The onion-architecture tag has no usage guidance.
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Clarification on the Onion architecture's Domain Service and Application Service
I am studying Onion Architeture but i got some doubts:
All the samples (github) I found over internet are too simple, or are implemented under DDD (which I have not studied at the moment) so I can ...
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Should the Aggregate Repository in DDD be in application or domain layer? [duplicate]
In DDD I keep finding contradictions depending on which book/blog I look for information.
In my project I have the repository interface (port) and its implementation in the application layer. It is ...
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2answers
91 views
What data should a repository return
I have a simple project where the controller calls the service, and the service calls the repository in order to get the needed data.
Assuming that we have these domain models:
// this model has a ...
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2answers
59 views
Application service - part of Bounded Context?
I am having a hard time understanding where the Application Services fit in with DDD and Onion architecture. Up until a few days ago I thought of them as part of domain model, but I began to question ...
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3answers
361 views
Onion architecture: layer placement of business logic
Where should the business logic for a project that utilizes Onion Architecture be placed?
In my case, it's a C#-based project, utilizing Web API and possibly a MVC UI for the presentation. But ...
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1answer
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Can one app have several “subdomains” in DDD?
General Context
I started reading about layer based architectures like DDD, Onion, Clean Architecture etc. I am considering switching, but am currently unclear about how strict the "first level ...
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0answers
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Should I pass presenter to use case when implement clean archeiture using scala
This question came to me when I was trying implement Clean Architecture using Scala, and come across this post.
In the accepted answer, @candiedorange emphasis on the separation of responsibility, ...
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1answer
490 views
Is there really such a thing as the onion architecture?
Note: BLL = Business Logic Layer (can also mean your domain)
I'm trying to understand the onion architecture. It seems to me that it's actually the same thing as the layered architecture, only with ...
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2answers
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Does a framework like the Spring Framework fall under the Data Centric Architecture?
With all the talk of Microservices with Domain Driven Design, I have been looking at two architectures, the Database-Centric Architecture and the Domain-Centric Architecture (Not to be confused with ...
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1answer
123 views
How to realize “Tell, don't ask” in an Onion-Architecture for data analysis
I am currently thinking about how I would implement a software I did write some years ago with a Clean-/Hexagonal-/Onion-Architecture. This shall not be a "Grand Redesign from Heaven", since I'm not ...
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0answers
176 views
Putting UnitofWork handler in the Request Model for DDD with Clean architecture?
I'm rearchitecting a system in Python, using SQLAlchemy for the data mapping layer, and the Zope Component Architecture for dependency injection and interface declaration. I am in the process of ...
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1answer
382 views
Where should I place configuration classes in Onion Architecture
We are redesigning one of our API projects from an n-layered architecture into onion architecture. In the previous design, we had configuration classes in a common library project being referenced ...
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How to structure an Onion project
Here is an example implementation using Onion architecture: https://www.codeproject.com/Articles/1028481/Understanding-Onion-Architecture
The webpage suggests a solution structure of:
Domain - ...
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2answers
163 views
Domain Interface references NHibernate?
Please see the question here, which I asked yesterday: Domain Driven Design in an Onion Architecture
As stated I understand that DDD is an approach that targets the domain layer only and Onion is an ...
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3answers
896 views
Domain Driven Design in an Onion Architecture
I recently asked this question: Should the domain layer be dependent on NHibernate?
I have read a lot of questions today, where answerers state that the Domain Layer should only contain Business ...
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1answer
95 views
Should Active Directory access respect my software architecture?
I have a solution with an onion architecture using an asp.net MVC project. I also access Active Directory, and was wondering if one needs to loosely couple Active Directory access? Say I have :
...
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3answers
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Clean Architecture: Use case containing the presenter or returning data?
The Clean Architecture suggests to let a use case interactor call the actual implementation of the presenter (which is injected, following the DIP) to handle the response/display. However, I see ...
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2answers
3k views
How to structure a Domain Driven Design in an Onion Architecture?
I am studying Domain Driven Design and was introduced to the concept of Onion Architecture, which uses the terms of Core, Domain, API, and Infrastructure.
I am from Java background and am familiar ...
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1answer
182 views
What should I consider when moving a project using Entity Framework 6 from SQL Server to MySQL or PostgreSQL? [closed]
First, I need to confess this question come mostly from the still expensive licensing model used by Microsoft for SQL Server Standard. Also because Web edition is now only available through Web ...
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2answers
684 views
Architecture: How to pass models between controllers, services and repositories
I'm trying to build an architecture where I have a Domain project with all my domain models, an Infrastructure project with my Services and Infrastructure.Entity with my Repositories and entities.
...
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1answer
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Onion architecture vs 3 layered architecture
I see only benefits to the onion architecture over the 3 layered architecture where the BL had responsibility to call methods on DAL (or an interface of DAL) to do CRUD. The onion has better ...
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2answers
690 views
Onion architecture design question
I recently started working on a new project where the team was considering use onion architecture, which I was not very familiar with, so I started reading about it.
The application is a simple 3D ...
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2answers
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Where should you validate the state of “other” aggregates?
Scenario:
A customer places an order, then, after receiving the
product, provides feedback on the order process.
Assume the following aggregate roots:
Customer
Order
Feedback
Here are the business ...
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2answers
1k views
why exposing service instead of repository in onion architecture
I'm digging on how to structure projects and so I stumble into Onion Architecture. As to how I understand it, its more on a domain-centered-focus architecture instead of a database-driven type.
I'm ...
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1answer
575 views
Onion architecture and independence
Trying to understand onion architecture. As I understand it, there is different opinions about the names of the layers.
In this post I refer to the layers as: infrastructure -> api -> domain -&...
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3answers
545 views
How to best encapsulate features in software design?
I like domain driven design, and onion design. However I would really like my features to be encapsulated. If i check out some legacy code and I need to investigate some specific feature the best ...
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4answers
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Lookup Tables: Are they a leak in the domain model?
You are building a system that keeps track of Companies. Those companies have Contacts. Those contacts are often specialists that only answer certain types of questions, such as Billing/Payment, Sales,...
