freemarker.cache: public class: SoftCacheStorage

freemarker.cache
public class: SoftCacheStorage [javadoc | source]

java.lang.Object
   freemarker.cache.SoftCacheStorage

All Implemented Interfaces:
ConcurrentCacheStorage

Soft cache storage is a cache storage that uses SoftReference objects to hold the objects it was passed, therefore allows the garbage collector to purge the cache when it determines that it wants to free up memory. This class is thread-safe to the extent that its underlying map is. The default implementation uses a concurrent map on Java 5 and above, so it is thread-safe in that case.

author: Attila - Szegedi

version: $ - Id: SoftCacheStorage.java,v 1.4 2003/09/22 20:47:03 ddekany Exp $

Constructor:
public SoftCacheStorage() { this(ConcurrentMapFactory.createMap()); }
public SoftCacheStorage(Map backingMap) { map = backingMap; this.concurrent = ConcurrentMapFactory.isConcurrent(map); }

Constructor:

 public SoftCacheStorage() {
    
        this(ConcurrentMapFactory.createMap());
}

 public SoftCacheStorage(Map backingMap) {
        map = backingMap;
        this.concurrent = ConcurrentMapFactory.isConcurrent(map);
}

Method from freemarker.cache.SoftCacheStorage Summary:
clear, get, isConcurrent, put, remove

Methods from java.lang.Object:
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from freemarker.cache.SoftCacheStorage Detail:
public void clear() { map.clear(); processQueue(); }
public Object get(Object key) { processQueue(); Reference ref = (Reference)map.get(key); return ref == null ? null : ref.get(); }
public boolean isConcurrent() { return concurrent; }
public void put(Object key, Object value) { processQueue(); map.put(key, new SoftValueReference(key, value, queue)); }
public void remove(Object key) { processQueue(); map.remove(key); }