The first DDD Open Forum of the brand new Paris DDD meetup was last night, hosted by Arolla, and it was good to meet again after a long time with twenty-some Paris DDD aficionados! @tjaskula, the organizer of this new group, opened the evening with a welcome introduction. He also gave many suggestions of areas for [...]
Principles for using annotations
déc 14th, 2009
Deciding where and how to place the annotations is not innocent. The last thing we want is to create extra maintenance effort because of the annotations. In other words, we want annotations that are stable, or that change for the same reasons and at the same time than the elements they annotate. This article suggests [...]
How I became enthusiastic about patterns
oct 1st, 2009
In my very first job, I was doing R&D, working on a map-matching algorithm. The goal of this algorithm was to pinpoint a moving car on a vector map, based on the data from various sensors, including a GPS, an electronic compass and the car odometer. Such algorithm was essential for the business of the [...]
Composite patterns, such a the Bureaucracy pattern, are patterns built by the composition of other « smaller » patterns. However even usual design patterns can be considered composite patterns made of smaller subpatterns. The goal is therefore to find out which are the main subpatterns that enable to reconstruct as many design patterns as possible. The subpatterns [...]
New: Java API for UML diagrams
déc 7th, 2008
As part of the Patternity effort, I spent some time creating a simple Java API to generate UML diagrams programmatically from Java, in SVG format. This small API called for now Patternity Graphic is working and available here: patternitygraphic_src as a source Zip (alpha release of course). It can render small class diagrams with hierarchic, [...]
Documenting the design of software using patterns?
jan 15th, 2008
I have experimented an approach that considers every design pattern as the recursive composition of smaller patterns. This led to a prototype tool to illustrate its benefits by generating design-level documentation of annotated source code. Eat your own dog food The source code of this tool itself was used as the code base to apply [...]
UML is a too low level language
mar 15th, 2005
I recently taught design pattern to 20 of my co-workers in a kind of training session, here are some thoughts I had while preparing this presentation… In OO you usually end up with many classes, especially when you correctly use design patterns; each class is also generally very simple and rather short. Thus classes are [...]
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