org.cdlib.xtf.cache
Class CacheDependency

Object
  Dependency
      CacheDependency

public class CacheDependency
extends Dependency

CacheDependency represents a dependency on an entry of the same or another cache. If the cache entry changes, disappears, or its dependencies become stale, then this dependency also becomes stale.

Field Summary

Cache	cache The cache we're depending on
Object	key The key within that cache we're depending on
long	lastSet The set time of the cache entry when this dependency was created.

Constructor Summary

CacheDependency(Cache cache, Object key)
Constructor.

Method Summary

boolean

validate() Checks if the dependency is still valid.

Methods inherited from class Object

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

Field Detail

cache

public Cache cache

The cache we're depending on

key

public Object key

The key within that cache we're depending on

lastSet

public long lastSet

The set time of the cache entry when this dependency was created.

Constructor Detail

CacheDependency

public CacheDependency(Cache cache,
                       Object key)

Constructor.

Parameters:

cache - The cache containing the entry to depend on

key - Key value to depend on within that cache.

Method Detail

validate

public boolean validate()

Checks if the dependency is still valid. If the cache entry has changed, disappeared, or has invalid dependencies, then this dependency is stale.

Specified by:

validate in class Dependency

Returns:

true iff the dependency is still fresh.