Using the from-action Element

• Suppose two actions return the same string but you want them to navigate to different pages. Example:
  • quiz.answerAction returns "again", wants to go to again.jsp
  • quiz.startOverAction returns "again", wants to go to index.jsp

• Use the from-action element to distinguish:

       <navigation-case>
         <from-action>#{quiz.answerAction}</from-action>
         <from-outcome>again</from-outcome>
         <to-view-id>/again.jsp</to-view-id>
       </navigation-case>
       <navigation-case>
         <from-action>#{quiz.startOverAction}</from-action>
         <from-outcome>again</from-outcome>
         <to-view-id>/index.jsp</to-view-id>
       </navigation-case>

• If you stay away from from-action elements and wildcards, you need not know details of navigation algorithm (p. 87)