org.nees.util.cache
Class CachingStrategy

java.lang.Object
  org.nees.util.cache.CachingStrategy

Direct Known Subclasses:

ObjectCountingCachingStrategy, SimpleCachingStrategy

public abstract class CachingStrategy

extends java.lang.Object

CachingStrategies negotiate access to an expensive underlying resource through a single accessor method, get(). The strategy can fetch objects from an underlying resource which implements the Cacheable interface, and can also manage a Cache of objects so as to reduce usage of the underlying resource.

See Also:

Cacheable, Cache

Constructor Summary

CachingStrategy()

CachingStrategy(Cache cache, Cacheable cacheable)

Method Summary

abstract java.lang.Object	get(java.lang.Object key) Get an object by key.
Cache	getCache()
Cacheable	getCacheable()
void	setCache(Cache c)
void	setCacheable(Cacheable c)

Methods inherited from class java.lang.Object

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

Constructor Detail

CachingStrategy

public CachingStrategy(Cache cache,
                       Cacheable cacheable)

Parameters:

cache - the cache

cacheable - the cacheable resources

CachingStrategy

public CachingStrategy()

Method Detail

setCacheable

public void setCacheable(Cacheable c)

getCacheable

public Cacheable getCacheable()

setCache

public void setCache(Cache c)

getCache

public Cache getCache()

get

public abstract java.lang.Object get(java.lang.Object key)
                              throws java.lang.Exception

Get an object by key. Override this to provide specific caching behavior.

Parameters:

key - the key

Returns:

the associated object

Throws:

java.lang.Exception