1
vote
1answer
78 views

“Cross-cutting” domain in DDD

I've recently started studying Domain Driven Design and so far it looks like it will help tremendously with my team's current project. I'm running into a bit of a problem though actually determining ...
0
votes
1answer
140 views

Technical example of modeling a domain with OOD?

Considering favoring composition over inheritance and looking at various design patterns there are multiple approaches to modeling a domain. Say you have some Entities which are very similar in some ...
0
votes
0answers
25 views

Domain security involving domain logic

Together with my application's domain logic I am trying to outline the security model. I am stuck with a requirement that prevents me from considering security just a cross-cutting concern over my ...
1
vote
1answer
69 views

Cascading deletes from an aggregate root through out the entire aggregate doesn't make sense

Based on the same example for this question. Within the Pro ASP.Net MVC 4 by Adam Freeman, there is a discussion on aggregates and aggregate roots with a simple auction system. There are members who ...
1
vote
1answer
153 views

DDD - Business rule that depends on a service

I got confused about if a domain is required to access an external service in some state of it's life cycle. The business rule is this : If an Employee is accepting a JobSeeker's JobApplication, ...
2
votes
2answers
113 views

Rich domain model and container services

I have a long experience in programming Java EE projects, but as I noticed most of the job I have done was with Transaction Script (anti)pattern. So I want to learn using a rich domain model, but ...
1
vote
2answers
174 views

ID properties on Domain objects in DDD

In my domain I have an Account object. e.g. class Account { public string Number; public string SortCode; } Within the context of DDD, should this account object have an ID property? The ...
0
votes
2answers
243 views

How do I make a domain model that doesn't violate OOP?

My game reads a number of JSON files, deserializes them, and hands the resulting objects off to the classes that need them. These deserialized objects, which can be thought of as the domain model, are ...
2
votes
1answer
362 views

DDD: Domain Model Factory Design

I am trying to understand how and where to implement domain model factories. I have included my Company aggregate as a demo of how I have done it. I have included my design decisions at the end - I ...
0
votes
0answers
72 views

Model Driven Design with Bean Validation

If I have a rich domain library that gets included into a Java web application, but I want to achieve a level of dependency isolation with that domain library such that it is possible to build and ...
0
votes
2answers
111 views

How does one design his various architecture/business models?

I'm currently learning about various application design approaches and there's one thing I can't really get my head around. Let's say I have a physical device in my network, an IP surveillance ...
16
votes
6answers
1k views

Do RESTful APIs tend to encourage anemic domain models?

I'm working on a project in which we are trying to apply both domain-driven design and REST to a service-oriented architecture. We aren't worrying about 100% REST compliance; it would probably be ...
2
votes
2answers
139 views

Choosing an ubiquitous language across different bounded contexts

If my domain has several Bounded Contexts, but only ONE team will work on all contexts, should I develop an Ubiquitous language for each context? or should I have only one and force to into all ...
0
votes
1answer
127 views

Why aren't Entities allowed to reference other entities inside an aggregate except the root?

I have read in several places this following rule concerning Aggregates: Entities in one aggregate can hold references to any other Aggregate Root, but never to an Entity or Value Object inside ...
0
votes
1answer
105 views

Aggregate Boundary repository/service design

I am trying to apply DDD to the design of a Release Management system. Domain Entities Project: The project/product/system. ProjectEnvironment: The environments (Test, Staging, Prod) that exist ...
3
votes
3answers
191 views

Ensuring transactional consistency with DDD

I am starting out with DDD and understand that aggregate roots are used to ensure transnational consistency. We should not modify multiple aggregates in one application service. I would like to know ...
0
votes
1answer
607 views

How do you formulate the Domain Model in Domain Driven Design properly (Bounded Contexts, Domains)?

Say you have a few applications which deal with a few different Core Domains. The examples are made up and it's hard to put a real example with meaningful data together (concisely). In Domain Driven ...
4
votes
3answers
293 views

Architecting multi-model multi-DB ASP.NET MVC solution

I have an ASP.NET MVC 4 solution that I'm putting together, leveraging IoC and the repository pattern using Entity Framework 5. I have a new requirement to be able to pull data from a second database ...
0
votes
3answers
692 views

Auto - incremental ID in Domain Object

I read a lot about auto-incremental id (guid, interlocked.increment, ObjectIdGenerator...) but don't find nothing for my situation. In my domain model user ask to have an automatic progressive ...
2
votes
2answers
342 views

NHibernate and complex domain model against a legacy database

I'm trying to refactor (actually, rewrite) an application which currently uses only stored procedures to access the database (hundreds of SPs). My goal is to use Nhibernate and follow a good design as ...
2
votes
1answer
351 views

How far to go with Domain Driven Design?

