Week 12, year 2014
- Small Uncontrolled Experiments - Update 2021-01-25: I used to call this “small controlled experiments”. It was a name that grew organically and it stuck. Nowadays, I believe they’re very much uncontrolled: a team is too small and a sprint is too short for anything remotely scientific. That doesn’t mean they’re not valuable. Emotions are data, and if people’s gut feeling after (after, not before!) doing an experiment doesn’t agree, the proposed change will not work well anyway. Impose time constraints on these experiments, but do allow them to be uncontrolled. [Mathias Verraes]
- Practical Event Sourcing - Video Slides Abstract Traditionally, we create structural models for our applications, and store the state of these models in our databases. But there are alternatives: Event Sourcing is the idea that you can store all the domain events that affect an entity, and replay these events to restore the object’s state. This may sound counterintuitive, because of all the years we’ve spent building relational, denormalized database schemas. But it is in fact quite simple, elegant, and powerful. In the past year, I’ve had the pleasure of building and shipping two event sourced systems. In this session, I will show practical code, to give you a feel of how you can build event sourced models using PHP. [Mathias Verraes]