Marcos Fernández

Chief Software Architect at Ávoris @avoristravel. Trying to be always be a better a software crafter. Proud father of two kids.

[Siva @sivalabs]

Hexagonal Architecture might be proposed to solve the problems back in the days. But that is completely unnecessary and I would even say overkill for most of the applications.

All the driver side, driven side, port, adapter, etc is just more buzzwords describing decoupling the implementation using programming-to-interfaces technique. Nothing more, nothing less.

I took one of the Hexagonal Architecture implementation of a Spring Boot app

https://t.co/6pFzgCtbVO

Created the same application using simple layered architecture (layered-app module) and yet achieve the goals:

* Separation of the concerns ✅
* Testability ✅
* Less code, more readable & to the point 🎯
* No unnecessary interfaces with only one implementation 🚫
* No InMemory implementations just for satisfying imaginary testing/local_dev requirements. Use Testcontainers to test with what actual DB you use in production. 🚫
* Made the Service layer as transactional boundary as it should be. ☑️

Stop cargo-cult programming.

[Marcos Fernández @marcosdev]

Deploying a high load application to production with @java 25 it's a nice way to start the day. #StartMigrationToJava25 #Java25 #Java

[Ismael Juma @ijuma]

OpenJDK PR with significant improvements to sorting implementation:

"* introduced Radix in parallel sorting which shows several times performance boost and has linear complexity instead of n*ln(n)
* improved mixed insertion sort
* improved merging sort for almost sorted data..."

[Marcos Fernández @marcosdev]

@Stephan007 Here we go!!!! For the third year we will come back to #Devoxx Belgium. 🥳🎉

[Roman Elizarov @relizarov]

No one wants to program in a dynamically typed language. No one says, "I want this string variable to hold a string an integer now". Hold your defense of Python and JS — read on. I'll explain why dynamically typed languages exist, what they're good for, and why they're still here

[Victor Rentea @VictorRentea]

Top REST API Design Pitfalls - presentation slides for my talk today
https://t.co/2sI4P7eOX6

[Marcos Fernández @marcosdev]

Thanks @speakjava for the photo. Such an incredible opportunity to meet in person people you learned a lot from.

[Marcos Fernández @marcosdev]

Thanks @venkat_s for the photo. With @vincesel

[Marcos Fernández @marcosdev]

Let’s start the day in the best way possible at #Devoxx with a super interesting session with @venkat_s. Design patterns revisited in modern Java

[Marcos Fernández @marcosdev]

Here we go again. One year later I’m here again, but this time with my friend @vincese . #Devoxx

[Java @java]

Java 23 is now available! #Java23 #JDK23 #OpenJDK

Download Now: https://t.co/JIB36qx4Tc
Release notes: https://t.co/oocLYX51n5
API Javadoc: https://t.co/NDHWlhXfNi
Features: https://t.co/W3FoI7EMLa
Blog: https://t.co/gCkxujzmIN

[Marcos Fernández @marcosdev]

@Stephan007 I’ve got it, I will repeat for second year!!!! #Devoxx 🥳

[Marcos Fernández @marcosdev]

@S_Dietrich Not typically, but I’ve found a lot of them where this “bug” is done in a very hot path.

[Marcos Fernández @marcosdev]

People doesn’t think too much about the cost of creating instances of java.time.format.DateTimeFormatter, and the worst thing is that is a thread safe class. 🤦🏻‍♂️

[Marcos Fernández @marcosdev]

@Sc_Meerkat @simas_ch In an enterprise environment, it’s quite normal to have a parent pom where a set of dependencies, properties or plugins and configured. It’s the same scenario, you need to know it to don’t create a mess.

[Marcos Fernández @marcosdev]

If you are working in a Spring Boot application, please, when you add a new dependency, think if it’s necessary to set dependency’s version or it’s already managed by Spring Boot.

[Marcos Fernández @marcosdev]

@Sc_Meerkat @simas_ch It’s not about frameworks, it’s about knowing that you have a dependencies managed by dependency management. You need to know which ones are managed and which not.

[Stanislav Kozlovski @kozlovski]

https://t.co/HagVZKisb4

[Marcos Fernández @marcosdev]

@joan_miralles @rodrigocortes @EspacioFTef @randomhouse_es @penguinlibros