Build Stuff 2018

Everything was prepared. The features were in place, the critical bugs were fixed, the environments were up and running and the test were green. We were finally about to go into production with the system we had been working so hard on for the past 18 months.

We had deployed in Azure with redundancy, fail-overs and slots using continuous delivery. The customers had been doing acceptance testing for weeks. We were ready!

Then it happened.

Three days before going into production, the pipeline started halting. The applications crashed one by one. First the development environment, following the test environment. Then the staging environment and last; the production environment. No exceptions or logs pointing us in the direction of the problem.

We had three days to pin down and fix it.

This is a war-story about how we turned our Azure environments upside down, logged, debugged and at last, found the nasty bug and fixed it.

The story of my smart home system, all the way from the original idea to today, everything from designing the system, getting the hardware, dealing with the home existing electrical system and more

Event sourcing is becoming ever more popular these days. May people heard about it on different conferences but not so many have tried. It seems to be too complex at first. Experts shout - here be dragons, only sue this technique when you have to. In fact, event sourcing can solve many challenges that many business domains have in terms of technical implementation. In DDD we moved towards behaviour-first approach after many years of struggle with domain models being our data models. Event sourcing finally allows us making behaviour visible and persistent. But you need to get some hands-on experience and all those little things that no one tells you about, before getting serious about event sourcing. During this workshop, Alexey and Sergio will gradually bring more clarity to implementation techniques of an event sourced application, touching upon domain analysis, defining events, entities and value objects, persisting events and using projections. You will also learn the basics about distribution, integration and task-based UI. All the code will be in C# and some JavaScript.

Please ensure that you know what Event-Sourcing, since we won't be spending much time on the theory and will jump to writing code as soon as we can.

If you plan to follow the code, please check the requirements here: https://github.com/alexeyzimarev/PrepareForEventSourcingWithCsharp