[Struts Wiki] Update of "ShaleCoreLibrary" by WendySmoak

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The following page has been changed by WendySmoak:
http://wiki.apache.org/struts/ShaleCoreLibrary

The comment on the change is:
Record another one of Craig's answers. :)

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+ = Shale Core Library =
+ 
- == Shale Core Library JSF Components and Tags ==
+ == JSF Components and Tags ==
  
   * [http://struts.apache.org/struts-shale/shale-core/tagreference-taglib.html Tag Reference]
  
@@ -14, +16 @@

    </h:form>
  }}}
  
+ == View Controller ==
+ 
+ === When to use init(), preprocess() and prerender() ===
+ 
+   In [http://www.nabble.com/Re%3A-Shale-AbstractViewController-for-Dummies-p4073019.html this thread], Craig suggests asking yourself the following questions:
+    1. Do I need the results of this computation in order to process a form submit? 
+    1. Do I need the results of this computation in order to render the page?
+   
+   Then, based on your answers, 
+    * Use init() for ''(1) and (2)''
+    * Use preprocess() for ''(1) only''
+    * Use prerender() for ''(2) only''
+ 

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