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CQRS

Mediator Pattern with Hangfire

I’ve run into situations where I need to perform actions requested by the client that may take a bit of time.  The length of time could be variable and I don’t want to have the client waiting for a response.  Let’s take a look at using the Mediator Pattern with Hangfire as a solution to this problem. In a Web API scenario, the request may come in as a PUT or POST from the client. The API would validate the request, send the task to a queue and then return the client a 202 HTTP status code. The request has been… Read More »Mediator Pattern with Hangfire

Validating Commands with the Decorator Pattern

This post is how I have manged to handle validating commands and queries and belongs to a series about different aspects of applying CQRS Although these examples are demonstrating usage in commands, they are aslo applicable to queries. Examples are using using MediatR to handle our requests. If you are unfamiliar with CQRS or MediatR, here are some other relevant posts: Organize by Feature Thin Controllers with CQRS and MediatR Query Objects instead of Repositories Mediator Pattern using MediatR and Unity Feature First let’s take a look at our feature for Changing a Customers Pricing Level.  In this example I’ve organized… Read More »Validating Commands with the Decorator Pattern

Organize by Feature

This post is about how I organize by feature.  Features being my commands and queries. If you have not familiar with CQRS, it may be worth a look at some of my other posts to get some Context. Thin Controllers with CQRS and MediatR Query Objects instead of Repositories Mediator Pattern using MediatR and Unity  Layers What I found interesting was as I moved from thinking about layers to thinking about features and vertical slices, I didn’t immediately organize my code that way.  I would still organize my code by what it represented (eg layer). My project structure would look something like this:… Read More »Organize by Feature