Sponsor: Interested in learning more about Distributed Systems Design? Enter for a chance to win a 5 day Advanced Distributed Systems Design course led by Udi Dahan founder of Particular Software, and creator of NServiceBus.
Keep it simple. There isn’t much of a need to go out of your way adding extra layers of abstraction. Any data access framework or ORM you might be using will already be creating a good enough level of abstraction. With linq (IQueryable) being implemented in NHibernate, Entity Framework, or Linq to SQL, ORM du jour, you already have your a level of abstraction to your data source.
Need to query your read model from the client? Single page application maybe? Ok… you need one more layer. OData to the rescue. WCF Data Services provides an incredibly easy implementation with Entity Framework. ASP.NET Web API does have an OData implementation but has limitations.
Keep it simple:
- Data Source
- Data Access Layer (ORM)
- OData Layer – only if needed if client is making the query
- Client