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Showing posts from August, 2014

A CQRS Implementation with ASP.Net MVC and Entity Framework

Previous posts in this seriesIntroduction to the series.Considering a CQRS approach with ASP.Net MVCEven a quick read of the various blog posts and other web based information on using CQRS with .Net reveals it can mean a lot of things to different people. To my understanding, at scale, it's a recognition that your read and write operations are likely to require quite different approaches. Reads for example may be coming from denormalised or cached information, and writes might go to queues for subsequent processing. Which is all a bit removed from a more basic CRUD approach where we simple read and write to the database.In truth though, I didn't need - at least yet - these type of performance improvements. Nonetheless, there remains value for me even in a smaller-scale application in handling query and command operations more distinctly. Which really means in practice that rather than having a service and/or repository layer that provides methods such as GetCustomers, Ge…

CQRS, Rich Domains and Unit Testing with ASP.Net MVC and Entity Framework

Having spent a bit of time working on CMS (Umbraco and EPiServer) based projects, I recently had to come back to building a custom ASP.Net application using the MVC framework. Before commencing I took a bit of time to read around, and re-think some of the ways I've built applications like this previously, in terms of how the solution is architected.Previously I've put together a fairly strict three layered architecture - data access layer using Entity Framework, wrapped in a unit of work/repository pattern; a business logic or service layer, and the presentation web application. Which worked quite nicely in truth, but there's always value in re-looking at such things and seeing how they could be improved. And where's the fun in doing things the same way each time anyway!In particular I was keen to investigate:A CQRS style architecture, where we work with distinct query and command objects, in a more "slices over layers" fashion. This breaks the applicatio…

Using Umbraco Mapper with Archetype (Part 2)

In the previous post I discussed a method of mapping property values from the Archetype package to a view model using Umbraco Mapper. There was still a remaining issue of how to handle picked content.With the version of Umbraco Mapper 1.4.7 (just updated on our and NuGet) this is now possible with just some changes from the method noted in the previous post.Firstly, you will need to have the Umbraco Core Property Value Converters package installed. If you are using Archetype you'll likely be using this already, but it's needed here to convert the values returned from Archetype node picker properties to either IPublishedContent (for single items from a content picker) or IEnumerable (for multiple items from a multi-node tree picker).Then extending our previous example, let's say we've added fields to our "Football Match" archetype to have a content picker for the match report, and a multi-node tree picker for match reports from previous games.Our view model …

Using Umbraco Mapper with Archetype

A post came up today on the Umbraco forum discussing use of the Umbraco Mapper package I've built with colleagues at Zone, and everyone's favourite new package, Archetype. We haven't had chance to work with Archetype as yet, but are planning to use it on an upcoming project, so it seemed a good idea to work out the best way for these two packages to play together.It's a little tricky to begin with as Umbraco Mapper is primarily about mapping from IPublishedContent - single Umbraco nodes or collections picked from a node picker or pulled together via a node query - to strongly typed view models.However it also supports mapping from a simple dictionary of strings and objects - Dictionary<string, object> - and that, along with the ability to define custom mappings for a particular view model type, means this can be done fairly cleanly.Note: haven't found a clean way to handle picked content yet - e.g. from content picker or multi-node tree picker... will update…