er.extensions.foundation
Class ERXLazyValue.CacheKeyInvalidator

java.lang.Object
  er.extensions.foundation.ERXLazyValue.CacheKeyInvalidator

All Implemented Interfaces:

ERXLazyValue.Invalidator

Direct Known Subclasses:

ERXLazyValue.MutableCacheKeyInvalidator

Enclosing class:

ERXLazyValue<T>

public abstract static class ERXLazyValue.CacheKeyInvalidator
extends Object
implements ERXLazyValue.Invalidator

The base class for any invalidator that is triggered by the change in a cache key.

Author:

mschrag

Constructor Summary

ERXLazyValue.CacheKeyInvalidator()

Method Summary

protected abstract Object	cacheKey() Returns the current value of the cache key.
void	fetchedValue(Object value) Called when the lazy value is refetched from the source.
boolean	shouldInvalidate() Returns whether or not the lazy value should invalidate its cache.

Methods inherited from class java.lang.Object

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

Constructor Detail

ERXLazyValue.CacheKeyInvalidator

public ERXLazyValue.CacheKeyInvalidator()

Method Detail

fetchedValue

public void fetchedValue(Object value)

Description copied from interface: ERXLazyValue.Invalidator

Called when the lazy value is refetched from the source.

Specified by:

fetchedValue in interface ERXLazyValue.Invalidator

Parameters:

value - the new value

cacheKey

protected abstract Object cacheKey()

Returns the current value of the cache key.

Returns:

the current value of the cache key

shouldInvalidate

public boolean shouldInvalidate()

Description copied from interface: ERXLazyValue.Invalidator

Returns whether or not the lazy value should invalidate its cache.

Specified by:

shouldInvalidate in interface ERXLazyValue.Invalidator

Returns:

whether or not the lazy value should invalidate its cache