Tag Archives: UML

Singleton Design Pattern – Sequence Diagram

Posted on 29/04/2012 by

Last semester I taught an undergraduate course on system analysis and design using graphical modeling (UML and OPM). I decided that one important subject the students should learn (and was not taught in previous semesters) was design patterns. Although I already knew some of them, I searched for some place where there is a full reference of the most popular design patterns, what are their uses and how they should be implemented. I found some sources, one of them obviously Wikipedia, but the best one (in my view) is sourcemaking, which gives good explanations and examples. Another great source was the … Continue reading →

Posted in Programming | Tagged , , , , | Leave a comment

UML Superstructure 2.4.1, Page 327: “An activity execution represents an execution of the activity”

Posted on 15/01/2012 by

I thought an activity execution meant cutting the activity with an axe in front of the whole townspeople and then singing “long live the king”… But now it is clearer. Thanks. Really.

Posted in Programming, Thoughts | Tagged , | Leave a comment

Is UML for Real?

Posted on 14/11/2011 by

I’m teaching this semester a course on software analysis and design, with special emphasis on software system modeling. Obviously this means that I am teaching UML, because it is the standard in the industry… But the more I’m teaching the more I’m learning, and the more I’m learning the more I’m despising UML. My first lecture is on Use Cases, a subject that haven’t touched for quite a while. I remembered learning use cases some 12 years ago when I was an undergraduate and it was fairly simple: you have a stick man, you have an ellipse which is the … Continue reading →

Posted in Programming, Thoughts | Tagged , , | Leave a comment