucho.util.TimedCache
- public class TimedCache
- extends LruCache
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 |
TimedCache(int capacity,
long expireInterval)
Creates a new timed LRU cache. |
Method Summary |
java.lang.Object |
get(java.lang.Object key)
Gets an item from the cache, returning null if expired. |
java.lang.Object |
put(java.lang.Object key,
java.lang.Object 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 |
TimedCache
public TimedCache(int capacity,
long expireInterval)
- Creates a new timed LRU cache.
- Parameters:
capacity
- the maximum size of the LRU cacheexpireInterval
- the time an entry remains valid
put
public java.lang.Object put(java.lang.Object key,
java.lang.Object value)
- Put a new item in the cache.
- Overrides:
put
in class LruCache
- Following copied from class:
com.caucho.util.LruCache
- Parameters:
key
- key to store datavalue
- value to be stored- Returns:
- old value stored under the key
get
public java.lang.Object get(java.lang.Object key)
- Gets an item from the cache, returning null if expired.
- Overrides:
get
in class LruCache
- Following copied from class:
com.caucho.util.LruCache
- Parameters:
key
- key to lookup the item- Returns:
- the matching object in the cache