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domaindrivendesign · Domain-Driven Design

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Messages 7370 - 7399 of 23085   Oldest  |  < Older  |  Newer >  |  Newest
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7370 bhatiana Offline Send Email May 1, 2008
5:37 pm
I am implementing an application using DDD principles. I am using Hibernate for persistence. I would like to keep the domain model independent of my...
7371 Casey Charlton
caseycharlton69 Offline Send Email
May 1, 2008
5:37 pm
Could you not just give the UI coders byte level access to the database server disk filing system? That might give them more flexibility ... ... Could you not...
7372 Richard Wallace
rwallace1979 Offline Send Email
May 1, 2008
7:56 pm
I agree with you. Most of what you've said reflects my thoughts the past few days too. I think the critical thing to get across to the domain experts is if...
7373 Monico A. Moreno
monico1028 Offline Send Email
May 1, 2008
8:45 pm
What are some real companies or case studies that use DDD? Anyone know? I would love to see a list of or read about successful utilizations of DDD to any...
7374 Eric Evans
ericevans0 Offline Send Email
May 1, 2008
8:51 pm
Those scenarios are important. They anchor everyone, and we need that anchor when working on abstract models, or we'll just float off into ... The difference...
7375 Hendry Luk
hendrypa Offline Send Email
May 1, 2008
11:49 pm
I'm quite new to DDD myself, but in my perspective, I think I would use observer pattern for this scenario. Write a TargetPriceNotifier, and let each Security...
7376 hendrypa Offline Send Email May 2, 2008
2:16 am
Scott, your post PERFECTLY represents everything I feel all this time. In every projects I have worked on, unfortunately no one put enough appreciation to...
7377 Greg Young
gumboismadeo... Offline Send Email
May 2, 2008
2:21 am
This sounds like a very dysfunctional organization ... I would doubt that they would ever get themselves out of such a state no matter what you do unless they...
7378 Tomas Karlsson
marcellus874 Offline Send Email
May 2, 2008
9:31 am
Interesting to blame me for going into Feature Driven Development ;-) I am involved in the start of a new project where DDD should be combinded with Scrum - or...
7379 Udi Dahan
udidahan7 Offline Send Email
May 2, 2008
12:13 pm
I think that the problem you’re having with your securities example is that you’re trying to force-fit historical analysis into a Domain Model – no, DDD ...
7380 Tomas Karlsson
marcellus874 Offline Send Email
May 2, 2008
1:31 pm
I want to check at 'save'. This means the object can be in an inconsistent state while the user is working, but the user cannot save if business rules are...
7381 Johan Stuyts
objectthinker Offline Send Email
May 2, 2008
1:46 pm
... Don't make 'closed' a checkbox on the form. Instead provide buttons for closing: - save: stores changes - save & close: stores changes and then closes -...
7382 Tomas Karlsson
marcellus874 Offline Send Email
May 2, 2008
1:54 pm
You are right! I am looking for a very tight connection between the UI and the Domain objects. But to me that is the idea with the RAD tools. Of course, you...
7383 bhatiana Offline Send Email May 2, 2008
2:03 pm
Hi Udi, thanks for your response. I may have not explained the example well. The external algorithm is not doing any history analysis on TargetPrice. It is...
7384 bhatiana Offline Send Email May 2, 2008
2:16 pm
Yes, that's exactly what I was trying to get at: is it a good practice to allow entities to access DAO interfaces? (I understand the part about dependency...
7385 Niclas Nilsson
nicware42 Offline Send Email
May 2, 2008
2:25 pm
... I would like to give a warm recommendation to try BDD-style scenarios when you do this. Given <context> When <something happens> Then <expected outcome> Im...
7386 Niclas Nilsson
nicware42 Offline Send Email
May 2, 2008
2:40 pm
... Basically, it because it's not something that is special to just a product. It's a cross-cutting concern. Anytime you see something that appears in many...
7387 Niclas Nilsson
nicware42 Offline Send Email
May 2, 2008
3:03 pm
Hi Mel, When building systems like these (heavily event-driven), I always view the events as core part of the domain. I don't view it as a cross- cutting...
7388 Richard Wallace
rwallace1979 Offline Send Email
May 2, 2008
3:30 pm
Hello, I'm trying to model a fairly simple situation where I've got an Item that can be categorized in a number of ways, one being Style. More specifically,...
7389 Greg Young
gumboismadeo... Offline Send Email
May 2, 2008
4:12 pm
Why not put the events into a pipeline? pipelines are great because you can add a filter which would handle a cross cutting concern such as this. Cheers, Greg ...
7390 John Roth
jhrothjr Offline Send Email
May 2, 2008
4:37 pm
I'm not quite sure what you're getting at, since some of the terminology seems a bit strange. However, here's what's recommended in a fairly large number of...
7391 Udi Dahan
udidahan7 Offline Send Email
May 3, 2008
9:01 am
Ø When I started out with DDD, my thought was to keep persistence concerns completely out of the domain model. Good. Ø However, in practice, it seems...
7392 Tomas Karlsson
marcellus874 Offline Send Email
May 3, 2008
9:10 am
Many thanks for inspiration! So the conclusion seems to be that we still have to think when we build the user interfaces! Some parts of the domain object are...
7393 Tomas Karlsson
marcellus874 Offline Send Email
May 3, 2008
9:31 am
Can I reuse the statement "We are looking for a model that..."? This is the one-liner we are looking for in this discussion! The customer should provide the...
7394 Johan Stuyts
objectthinker Offline Send Email
May 3, 2008
11:46 am
... You're welcome. ... For the most flexibility I see every operation in the same way: - start a transaction - query the database to get the object to work...
7395 Greg Young
gumboismadeo... Offline Send Email
May 3, 2008
7:29 pm
I think you are missing the *why* from your stories Niclas which is generally a key point in BDD.. I as a user I want to enter customers to the system so that...
7396 Niclas Nilsson
nicware42 Offline Send Email
May 3, 2008
11:03 pm
No, I've been doing enough BDD (including co-presenting it with Dan at JAOO a couple of years ago) to not miss it, but I deliberately left them out in this...
7397 Greg Young
gumboismadeo... Offline Send Email
May 3, 2008
11:14 pm
Sorry I wasn't saying that you don't know BDD (reading back, I may have come across that way); I included the link for others to have more information. My...
7398 Naresh Bhatia
bhatiana Offline Send Email
May 3, 2008
11:42 pm
Thanks John. The terminology is certainly confusing. This is my understanding based on Eric and Fowler's work: Eric defines layering as follows (page 68 of...
7399 Naresh Bhatia
bhatiana Offline Send Email
May 3, 2008
11:43 pm
Udi, thanks for being persistent about keeping persistence out of the domain model :-). It feels more natural to me anyway. Your post triggered a lot of...
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