I've read a little about domain driven design and the usage of a rich domain model, as described by Martin Fowler, and I've decided to put it in practice in a personal project, instead of using ...
3
votes
2answers
284 views

Single Responsibility principle VS KISS principle

Let's assume the modeling of User model in a context of a social network. User concept is composed of two notions: Authentication elements like userName/Password/Email etc... Extra data information ...
1
vote
1answer
328 views

DDD Model Design and Repository Persistence Performance Considerations

So I have been reading about DDD for some time and trying to figure out the best approach on several issues. I tend to agree that I should design my model in a persistent agnostic manner. And that ...
3
votes
2answers
466 views

Can the following Domain Entity contain logic for creating/deleting other entities?

a) As far as I understand it, in most cases Domain Model DM doesn't contain code for creating/deleting domain entities, but instead it is the job of layers ( ie service layer or UI layer ) on top of ...
5
votes
6answers
493 views

Should a domain expert make class diagrams?

The domain expert in our team uses UML class diagrams to model the domain model. As a result, the class diagrams are more of technical models rather than domain models (it serves of some sort of ...
3
votes
2answers
74 views

Resources on securing domain models? [closed]

I'm have good resources on both security, domain modelling, and architecture patterns. I've noticed a distinct lack of any suggestion of how and where to integrate security into the systems I build. I ...
7
votes
4answers
1k views

Accessing Repositories from Domain

Say we have a task logging system, when a task is logged, the user specifies a category and the task defaults to a status of 'Outstanding'. Assume in this instance that Category and Status have to be ...
3
votes
1answer
582 views

Domain Models (PHP)

I have been programming in PHP for several years and have, in the past, adopted methods of my own to handle data within my applications. I have built my own MVC, in the past, and have a reasonable ...
8
votes
3answers
380 views

Resources for popular domain models

I have come across many situations where I had to build a system for a library or a clinic or other popular domains. The thing is a domain model for a library was probably done 1000 times already with ...
1
vote
2answers
349 views

Are factors such as Intellisense support and strong typing enough to justify the use of an 'Anaemic Domain Model'?

It's easy to accept that objects should be used in all layers except a layer nominated as a data layer. However, it's just as easy to end-up with an 'anaemic domain model' that is just an object ...
4
votes
2answers
535 views

Justification for bidirectional relationship

I typically try and avoid bidirectional relationships at all costs. Recently I've been trying to follow a more domain centric design philosophy and I'm looking for advice in the best way to solve a ...
5
votes
2answers
929 views

Are Persistence-Ignorant objects able to implement lazy loading?

Persistence Ignorance is an application of single responsibility principle, which in practice means that Domain Objects (DO) shouldn't contain code related to persistence, instead they should only ...
3
votes
2answers
327 views

DDD: Developing the Domain Model alone

In DDD examples it seems the common method for developing the domain model is to sit with domain experts and iterate over versions of the model, say on a whiteboard, continually modifying it and ...
4
votes
2answers
316 views

How should I include third-party models in my domain model?

I'm currently trying to design a little application using Domain Driven Design but I'm afraid I don't really get the concept yet. Let me try to explain this as clearly as possible. public interface ...
9
votes
3answers
1k views

Are Domain Objects in Domain Driven Design only supposed to be write-only?

I've been reading about Domain Driven Design for almost two years and have been cautiously been introducing some concepts in to my daily work or at least making plans for how things I do regularly ...
5
votes
3answers
4k views

DDD with ORM where should the business logic go?

I have used an MDA (model driven architecture) tool in the past where we modeled via UML and this generated the business entities (our domain model) and the ORM (mapping etc) amongst other things. A ...
8
votes
1answer
429 views

Do ORM POCOs replace domain entities?

This is somewhat similar to this question but more broad. In general, with ORMs like EF 4.1 supporting POCOs, does it now make sense to have your domain entities be the objects that are persisted to ...
2
votes
1answer
286 views

Should the domain model include all the domain entities in my project?

I have currently reading Grails and I love it. In order to get hands on experience with Grails I decided to create a web application for some Management System. Ya as you can guess there are plenty of ...
45
votes
5answers
5k views

With all of these services, how can I not be anemic?

Where do we draw the line between delegation and encapsulation of business logic? It seems to me that the more we delegate, the more anemic we become. However, delegation also promotes reuse and the ...