Most complex tasks are solved using abstractions. To create an abstraction one groups lower-level concepts, what I will call primitives in this text, and make them interact in a pre-defined way.
Abstractions are present at all levels in a system. Computers work based on electric signals. To reduce the Essential Complexity we abstract those signals with […]
Last week, Cauê and I were refactoring some classes in our systems and faced an interesting situation.
In our application we have a notifications system. It is quite simple; notifications are read from a text file and shown in a small information box in the home page. The MVC controller –it’s a Java application and we […]
Weeks ago, some people in the Ubuntu community got a bit disappointed with the distribution’s core team:
> We are supposed to be a community, we all use Ubuntu and contribute
> to it, and we deserve some respect regarding these kind of decisions.
> We all make Ubuntu together, or is it a big lie?
We all make […]
Over the past years I’ve held many workshops on Domain-Driven Design. We had more than one hundred people on those sessions, and feedback was often pretty good. After my last run I told my business partner that this was my last time running those workshops.
I think that Domain-Driven Design is one of the most […]
I’ve been extremely busy with project after project in the past few months, leaving me no time to do any research and/or play around interesting things. Even though I prefer to write about what is really interesting me at a given moment, I think that writing about some smaller/simpler problems and solutions would be better […]
As I said here before I was in Brazil some weeks ago to present at a conference. I had a really great time over there with some amazing people and would like to thank Caelum for their hard work in creating such a great conference. I’m making the slide deck and notes available in my […]
After so many years I thought that this was a dead topic but recently I saw at least two reasonably experienced developers having trouble with object identity and thought that it would be good to write about it.
Most languages define some kind of equality operator on objects, in Java, for example, that is the equals […]
In ThoughtWorks we get together at least once an year for a whole weekend to drink beer and do whatever people consider interesting. This year’s ThoughtWorks Australia Away Day (AKA Team Hug) was somewhere in Victoria and among other activities (and a bus crash) we had technical sessions.
I used one of those slots to do […]
If you follow this blog then you probably know that one of current interests is expressive design, either using Domain-Driven Design or Domain-Specific Languages. Here is a presentation about this topic.
One of the tricky things about expressive code is that it is very hard to see how noisy a code base is. What I found […]
Some weeks ago I joined a handful of ThoughtWorkers invited to test the new Google AppEngine’s Java API. Unfortunately I had a project requiring a lot of attention during most of this period but once back on the beach I found some time to play around with it.
Cloudy Skies
Google AppEngine (GAE) is Google’s shot in […]
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