1 Reply Latest reply on Jul 17, 2009 3:41 AM by Luis Lanzafame

    Use Case Exceptions handling

    Maximiliano Carrizo Newbie

      I think it would be interesting a new exceptions handling method: use case exceptions handling.


      Imagine this scenario: I've got a use case object that throws a Runtime exception when it fails:



          public void createNewAccount() {
              if(useIsVerySilly()) {
                   throw new UserIsVerySillyException();
              }
          }
      



      And UserIsVerySillyException:


      public class UserIsVerySillyException extends RuntimeException {
      
      }
      



      I don't want pages.xml traps this exception. I want current page .pages.xml navigation files capture it, to show a beautiful bundled message on it.


      myusecasepage.page.xml should be:


           <exception class="org.test.UserIsVerySillyException">
                <redirect view-id="#{facesContext.externalContext.requestServletPath}">
                     <message>#{messages['user_very_silly']}</message>
                </redirect>
           </exception>
      
      



      So, basically, to trap exceptions in the same page they are generated.