64. What is Action Class

  • The Action is part of the controller. The purpose of Action Class is to translate the HttpServletRequest to the business logic.
  • To use the Action, we need to  Subclass and overwrite the execute()  method.
  • The ActionServlet (commad) passes the parameterized class to Action Form using the execute() method.
  • There should be no database interactions in the action.
  • The action should receive the request, call business objects (which then handle database, or interface with J2EE, etc) and then determine where to go next.
  • Even better, the business objects could be handed to the action at runtime (IoC style) thus removing any dependencies on the model.  
  • The return type of the execute method is ActionForward which is used by the Struts
  • Framework to forward the request to the file as per the value of the returned ActionForward object.
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One Response

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