ByThorben JanssenEvery framework has a set of exceptions that indicate common error scenarios. Understanding them will help you turn a task that could drag along for days into a quickly-implemented feature. When working with Hibernate, they tell you about issues with your database queries, mapping mistakes, and problems during write operations. In this article, I want…
ByThorben JanssenUsing JPA’s and Hibernate’s 2nd level cache can improve the performance of your persistence layer. It acts as a session-independent entity store. Hibernate uses it whenever you call the find method on your EntityManager or traverse an association to fetch a cached entity. Instead of executing a database query, Hibernate gets the entity object from…
ByThorben JanssenLombok is a popular framework among Java developers because it generates repetitive boilerplate code like getter and setter methods, equals and hashCode methods, and the default constructor. All you need to do is add a few annotations to your class and Lombok will add the required code at compile time. This works reasonably well for…
ByThorben JanssenJPA and Hibernate require you to write lots of Strings. You use them to create ad-hoc and named queries with JPQL, to define native SQL queries and to specify the fetching behavior in an EntityGraph. Until Java 13, the lack of multiline Strings in Java made all of these tasks either annoying to implement or…
ByThorben JanssenA 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…