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--- caching:ex3 [2008/10/07 14:09]
bdefrain
+++ caching:ex3 [2021/02/05 13:51]
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-====== Caching: Invalidate (part I) ======
-**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 **separate** aspect that invalidates (i.e. clears) the cache whenever the ''move()'' method of ''Group'' is called.
-<note tip>
-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>
-A correct implementation will pass the tests of suite ''tests.Invalidation1''.
-----
-Remove the invalidation aspect from the build path and continue with [[caching:ex4|Exercise 4]].

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