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Friday, September 4, 2015 bootcamp

The DDD book I am reading has a section on reactive systems.  Searching about reactive systems led me to the bootcamp.  When my head starts pounding from reading too much DDD stuff, I start going through the bootcamp lessons.  They are a lot of fun, and I feel like I learning some stuff about Akka.  Not sure I am ready to use Akka at work but I bet in 5-10 years people will come to me and say "Why didn't you integrate our bounded contexts through Akka instead of NServiceBus?".

Bounded Contexts

Have a project coming up at work where we are going to create a separate DDD bounded context and integrate it with another bounded context.  I have been reading a bunch of books to try and figure out how I want to do this.

  • Building Mircoservices - This was a really interesting read and I learned a lot of useful stuff
  • Enterprise Integration Patterns - This one is considered the bible of integrating through messaging frameworks.  It felt it bit like reading an encyclopedia.  Maybe I shouldn't have tried to read it end to end and instead just used it as a reference.
  • Patterns, Principles, and Practices of Domain-Driven Design - I am still reading this one.  I would say this book is somewhere in between the other two books.  Not a light fun read but full a useful stuff and not quite as heavy as an encyclopedia.

Saturday, April 18, 2015

Possible way to covert part of JS application piecemeal

I like how they limit to three components and limit how those components interact.
Introducing T3: Enabling Large Scale JavaScript Applications | Box Blog

Saturday, March 7, 2015


This article describes something that sounds like CQRS and Microservices in terms of database concepts.

This is really smart since the people that would mostly likely resist this type of architecture change are the people that are most invested in relational databases.


This is allows you to write native apps with JavaScript. Very cool.

Would be interesting to compare this against

Tuesday, November 4, 2014

Next Version of C#

Watched this video  about the next version of C#.

We could use the code introspection features to validate our coding standards.  Also the nameof operator could be used in FluentNhibernate for mapping properties so when you rename your properties your mappings update.

Tuesday, April 8, 2014

CQRS Appendix

I finished the Appendix on CQRS in the book Implementing Domain Driven Design.

I really liked the appendix. It was written by a different author, and he provided very detailed code and explanations. There is even an example project on github.

I searched for my more information about the author and found a blog post where he mentioned Greg Young's Event Store. I didn't know this existed but it sounds pretty cool.

Monday, March 17, 2014

14 chapters down one appendix to go

I finished Chapter 14 on the Application of Implementing Domain Driven Design.

We have had the "What should go in a Application Service and what should go in a domain service" discussion here at work many times. At one point, the author claims I am going to clearly answer this question for you. I thought great I won't have to stress about that anymore. I feel like a broken record saying this but ... I was hoping he would give more details in his explanation because it still doesn't seem clear to me. What I got from what the book is that Application Services are for handling transactions and security. If you are doing more than creating an entity and adding it to a repository then you may have a "significant process" that needs to be modeled in the domain. He talked a little about Application Services that are for querying. I couldn't find any rules of thumb though about when your queries have too much business logic and should be domain services themselves. He did mention that sometimes you need to convert your application service into its own bounded context. I can think of one place in our code that might benefit from this idea.

There are no more chapters in the book. There is an appendix about CQRS written by someone else which I plan to read, but for the most part I am done with this book. I can't say I enjoyed reading it. I was really hoping it would answer a lot of questions for me, but I really don't think it did. I did some learn some things but not a whole lot. I guess the author's writing style just doesn't fit with how I learn. He probably knows a lot of stuff that can help me, but whatever reason I just didn't get that information from this book.