Local translation table
It’s quite to common to use GUIDs as a unique identifiers across systems as they are… unique :) The GUID generation algorithm has a very important property: it’s local. Your...
Processes and The Cone of Uncertainty
The Cone of Uncertainty is a management phrase describing the fact, that we cannot foresee the future of a project with a constant probability. The longer period we want to...
I think therefore I haven't written a test
It seems to me that veryfing one’s thesis is one of the most important aspects of software engineer work. Quite often phrases started with ‘it seems to me…’ or ‘think...
From domain to code
Currently I’m helping to model one domain with Event Sourcing. A few days ago we spent ~15 minutes on modelling some cases on the whiteboard. The result of the first...
Values, principles, then processes
The presentation of Pawel Brodzinski published on Infoq here is a must see. Whether you’re into Kanban or not, it shows a few simple cases and discusses the three important...
Zone, where are you?
I love working in the zone. I find this flow extremely productive and exhaustive the same time, but if one asks is it worth to go in There, my answer...
Do we really need all these data transformations?
Applications have layers. It’s still pretty common to see an enterprise application being built with layers like DAL, Business Logic (or Domain), Services, etc. Let’s not discuss this abomination itself....
Imperative exceptions
If you develop software in .NET, you probably use exceptions. Or at least, handle them, even by simply logging. Beside providing an easy way to deal with runtime errors, exceptions...
Events visibility vs streams visibility
In my recent implementation of a simple event sourcing library I had to make a small design choice. There are streams which should be considered private. For instance, there’s a...
Aggregate, an idempotent receiver
In the previous post I covered the process manager subscribing to and consuming events from multiple sources. Additionally, it was show that saving the position of read logs after performing...