:)
Perhaps I could have used Exceptions but well at least I use a Constant
file.... a little better!
The more I think about the better it seems to get.... damn I have some
code rewriting to do...
Thanks Bill.
Bill Siggelkow <[EMAIL PROTECTED]>
Sent by: news <[EMAIL PROTECTED]>
07/07/2004 04:10 PM
Please respond to "Struts Users Mailing List"
To: [EMAIL PROTECTED]
cc:
Subject: Re: [OT] Session facade
Classification:
Glenn, I was with you until the part about the "return code" ... I think
it would be better to translate the DAOException to some
BusinessServiceException or something similar instead of a "return code".
Generally, I try and avoid the "method returns a -1 to indicate that the
operation failed" kind of thing -- it is so 'C' like :)
[EMAIL PROTECTED] wrote:
> my 2 cents...
>
> I am using the Facade in my current project.
>
> Firstly, just in case that EJBs will be introduced in subsequent phases.
>
> Secondly, the DAO throws exceptions of DAOException & a FatalException.
> Say that a Stored Procedure returns an application error (invalid
> parameter in a SP); this is treated as a DAOException.
> Say that the DB is not there this is treated as a FatalException.
>
> The Facade catches and interprets the DAOException with a Return Code.
> Say that the DB is used to authenticate a User Id and Password.
> The Facade is where the DAOException to translated into a simple Return
> Code that the Action will check for.
>
> This a way the Action classes are nice a clean!
> - Glenn
>
>
>
>
>
> "Ricardo Cortes" <[EMAIL PROTECTED]>
> 07/07/2004 03:28 PM
> Please respond to "Struts Users Mailing List"
>
>
>
>
>
> To: "Struts Users Mailing List" <[EMAIL PROTECTED]>
> cc:
>
> Subject: RE: Session facade
> Classification:
>
>
> I would assert you don't need the Session Facade as one of the
advantages
> of the Session Facade is it's ability to abstract the low level
operations
> of the Session EJBs from upper layers of your architecture. You could
> probably have your actions talking to a Business Delegate layer or your
> DAO layer directly. Of course, this is just one viewpoint.
>
> -----Original Message-----
> From: Zhang, Larry (L.) [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, July 07, 2004 2:59 PM
> To: Struts Users Mailing List
> Subject: Session facade
>
>
>
> It seems session facade design pattern is becoming ubiquitous. My
> question is that
> if we are not going to use EJB(but we do have DAO-data access object),
> does it still make sense to use session facade?
>
> Thanks.
>
>
>
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