As we all know, JavaScript world is one of the fastest growing. New frameworks appear and soon after die because of capabilities or outdated solutions. The example here is knockout.js (which I really loved by the way) – an excellent MVVM framework with dependency injection, two-way data binding e.t.c which was eaten by Google’s child called Angular. In the meantime React JS happened and all these great frameworks like Ember or Polymer. In early 2016, all frontend geeks waited for the new awesome framewor...

As I announced in the last part, our CQRS/ES journey is almost finished! But before it happens we need to take care of read side of our application. However, before we move forward to the implementation, it’s worthwhile to explain why do we need a read side? After all, we have an excellent data source called Event Store which allows us to reconstruct every domain object in our system. What’s, even more awesome is the fact that we can „time travel” in our domain by not applying all events in our domain ob...

All right, after a few short breaks, I’m finally ready to continue our journey, during which we discover Command Query Responsibility Segregation pattern along with Event Sourcing. In a previous part, we discovered the role of events and ES in our application and to be honest we’re almost done! But before that, we need to focus a little bit on transporting our commands and events. That’s why today’s post will be dedicated the buses. Okay, let’s start!  RabbitMQ and EasyNetQ To accomplish our task, we n...

One of the cool feature in ASP.NET 5 (before renaming to ASP.NET Core) or more precisely in dnx was tracking all code changes without recompiling whole project (Microsoft used to call that In-Memory compilation). Why is that so cool? Well simply, it’s way more comfortable than it used to be, and it makes our development faster. Now the good news is that it’s not gone. I mean, if you run your .NET Core application (with Ctrl+F5, not F5) using IIS Express, you can change your code in Visual Studio, then sa...

Do you remember your first steps as a junior developer? Do you remember how you felt when you talked with experienced engineers? Do you remember what you said what you realized that commercial projects are way more complicated than those made in school? I do. It was more or less like „God, I suck… all these folks are just great. I hope someday I’ll be half as good as they. No… I WILL BE BETTER! And no one will have doubts about that.” Yes, I was sure that after reaching a certain level I would be master ...

It’s been a while since I wrote a JavaScript article, so here it is! Today we are going to reveal one of the biggest front-end mystery. How does async work in JavaScript? The question might seem quite obvious, but believe me that many developers think that it’s because of multi-threading. Well, here is the thing. Async does not require more than one thread. If you don’t believe me click here to confirm that. Ok, fine, let’s say that we need multi-threading to do async. But here comes the thing that confu...

Today we are going to have a little break from our CQRS/ES journey, but I hope you’ll like that article anyway. Meet Aspect-Oriented Programming! An approach that’s going to change the way of writing our code and more importantly will help us to keep it clean and simple (in most cases).  The idea Writing the code we can often observe that the certain group of the non-business functionalities is copied in many areas, and moreover, it affects other parts of our system. Here we can include: creating datab...

In the first part of our journey, we became familiar with CQRS and Event Sourcing. In this episode, we’re going to implement a few classes in our brand new system. Before we start let’s discuss a little bit about a business problem that we’ll try to model. At first, I thought about something very easy like a bookstore which would allow users only to buy some books. But that would be boring, wouldn’t be? By chance, a few weeks ago I received the kind of interesting recruitment objective from some company....

Couple days ago my friend during a job interview was asked to explain the concept of table partitioning in SQL Server. Tough one? To be honest, neither he nor I had never heard about that. After few hours of learning, I’m ready to present to you the idea. So, is that connected somehow with disk partitions in our computers? No exactly, but the concept seems to be quite similar (at least for me).  The idea As we probably all know, the relational database consists of tables (relations). Each one represent...

Wszystko co dobre kiedyś się kończy i nie inczej było z konkursem Daj się poznać. Dziś wraz z Emilią Szymańską i Michałem Wilczyńskim podsumowaliśmy nasze zmagania. Dowicie sie m.in co skłoniło nas do wzięcia udziału w konkursie , jak wyglądały nasze początki jako świeżo upieczeni blogerzy oraz jak Emilia w jeden dzień wyczerpała cały budżet na Dreamsparkowym Azure 😉 Zachęcam Was wszystkich do komentowania tego odcinka i dzielenia się własnymi przmyśleniami związanymi z konkursem   Nie pozostaje mi n...