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From Igor Shabalov <igor.shaba...@exadel.com>
Subject Re: Right way to extends Action
Date Tue, 01 Apr 2003 01:16:48 GMT

	In general I like an idea to assembly application from set of pre-defined 
actions with parameters. It is about reuse of actual action 
“implementations” within application.
	Best,
	Igor.


On Mon, 31 Mar 2003 17:07:09 -0800, Van Riper, Mike 
<mvanriper@verisign.com> wrote:

>> -----Original Message-----
>> From: Xavier Saint-Denis [mailto:stdenis2@free.fr]
>> Sent: Monday, March 31, 2003 4:21 AM
>> To: Struts Users Mailing List
>> Subject: Re: Right way to extends Action
>>
>>
>> Hi,
>> In our application we use a similar concept :
>>
>> - we have a class like this :
>> public abstract class BaseAction extends Action
>
> What about DispatchAction and LookupDispatchAction? Anyone have a good
> solution for reuse of common action logic across these multiple action 
> base
> classes provided by Struts?
>
>>
>> In this class :
>>
>> - we added some usefull field like a logger an a pointer to a singleton 
>> that
>> retains application's data
>> protected Log log = LogFactory.getLog(this.getClass());
>> protected static final Infos infos = Infos.getInstance();
>>
>> - We change the modifier of the execute Method so as to be sure nobody 
>> use
>> it directly:
>> public final ActionForward execute(ActionMapping _mapping, ActionForm
>> _form, HttpServletRequest _req, HttpServletResponse _res) throws 
>> Exception {
>>
>> - In this method we check the user session and log in information
>> - At the end of this method we call
>> return executeAction(_mapping, _form, _req, _res);
>>
>> - This method "executeAction" is defined as this :
>> public abstract ActionForward executeAction(ActionMapping _mapping,
>> ActionForm _form, HttpServletRequest _req, HttpServletResponse _res) 
>> throws
>> Exception;
>>
>> - So when we create a new action, we extend BaseAction and implement the
>> abstract method executeAction
>> This way, we have automatic user login check, and a logger at 
>> disposition.
>>
>> regards,
>>
>> Xavier
>>
>> ----- Original Message -----
>> From: "niksa_os" <niksa_os@hotmail.com>
>> To: "Struts Users Mailing List" <struts-user@jakarta.apache.org>
>> Sent: Monday, March 31, 2003 1:45 PM
>> Subject: Right way to extends Action
>>
>>
>> I want all my Actions to extend BaseAction.
>>
>> In BaseAction I want to check user session and to put some data in it, 
>> if
>> that data doesn't exist.
>>
>> Is it good way:
>>
>> public class SomeAction extends BaseAction {
>> public ActionForward execute( ActionMapping mapping,
>> ActionForm form,
>> HttpServletRequest request,
>> HttpServletResponse response ) {
>> super.execute( mapping,form, request, response);
>> OK, proceed ...........
>>
>>
>> public class BaseAction extends BaseAction {
>> public ActionForward execute( ActionMapping mapping,
>> ActionForm form,
>> HttpServletRequest request,
>> HttpServletResponse response ) {
>> if (userSession is wrong) {
>> -try   -- put data in session
>> -catch -- return mapping.findForward("wrongSession");}
>> else return null;  //everything is OK
>>
>> What you think about this way and is there better way to extend Action?
>>
>> Thanks.
>>
>>
>>
>
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>



-- 
Igor Shabalov
Director of Engineering
Exadel Inc.
http://www.exadel.com

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