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Sponsor: Using RabbitMQ or Azure Service Bus in your .NET systems? Well, you could just use their SDKs and roll your own serialization, routing, outbox, retries, and telemetry. I mean, seriously, how hard could it be?

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CQRS

Service Bus for Windows Server

Move over MSMQ, Service Bus for Windows Server was recently released.  Apparently it has been for awhile now (Oct 2012 release).  I’m just late to the party I guess. Service Bus 1.0 was designed to allow for enterprise messaging capabilities in a Windows Server-based environment.  It enables you to build, test, and run loosely-coupled, message-driven applications in self-managed environments and on developer computers.  The two primary features are Service Bus Queues and Service Bus Topics and Subscriptions. Service Bus Queues offer reliable message storage and retrieval with a choice of protocols and APIs. Use Service Bus queue in your application to provide load leveling by having the… Read More »Service Bus for Windows Server

Event Sourcing: Eric Evans Interviews Greg Young

I follow Eric Evans (@ericevans0) and Greg Young (@gregyoung) on twitter.  I really respect their opinion and knowledge. Eric tweeted about an interview he did with Greg over 5 years ago about Event Sourcing.  It’s great to hear Greg describe how Event Sourcing fits with DDD concepts.  This is video is one of the first Event Sourcing + DDD talks that I’m aware of.   I highly recommend checking  it out. http://www.infoq.com/interviews/Architecture-Eric-Evans-Interviews-Greg-Young If you are new to Event Sourcing, here is a snippet from Martin Fowler article. Capture all changes to an application state as a sequence of events. We can… Read More »Event Sourcing: Eric Evans Interviews Greg Young

CQRS: Read Model

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… Read More »CQRS: Read Model