Talk on Java features up to 14

Recently, I’ve prepared a talk on up to date Java features with very practical examples.

The whole presentation is centered around a Java 8 application, which I migrate live to Java 14, while talking about the coolest features, why use them and more importantly when to do so.

Spring Boot project using Java 9 modules – part 2 – adding Spring Data JPA

Objective

This is the second installment in the series, and it builds on top of the previously developed code.

In part 1 I set up a Spring Web application with an endpoint returning a hard coded value. Part 1 can be found here.

In this part I added integration to a database (HSQL, in memory) and I’ve used a JpaRepository to add and view rows from the database

API Versioning

About a year ago, I’ve written an article about evolving APIs. It describes some common situations, and also contains some tips on how to handle them, while minimizing the risk to your project.

Key recommendations:

• improve the design of your API. In addition to identifying the business domain for a microservice, have a look at its dependencies as well. Reducing the number of possible interactions allows one to keep control even with increased complexity. It may also decrease the number of scenarios which need testing;

API First vs. Code first

Prin intermediul asociatei AgileHub din Brasov, am avut recent un meetup on-line cu tema ‘API First vs. Code First’.

Prezentarea a fost urmata de o sesiune de live coding.

Inregistrarea completa o puteti vedea aici: https://www.youtube.com/watch?v=8RE7uuQir1c

Codul complet poate fi gasit aici:

• https://github.com/vladcd/openapi.server – server generat pe baza unui fisier in format OpenAPI 3.0
• https://github.com/vladcd/openapi.client – client generat pe baza aceluiasi fisier

Spring Boot project using Java 9 modules – part 1

Objective

I aim to build a sample multi-module maven project with Spring Boot. Each maven module will also be a names Java module.

The project will expose a simple REST API. The endpoints will be secured using Spring Security with OAuth. The back-end will connect to a relational database (configuration will be provided for PostgreSQL).

It will follow a layered architecture, with the service layer having transactional operations, implemented using Spring’s @Transactional annotation.

Leftover winter(ish) salad

The secret to a good leftover salad is to have delicious leftovers.

For the one in this post we used mostly seasonal vegetables, with two notable exceptions: baby spinach and cherry tomatoes.

Half-eaten almond milk porridge

So I normally don’t get overly excited about porridge, but this one was different.

The recipe is simple:

Zucchini cream soup

This soup is so delicious it took me by surprise.

The original recipe is here: https://www.bbcgoodfood.com/recipes/1577642/courgette-potato-and-cheddar-soup

We had some Graviera cheese instead of cheddar, but the taste is probably very similar.

Birthday cake

Disclaimer: my wife baked it

Original recipe here: https://anneauchocolat.dk/en/cakes/saftig-brombaer-mandelkage-med-maelkechokolade-ganache/

It looks fantastic and I bet it tastes the same. It’s easy to decorate because you can basically use anything (like most cakes anyway).

Orange ice cubes

This is a fantastic way to spend 5 minutes with your kid: get a tray for ice cubes, add a piece of fruit in each one (we’ve had red currants), then fill them with freshly squeezed orange juice.

Put them in the freezer and enjoy later either.

We’ve used them to quickly cool down tea, while also adding extra flavor.