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Hi, my name is Marco. Working as a Senior Software Architect at Philips. This blog is statically generated using Next.js.

I wrote my first blog March 2011. Mostly I'm writing on software development. In total I wrote 70 articles in 6 categories. Use search below to filter by title or click a category or tag to filter by tag or category.

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Cover Image for Recap my online year 2012

Recap my online year 2012

Marco Franssen

Marco Franssen /

The year 2012 was for me a year that went way to fast. In the year 2012 I learned a lot new stuff, wrote several blog posts and read lots of blog posts and articles. First of all I want you to give a list of all blog posts I wrote this year. You can find the complete list here http://marcofranssen.nl/2012/ and here http://marcofranssen.nl/2012/page/2/. JavaScript http://marcofranssen.nl/writing-modular-javascript-without-polluting-the-global-namespace/ http://marcofranssen.nl/knockout-js-mapp…

Cover Image for Auto retry concurrent commands with ncqrs

Auto retry concurrent commands with ncqrs

Marco Franssen

Marco Franssen /

In a previous post I showed you some pseudo code Gregory Young mentioned in his DDD CQRS course I attended in Krakow, Poland. In this course Greg made clear to us locking of databases isn't necessary. He showed us some pseudo code how to easily write a merge handler to handle all concurrency conflicts. In my current project, based on the ncqrs-framework I implemented a simpler version of this merge handler which only retries each command if a ConcurrencyException occurs. To achieve this you can…

Cover Image for Pitfall in FakeItEasy

Pitfall in FakeItEasy

Marco Franssen

Marco Franssen /

The current project I'm doing is a CQRS based project, using the ncqrs framework. Today I came to a phase I needed some mocking done for some of my domain services. I choose FakeItEasy to handle this for me. So I started by just adding a reference to my DomainScenario project using a Nuget package. For some of my complexer scenario's I ran into some issues which took me about about 45 minutes to fix one of my tests. For fixing all other failing tests I had to do the same trick. Before I explai…

Cover Image for Lessons learned when applying DDD CQRS

Lessons learned when applying DDD CQRS

Marco Franssen

Marco Franssen /

While I was trying to apply DDD in combination with CQRS I learned myself some good lessons. I was trying to apply this in an agile approach, using the project method SCRUM. I started the project by translating all use-cases to smaller user stories. Based on this user stories I defined a first sprint. In the first sprint I didn't had or make a design for the complete domain. So I wasn't completely sure if I made the right decision for the 'aggregate root / bounded contexts' needed for the firs…

Cover Image for Some notes on the DDD/CQRS Course

Some notes on the DDD/CQRS Course

Marco Franssen

Marco Franssen /

In this blog post I work out some of the notes I made in Greg Young’s DDD/CQRS course in Krakow Poland. In Domain Driven Design there are some important things to think about. In DDD we make a difference in the following components. Aggregate Roots Entities Value Objects An Aggregate root is a set of multiple things that belong to each other. The aggregate should have a name that describes the whole. To come to a domain driven design you should take the following steps: Denormalization T…