When using Spring Data JPA, you are used to derived and custom queries that return the result in your preferred format. A typical example is a DTO projection, which is the most efficient one for read-only operations. To use it in a derived or custom JPQL query, you only need to change the return type…
Panache is a Quarkus-specific library that simplifies the development of your Hibernate-based persistence layer. Similar to Spring Data JPA, Panache handles most of the repetitive boilerplate code for you. Its implementations of the repository and the active record pattern provide methods to create, update, and remove records, perform basic queries, and define and execute your…
With the T getReference(Class<T> entityClass, Object primaryKey) and the T find(Class<T> entityClass, Object primaryKey) method, JPA’s EntityManager seems to provide 2 methods that do the same. Both of them seem to get an entity by its primary key from the database. There obviously is a difference between the 2 methods. An established and well-defined API…
The Quarkus project enables you to develop Kubernetes-native applications based on Java and a huge list of well-established, Java-based frameworks. Hibernate is, of course, one of these frameworks. But the project not only enables you to build native applications with incredibly fast boot times and a very small memory footprint. It also provides a bunch…
By default, Hibernate loads all entity objects in read-write mode. It performs dirty checks to detect changes it needs to persist in your database for each of them. That makes entities very easy to use, but it also creates an overhead if you don’t want to change anything. You can avoid this by setting Hibernate’s…
