Comments on: DDD: Bounded Contexts

By: Getting a better view from the roof of the Bus | YOOT

Getting a better view from the roof of the Bus | YOOT — Thu, 05 Nov 2009 22:46:41 +0000

[...] to achieve its main goals. Another possibility can also be to model your Services around Bounded Contexts that you would have previously identified, if you are a DDD practitioner. I'm still not yet [...]

By: Learning through teaching at Mark Needham

Learning through teaching at Mark Needham — Mon, 20 Apr 2009 21:40:07 +0000

[...] on what you write means that it can become a two way conversation. There have certainly been a couple of occasions when people with more knowledge of a topic than me have pointed out where my [...]

By: DDD: Recognising relationships between bounded contexts at Mark Needham

DDD: Recognising relationships between bounded contexts at Mark Needham — Mon, 30 Mar 2009 12:54:31 +0000

[...] There are various patterns used to describe the relationships between different bounded contexts: [...]

By: Casey

Casey — Tue, 10 Mar 2009 13:33:26 +0000

I think Philip is right – the concept of layers exists in the DDD book (not to hand so don't have a reference) … and the persistence layer is just that.

That said, I would say the UI could well be considered a separate BC – one of the aspects of a BC is that it contains all it's own code, data and logic – in total isolation, both logically and physically, from other BCs

By that definition, a UI application is a prime candidate for being called a BC … and I have always tended to. Also b that definition the ORM/DB/Peristence stuff is not a BC, as it is in the same codebase as the BC it belongs to – and there will almost certainly be a complete implementation of the persistence mechanism for each BC.

Hope that makes sense …

(oh and btw I think Udi Dahan and possibly Greg Young disagree with me calling a UI a BC)

By: Mark Needham

Mark Needham — Mon, 09 Mar 2009 07:55:41 +0000

Would that also mean that the UI example wouldn't work either as I would have thought the UI is a different layer to the domain?

Maybe I've used the wrong terminology but it seems as if the concept behind it is quite similar.

By: Phillip Calçado

Phillip Calçado — Mon, 09 Mar 2009 01:51:08 +0000

I'm not sure I got your database example. There is, for sure, some anti-corruption mechanism, usually designed as Data Mappers and other POEAA patterns, but this wouldn't be a different Bounded Context, those are just -guess what?- Layers. Bounded Contexts are "vertical" divisions, Layers are "horizontal". Or maybe I didn't understand your post at all.

By: DotNetShoutout

DotNetShoutout — Sun, 08 Mar 2009 21:43:53 +0000

DDD: Bounded Contexts – Mark Needham…

Thank you for submitting this cool story – Trackback from DotNetShoutout…

By: Arjan`s World » LINKBLOG for March 8, 2009

Arjan`s World » LINKBLOG for March 8, 2009 — Sun, 08 Mar 2009 18:33:30 +0000

[...] DDD: Bounded Contexts -Mark Needham [...]