A lot of developers complain that Java is too verbose. And I can understand that, especially for all classes that are supposed to be a basic data structure, like JPA/Hibernate entities or DTOs. So, it was no surprise that I got a lot of questions about JDK’s records feature and how you can use it…
For the last 2 years, I have shared a list of the Java-related YouTube channels that I find the most enjoyable or useful. And based on the popularity of these articles, it seems like I’m not the only one who enjoys watching good lectures and conference talks on YouTube. That’s especially the case in the…
As you might have recognized, thoughts-on-java.org is now thorben-janssen.com. But don’t worry, it’s only a different domain name and nothing really changed. Thoughts-on-java.org gets redirected to thorben-janssen.com, all articles and courses are still there and you can keep all of your bookmarks. I also implemented a small redesign. Well, internally and especially technically, it was a…
You probably learned that you should use FetchType.LAZY for all of your associations. It ensures that Hibernate initializes an association when you use it and doesn’t spend any time getting data you don’t need. Unfortunately, this introduces a new issue. You now need to use a JOIN FETCH clause or an EntityGraph to fetch the…
EntityGraphs and JOIN FETCH clauses provide an easy and efficient way to fetch an entity and initialize its associations. But if you try to use it with a domain model that uses inheritance, you will quickly run into an issue: You can’t use this approach in a polymorphic query to fetch an association that’s defined…