[Opensource] prePerform(), postPerform() Template Methods

[larry hamel]

any more feedback on this?  Mike thought it already existed in struts actions, but I can't find such a feature that is accessible to a controller.

larry

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I perceive a need for a Template Method pattern to enable pre- and postprocessing on the main controller path, 
        nextState.perform(stateForm, myRequest, myResponse);

(Line 1310 in Controller.Java)

For example, common code dealing with a header and footer could be put there.

Since a controller is just an arbitrary collection of states (less arbitrary if you use flow control), it seems OK that all states within a controller would share the same pre- and postprocessing.

Specifically, consider the following to replace line 1310:

        prePerform(nextState, myRequest, myResponse);
        nextState.perform(stateForm, myRequest, myResponse);
        postPerform(nextState, myRequest, myResponse);

Where the implementation is just a no-op in the superclass.

   void prePerform(nextState, ControllerRequest request, ControllerResponse response) throws ControllerException {}

What you think?

larry