----------------------------------------------------------- New Message on cochindotnet
----------------------------------------------------------- From: Z?�n Message 6 in Discussion In particular scenario .. The DAL itself may be shadowed by a facade layer... this is cause sometimes the datasource may not be just one database.. or cluster... it might not even be a database at all... Think of a scenario where you do not have all the data in your application but have to depend on 3rd party for say social security number etc or credit card details.. here you facade can determine where to fetch the data from ..may be a web service or a database or a remotly hosted object. etc The Biz layer is fully abstracted and only know that it is getting the data somehow ... this level of abstraction is one good feature with using n-layered or n-tier architechture.. if you are really interested in such stuff .. http://www.martinfowler.com/ieeeSoftware/dataAccessRoutines.pdf this basically says about how object can be modeled for dataaccess... i'll put in more links if you want.. ----------------------------------------------------------- To stop getting this e-mail, or change how often it arrives, go to your E-mail Settings. http://groups.msn.com/cochindotnet/_emailsettings.msnw Need help? If you've forgotten your password, please go to Passport Member Services. http://groups.msn.com/_passportredir.msnw?ppmprop=help For other questions or feedback, go to our Contact Us page. http://groups.msn.com/contact If you do not want to receive future e-mail from this MSN group, or if you received this message by mistake, please click the "Remove" link below. On the pre-addressed e-mail message that opens, simply click "Send". Your e-mail address will be deleted from this group's mailing list. mailto:[EMAIL PROTECTED]
