ByThorben JanssenThe Date and Time API, introduced in Java 8, finally replaced the old java.util.Date. It’s much easier to use and finally offers separate classes representing date, date with time, and only time information. That not only improves your business code but also makes it easier to use them as entity attributes. At least if you’re…
ByThorben JanssenChoosing the right FetchType is one of the most important decisions when defining your entity mapping. It specifies when your JPA implementation, e.g., Hibernate, fetches associated entities from the database. You can choose between EAGER and LAZY loading. The first one fetches an association immediately, and the other only when you use it. I explain…
ByThorben JanssenChoosing the right logging configuration can make the difference between finding a performance issue during development or suffering from it on production. But it can also create an overhead that slows down your application. You need to decide which information you need and configure your system accordingly. I, therefore, prefer to use two different configurations:…
ByThorben JanssenI recently got a lot of questions about JPA 3.0, and since EclipseLink and Hibernate now offer full support for it, it’s time to take a closer look at the latest update of the specification. As part of the transformation from Java EE to Jakarta EE, the Java Persistence API (JPA) was renamed to Jakarta…
ByThorben JanssenTo connect your persistence layer to your database, you need to configure a data source or provide the JDBC connection driver, URL, and login information to Hibernate directly. In addition to that, Hibernate needs to know the database-specific dialect it shall use to generate the SQL statements. Hibernate can detect the dialect based on the…