I’m always on the lookout for some interesting sequence diagrams, so I was excited to see yours above. I think it’s neat you’re using SD’s in your blog to explain what’s going on.

I’ve created Trace Modeler, a tool to quickly and easily create UML sequence diagrams (see http://www.tracemodeler.com). I’m especially interested in how sequence diagrams are used for web apps, because of their asynchronous nature.

Anyway, about the diagram : I’m a bit confused about the long activation of the Effect instance and don’t understand who calls some of the methods (for example, are ‘initialize’ and ‘cancel’ really self-calls?).

I’d like to help you get the diagram just right (and perhaps even expand it a bit) and in doing so learn a thing or two about SD’s in an AJAX context.

Let me know if you’re interested!

Best regards,
Yanic