Re: implementing a Tapestry IoC annotation to cache method results

[Lance Java]

The "watch" parameter will reset the cache if another property changes.
Consider a loop:

<t:loop source="items" value="item">
   <if:test=&quot;transformedItem.valid&quot;>
      ${transformedItem.someProperty}
   </t:if>
</t:loop>

public class MyPage
   @Property
   private Item item;

   public List<Item> getItems() { ... }

   @Cached(watch="item")
   public TransformedItem getTransformedItem() {
      return doSomeTransformation(item);
   }
}

In this example, "transformedItem" can be cached until "item" changes.



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