Two weeks ago, I wrote how you could write a Spring application with no annotations. Many alternatives are available to configure your Spring app. I’d like to list them in this post, leaving Spring Boot out of the picture on purpose.

Core concepts

A couple of concepts are central in Spring. The related documentation doesn’t describe most of them. Here is my understanding of them:

  • Bean: A bean is an object managed by the Spring IoC container
  • Bean Factory: A bean factory is a component that manages the lifecycle of beans, especially regarding the instantiation of new objects
  • Bean Definition: A bean…

In my latest blog post, I advised reassessing one’s opinion now and then as the IT world changes fast. What was true a couple of years ago could be dead wrong nowadays, and you probably don’t want to base your decisions on outdated data. This week, I’d like to follow my advice.

One of my first posts was advocating for TestNG vs. JUnit. In the post, I mentioned several features that JUnit lacked:

  • No parameterization
  • No grouping
  • No test method ordering

Since JUnit 5 has been out for some time already, let’s check if it fixed those issues.

Parameterization

I wrote…


Some, if not most, of our judgments regarding technology stacks come either from third-party opinions or previous experiences. Yet, we seem to be adamant about them. For a long time (and sometimes even now), I’ve seen posts that detailed how Spring is bad because it uses XML for its configuration. Unfortunately, they blissfully ignore the fact that annotation-based configuration has been available for ages. Probably because of the same reason I recently read that Spring is bad… because of annotations. If you belong to this crowd, I’ve news for you: you can get rid of most annotations, and even more…


There’s still an ongoing debate whether development in particular and IT, in general, are engineering practices. In all cases, there’s no denying that our industry is based on scientific foundations.

Most of the organizations I’ve worked for implement the Deming wheel in one form or another:


On March 14th, 2020, I landed home. I had planned the week before to be productive: one talk in Pasadena, two talks in San Francisco, one in Bucharest, and one in Istanbul. Then, on the 16th, I was supposed to fly again to other events.

Then, Covid happened. Governments started to close borders; in turn, organizers began to cancel events. I managed to do the talk in Pasadena with about ten people in the room. The organizer of one of the San Francisco talks managed to move my talk online. The respective conference organizers canceled the other events.

The pandemics…


For once, I’m wondering a bit if this post can be helpful to somebody else. I believe my context is pretty specific. Anyway, just in case it might be the case, here it is.

My Jet Train project makes use of GTFS. GTFS stands for General Transit Feed Specification. It models public transportation schedules and their associated geographic information.

GTFS is based on two kinds of data, static data, and dynamic data. Static data may change but do so rarely, e.g., transit agencies and bus stations. They are available as static files that you need to download now and then…


I’ll be honest: I initially wanted to describe all collections available in Rust as well as their related concepts. Then, I started to dig a bit into it, and I decided it would have been (much) too long. For that reason, I’ll restrict the scope to the Vec type.

Here’s the diagram we will dive into:


This week, I want to take a break from my Start Rust series and focus on a different subject. I’ve already written about my blogging stack in detail.

However, I didn’t touch into one facet, and that facet is how I generate the static pages from Jekyll. As I describe in the blog post, I’ve included quite a couple of customizations. Some of them require external dependencies, such as:

  • A JRE for PlantUML diagrams generation
  • The graphviz package for the same reason
  • etc.

All in all, it means that I require a fully configured system. I solved this problem by…


For me, the best learning process is regularly switching between learning and doing, theory and practice. The last post was research; hence, this one will be coding.

I’ve been a player of Role-Playing Games since I’m 11. Of course, I’ve played Dungeons & Dragons (mainly the so-called Advanced Edition), but after a few years, I’ve taken upon Champions…


So far, we have learned the basics of Rust syntax, developed a custom Kubernetes controller, and integrated with the front-end with Wasm.

This is the 7th post in the Start Rust focus series. Other posts include:

I’ve been using the JVM for two decades now, mainly in Java. The JVM is a fantastic piece of technology. IMHO, its most significant benefit is its…

Nicolas Fränkel

Dev Advocate @Hazelcast . Former developer and architect. Still teaching, learning and blogging.

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