business delegate vs interface
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Posted By:   Raphael_B
Posted On:   Wednesday, December 22, 2004 11:58 PM

I'm writing a struts application. I used to program to interfaces from Action classes directly like shown below. What is the advantage of using a business delegate pattern vs programming directly to the interface? I understand that if I change LoginService implementations, I would need to change the line of code below in my Action class. However, if this code is moved to a BD class, it would still need to be changed in the BD. So what are the advantages?

ILoginService loginService = DBLoginService.getLoginService();

Re: business delegate vs interface

Posted By:   sathish_natarajan  
Posted On:   Tuesday, March 15, 2005 03:47 AM

Business deligate seperates the model and view layers .
It exactly lies between web-tier and model layer

Re: business delegate vs interface

Posted By:   Anonymous  
Posted On:   Monday, December 27, 2004 02:48 PM

There is a very good description at http://java.sun.com/blueprints/corej2eepatterns/Patterns/BusinessDelegate.html
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