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--- caching:ex3 [2007/02/26 18:37] – created bdefrain
+++ caching:ex3 [2008/10/07 14:09] – bdefrain
@@ Line 3: / Line 3: @@
 **Task:** Pass ''tests.Invalidation1''.
-While caching in this way does save computation, it will lead to incorrect bounding boxes if a ''Group'' is ever moved. Write another aspect that invalidates (i.e. clears) the cache whenever the ''move()'' method of ''Group'' is called.
+While caching in this way does save computation, it will lead to incorrect bounding boxes if a ''Group'' is ever moved. Write another **separate** aspect that invalidates (i.e. clears) the cache whenever the ''move()'' method of ''Group'' is called.
 <note tip>
-Employ an additional ''before'' advice.
+Employ an additional ''before'' advice. The original aspect that manages the cached data should provide functionality to clear the cache.
+To reach the aspect instance, you might need to use the ''aspectOf'' method.
 </note>
@@ Line 13: / Line 15: @@
 ----
-Remove the invalidation aspect from the build path and continue with [[caching:ex3|Exercise 3]].
+Remove the invalidation aspect from the build path and continue with [[caching:ex4|Exercise 4]].