February 2009 - Jak Charlton - Insane World

Jak Charlton - Insane World

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I got bored yesterday, and decided to change my name ... from now on I will be using my middle name, Jak, instead of Casey

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DDD: Why Have I Gone All Quiet?

The series of posts here was starting to get rather frantic, and I realised that I was swamping devlicio.us and all the other bloggers, and that the comments and discussions were becoming fragmented across multiple blog posts. So I figured I would pause...

Published 02-26-2009 10:51 AM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Living In The Enterprise

No, not that Enterprise! The other Enterprise – the big amorphous one that organisation spent a fortune putting SOA around. Domain Driven Design appears to be at odds with large scale distributed systems, it is after all methodology to design and...

Published 02-21-2009 9:25 AM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: The Repository Pattern

I seem to have taken a fairly long time to get here, and it has been mentioned in passing, but now we get to the last major part of the Domain Driven Design picture – Repository . In traditional architectures, your application talks to some kind of database...

Published 02-20-2009 8:30 AM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: What Kind of Applications Is It Suited To?

In many conversations, and in many comments here, you hear phrases like “well that’s not really suited to DDD” or “DDD isn’t the best fit for that problem”. You even see those kind of comments on my blog, and often they are posted by me. This obviously...

Published 02-18-2009 7:20 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Services

There can be no word more common in development, and no word used for such a multitude of different things as “service” It was therefore unfortunate that Eric Evans introduced yet another concept of Service in DDD, one which has since been referred to...

Published 02-17-2009 9:38 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Aggregates and Aggregate Roots

Download the eBook of the Series so far … We are family I got all my sisters with me Sister Sledge Some things belong together, like Apple Pie and Ice Cream, or Sonny and Cher. And so it is with Entities and Value Objects (VOs) – some of them belong together...

Published 02-16-2009 2:50 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Download an eBook of the Series

To save you lots of clicking backwards and forwards as each part of this series on Domain Driven Design appears, I am going to collate the posts along the way into a downloadable PDF format. The parts so far can be downloaded from here UPDATE: This link...

Published 02-15-2009 8:59 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Where is the Code? Another Brief Interlude

Right about now I can hear murmurs, "I haven't seen any code yet" That is because I view Domain Driven Design firstly as a design methodology, secondly as an architectural style, and lastly as some great software patterns. I don't believe...

Published 02-14-2009 5:28 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Entities and Value Objects

Finally, after 5 posts in the series, we get to the beginning point, the basis of all things… Entities and Value Objects . OK, maybe a small exaggeration, but Entities and Value Objects (VO) form the core building blocks of Domain Driven applications...

Published 02-13-2009 3:10 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD : Command Query Separation as an Architectural Concept

There has been some confusion recently around a recent evolution of DDD, the idea of Command Query Separation (CQS) at the architectural level. This post is yet again jumping ahead into the “advanced” stuff, so go ahead and skip this if you just want...

Published 02-12-2009 4:40 PM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: A Short Interlude

Ya know, I blog partly because I like the sound of my own voice, and partly because I like to try and impart knowledge I have obtained to others. I also like to blog as it helps me formulate ideas and concepts in my own mind, and to have those concepts...

Published 02-12-2009 3:19 PM by Jak Charlton

Filed under: Rants, DDD
DDD: There Is No Database

Do not try to bend the spoon; that's impossible. Instead only try to realize the truth: There is no spoon. The Matrix Again prompted by discussion on the DDD Yahoo list, this post is intended to explain what on the face of it is a pretty dumb assertion...

Published 02-12-2009 7:27 AM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: Bounded Contexts

It was brought up indirectly in a comment on my last post … the idea of a Ubiquitous Language (UL) seems like it is too all encompassing. Indeed it is – unless you are working on a very simple application, one language just isn’t enough. Not only that...

Published 02-11-2009 8:38 AM by Jak Charlton

Filed under: Practices and Principles, Architecture, DDD
DDD: The Ubiquitous Language

Britain and America are two nations divided by a common language (George Bernard Shaw / Oscar Wilde) It could be said that the business and developers are two nations divided by a common language. If you listen to conversations between developers and...

Published 02-09-2009 12:01 PM by Jak Charlton

Filed under: Practices and Principles, DDD
Domain Driven Design: A Step by Step Guide

There is a lot of interest in DDD recently, both in the book, and in the methodology, and in the buzzword. As a book and methodology, DDD is an excellent way to approach complex software problems, and make them far more understandable and manageable....

Published 02-09-2009 8:21 AM by Jak Charlton

Filed under: Practices and Principles, DDD

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February 2009 - Jak Charlton - Insane World

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DDD: Why Have I Gone All Quiet?

DDD: Living In The Enterprise

DDD: The Repository Pattern

DDD: What Kind of Applications Is It Suited To?

DDD: Services

DDD: Aggregates and Aggregate Roots

DDD: Download an eBook of the Series

DDD: Where is the Code? Another Brief Interlude

DDD: Entities and Value Objects

DDD : Command Query Separation as an Architectural Concept

DDD: A Short Interlude

DDD: There Is No Database

DDD: Bounded Contexts

DDD: The Ubiquitous Language

Domain Driven Design: A Step by Step Guide