Comments on: Building a multilayer XPage Architecture

By: Mario Gutsche

Mario Gutsche — Mon, 11 Apr 2011 18:18:17 +0000

Hi Dan,

i can’t share the Project because I’m not working anymore for my former employer. If you use DTOs or your business models directly, depends on the project and your design decision. Just do a search, there has been written enough about DTOs in the Java environment.

best regards
Mario *doing pure j2ee development from now on*

By: DAN

DAN — Thu, 07 Apr 2011 20:29:06 +0000

Hi Mario, It would be great if you could share the entire project that you have. I wanted to know what dto-es are and how you are using them in conjunction with the DAO?

By: Mario

Mario — Fri, 21 Jan 2011 22:03:05 +0000

Hi Nick,

the Data Access Layer has several Advantages:
If you change the Datasource from Notes to SQL/… you have a central place to do so, you don’t have to overwrite existing code – you create additional classes, but must importantly: you don’t have to change you logic code (model layer), so you can’t break the application.
Another point are design principles, please google for “Single Responsibility Principle”. There is no reason, for your employee/… bean to know, how to save/search himself in the database. Thats the responsibility of the data access layer.

By: nick

nick — Fri, 21 Jan 2011 13:12:23 +0000

Mario,

I am using JSF managed beans for my current project. This was a great little presentation, it clarified to me that I am missing 1 layer (the Data access Layer, I’m going straight from Model to Data), at this stage in project, I can correct my mistake. Thanks!

By: Mario

Mario — Wed, 05 Jan 2011 19:49:52 +0000

@Niklas: The Openntf project: http://www.openntf.org/internal/home.nsf/project.xsp?action=openDocument&name=XPage%20multi-layer%20architecture%20demo

By: Mario

Mario — Thu, 09 Dec 2010 23:30:29 +0000

@Ferry: Thanks for the information, i changed the file, it should work now.

@Niklas: I will do so if i find some time, maybe next week

By: Ferry Kranenburg

Ferry Kranenburg — Thu, 09 Dec 2010 13:00:24 +0000

The Demo NSF has local encryption enabled. Could you remove it?

By: Niklas Heidloff

Niklas Heidloff — Thu, 09 Dec 2010 07:59:53 +0000

Mario, very nice. I like esp. the usage of Collections as data source.

Would be great if you could contribute this sample to OpenNTF.

By: ChrisC

ChrisC — Thu, 09 Dec 2010 07:39:14 +0000

Mario,

Thanks an excellent articile. Been moving towards this model for xPages – this helps with better organising things.

Keep up the great work!!!