DDD states that you should only ever access entities through their aggregate root. So say for instance that you have an aggregate root X which potentially has a lot of child Y entities. Now, for some scenario, you only really care about a subset of these Y entities at a time (maybe you're displaying them in a paged list or whatever). Is...
Typical scenario. We use old-school XML Web Services internally for communicating between a server farm and several distributed and local clients. No third parties involved, only our own applications used by ourselves and our customers. We're currently pondering moving from XML WS to a WCF/object-based model and have been experimenting ...
I'm looking to push my domain model into a WCF Service API and wanted to get some thoughts on lazy loading techniques with this type of setup. Any suggestions when taking this approach? ...
Everyone I work with is obsessed with the data-centric approach to enterprise development and hates the idea of using custom collections/objects. What is the best way to convince them otherwise? ...
We have a simple domain model: Contact, TelephoneNumber and ContactRepository. Contact is entity, it has an identity field. TelephoneNumber is typical value object: hasn't any identity and couldn't be loaded separately from the Contact instance. From other side we have web application for manipulating the contacts. 1st page is "ContactL...
I've just finished reading Domain Driven Design and I'm enchanted with some of the ideas covered in it. Do you know any companies that implement ubiquitous language in their projects? ...
I have just started reading DDD. I am unable to completely grasp the concept of Entity vs Value objects.. Can someone please explain the problems (maintainability, performance.. etc) a system could face when a Value object is designed as a Entity object. Example would be great... Thanks ...
After reading Evan's and Nilsson's books I am still not sure how to manage Data access in a domain driven project. Should the CRUD methods be part of the repositories, i.e. OrderRepository.GetOrdersByCustomer(customer) or should they be part of the entities: Customer.GetOrders(). The latter approach seems more OO, but it will distribute ...
Has anyone read the book ".NET Domain-Driven Design with C#: Problem - Design - Solution" ? How is the book? ...
Could anyone explain me finally what is the best strategy to implement transparent and fluent support of multi-tenant functionality in NHibernate powered domain model? Im looking for the way, how to keep the domain logic as isolated as possible from the multi-tenant stuff like filtering by TenantID etc ...
So I got this question from one of the developers in my team: What is domain driven design? I could of course point to the book from Evans but is that actually an answer? How would you explain DDD in a few sentences to junior software engineers in your team? ...
We have our domain model declared in rusty old hbm files, we wish to move to POJOs annotated with the javax.persistence.* annotations. Has anyone had experience doing so? Are there tools that we could employ? ...
What are the best places to find out everything there is to know about Domain-Driven Design, from beginner to advanced. Books Websites Mailing lists User groups Conferences etc ...
I am looking for a Repository pattern implementation example/resource that follows domain driven design principles for my ASP.net MVC application. Does anyone have a good example or learning resource that can be shared? ...
I'm trying to understand the concepts behind DDD, but I find it hard to understand just by reading books as they tend to discuss the topic in a rather abstract way. I would like to see some good implementations of DDD in code, preferably in C#. Are there any good examples of projects practicing DDD in the open source world? ...
What is the differences and similarities between Domain Specific Languages (DSL) and Domain Driven Design (DDD)? ...
If you have a domain object, and you want to do something useful and central to that domain object's responsibility like ensure it is valid, you sometimes need to access the state of related objects in order to perform this validation. How to avoid the domain object needing to call out to a Repository or Data Access Layer? You can't al...
We're working on a rich client (written in Flex) that is connected to a Java backend, using both RMI and JMS. I was thinking about implementing the client in a DDD fashion so that it has Repositories for the CRUD operations on the domain objects. The problem is however that all backend communication happens asynchronous and there is no ...
So, I have a nice domain model built. Repositories handle the data access and what not. A new requirements has popped up that indicates that reasons need to be logged with deletes. Up until now, deletes have been fairly simple => Entity.Children.Remove(child). No internal change tracking was happening as my ORM tool was handling stat...
Context: So, I am attempting to build a ridiculously complex domain model. Talking with the users, there are multiple ways the system will be used (For example: one way is from the perspective of the employee; another way is from the perspective of the employer). In actuality, they are multiple applications reusing the core domain. ...