In my very first post, I showed how to use DynamoDB in .NET to receive single result (post). Looking into the evolution of API and layers of abstraction, we have much more options to query AWS DynamoDB. Therefore we have 3 ways to query and read results which I will demonstrate in this post. The …
SQL vs NoSQL – when to use which?
My neighbour asked me today: SQL was built on integrity and consistency, and it scales up. NoSQL is designed for geographical distribution and speed, and it scales out. What I don’t get is why don’t we always use NoSQL for everything? When the traditional SQL db is more beneficial ? Typical SQL database is designed …
NBomber with C# and .NET 5
NBomber is a .NET framework for load testing of many kinds of services including web, queues, databases etc. Unfortunately it is not open source but there is free version. It is pretty well documented for F# and a bit worst for C# however it is pretty easy to take F# sample and write the same …
SOAP, REST, gRPC and GraphQL – various ways of API design
API stands for Application Programming Interface which defines the way how it is possible to communicate with the system. In this article, I put focus on web technologies and their implementation in .NET. Across many years, new design of APIs appeared in reply to new challenges, especially performance and implementation’s efficiency. Very first modern approach …
AWS Solutions Architect Associate exam preparation
As I started work with AWS and I will spend with it some more time, I decided to take the exam AWS Solutions Architect Associate. A prerequisite for this exam is 1 year of experience with AWS. Full list of requirements can be found here. An exam itself is composed of 65 questions with single …
Apache Kafka secure setup
At one of my projects, I was trying to set Kerberos authentication (SASL_SSL). It seems that it’s the hardest possible approach to set up. Moreover I was working on localhost in an enterprise network which did not simplify work. So after few weeks of fighting I ended up with knowledge that: Documentation is quite precise …
Alternative hobbies for software developers
Typically software developers are coding after the job. If you’re not a software developer, you may be surprised, but we’re really doing this! But… we also do a bunch of other fancy things including home automation, travels, photography, riding bikes and motorcycles, shooting etc. The most crazy hobbies of my mates who works in IT: …
Unit tests: code coverage – line coverage vs branch coverage
Quite often we can meet with a statement that code coverage should be x% where usually x = 80. But what is exact meaning? Is it line coverage or branch coverage or something else? Typicaly developers are using line coverage as most of software supports it however much more meaningful is branch coverage. Let’s take …
Software developer daily work and values
What is the most important in daily work of software engineer? Resolving on time or with proper quality? Resolving client problem fast over good engineering? Obedience to the boss? What’s about own wellbeing? In my opinion the basic duty of software engineering and main purpose of my job is to solve the problems of customers. …
HTTP Verbs in API design
HTTP Verbs are basic methods in web world. They are evolving between HTTP protocol versions but also new RFCs are published. Also they were extensions like WebDAV (with 7 methods). A full registry is maintained by IANA (here) however most of people will reply with 9 basic verbs (interesting discussion about this on stackoverflow). Why …