The Weak Reference

The Weak Reference

Kurser i Domain-Driven Design - Våren 2012

Wednesday, September 24, 2008

One-day DDD Seminar With Eric Evans

Eric Evans returns to Sweden and Citerus to give a one-day seminar on Domain-Driven Design together with myself. It’ll be a day packed with great DDD content, don’t miss it!

One-day DDD Seminar with Eric Evans, November 4 2008, SAS Royal Viking in central Stockholm.

Register now!

Friday, May 23, 2008

New Citerus blogger!

There is a new Citerus blogger on the block, or in the cloud, or whatever.

Mikael Lundgren is finally online with - About lean product development:

Wednesday, April 23, 2008

Citerus Live! (part II)

As promised here are more speaking engagements for spring and early summer:

First up on June 10, you’ll be able to hear Mikael Lundgren give the key note "Organisera för lättrörlig utveckling" at Agile development 2008 in Stockholm.

Then, on June 11 you can hear me speak at the same conference about "Domändriven design - utveckling och design i ett lättrörligt projekt".

If you have an interstellar teleporter standing by you’ll also be able to catch Tobias Fors' presentation at Øresund Agile 2008 in Malmö ten minutes later on the topic "One Key Person - Experiences on effectiveness from five years of using, teaching and introducing Scrum"

Monday, April 14, 2008

Now Launching: DDD Sverige!

I am very excited to announce that we now have formed a Swedish user group for Domain-Driven Design: DDD Sverige. It was created as a joint effort by Dan Bergh Johnsson, Jimmy Nilsson and myself and currently lives on Internet as a Google Group. We are happy to invite people to discuss and share ideas and experiences from applying Domain-Driven Design.

We hope that we soon can arrange local gatherings where we can meet face to face, but until then I will be happy to see you at


Monday, April 07, 2008

Domain-Driven Design - nu på svenska!

In the beginning of June I will give Eric Evans' and Domain Language's DDD class Putting the Domain Model to Work in Swedish for the first time.

The class will be given in Stockholm.

Read more and register!

Sunday, March 02, 2008

Jfokus presentations now online

Presentations from Jfokus 2008 are now available. You'll find my presentation on the Specification Pattern as well as my collegue Peter Backlund's Grails presentation here. (in Swedish)

Windows + IE for success...

Thursday, February 28, 2008

Psychology of Golf

I used to play golf, this was a few years ago now. And I must say I consider Mark Twain mostly correct when he called golf "a good walk spoiled". One of the problems with the game, besides the fact that I sucked at it, is the way The Swedish Golf Federation has the handicap system set up. As soon as you beat your current handicap you get a new one, reduced with whatever number of strokes less you got compared to your current handicap, times some factor, initially 0.5. So, effectively, your current handicap becomes a record of that one time when you played your best game ever. But in your mind your handicap is the lowest expectation of what you should manage to play to. Not playing to your handicap will be considered a failure. So golf becomes a game of playing and failing, and failing, and FAILING!

Most of the time will be spent feeling worthless. But now and then you will actually manage to play to your handicap, which is a zero outcome, it’s expected. Rarely, you will manage to beat your handicap, which probably will make you feel a bit happy. Of course that feeling will be immediately erased next time you play, replaced with the feeling of worthlessness, because now you have a new handicap. Depressing.

Now, people say that as you get better the curve levels off somewhat, i.e. the conversion factor becomes smaller. But I never made it that far, so I never saw that side of the game.

OK, enough of a segue, this is what I want you to read: Psychology of Tests, Testing and TDD

Monday, February 11, 2008

Audio interview with Eric Evans

I had the opportunity to sit down and talk with Eric Evans a couple of weeks ago over Skype. The result is now available as a thirty minutes long audio interview on the topic of Domain-Driven Design published in PNEHM!

Audio interview with Eric Evans

Wednesday, February 06, 2008

Jfokus followup

Slides from the Jfokus 2008 presentation are now available for those of you who care.

Example source code and specification.jar are available from Google Project Hosting.

If you attended the talk please let me know if you have any questions or feedback.

Updated: Fixed spelling

Thursday, January 10, 2008

Citerus Live!

This spring there will be plenty of opportunity to meet and interact with Citerus' consultants!

We will be at Jfokus 2008 in Kista, Stockholm, January 30. Peter Backlund will talk about the Grails framework and I will give a brief talk about the Specification pattern. Citerus is also sponsoring Jfokus and you can meet us at our booth in the exhibition area.

Lena Norman and Mikael Lundgren will be presenting at the Lean & Agile Software Development conference in Stockholm Februrary 5-6.

We are currently discussing further speaking engagement for later this spring and early summer. Watch this space for more info.

Hope to see you there!