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…
ByThorben JanssenDisclaimer: This post is sponsored by Cockroach Labs. CockroachDB is an open-source relational database designed to be highly scalable and reliable in distributed environments. It’s available on AWS and Google Cloud or as an on-premise installation. This makes it an interesting candidate for microservice-based applications. If you want to give it a try or if…
ByThorben JanssenThe size of a result set has a huge impact on the performance of a query, the burden it puts on your Java application, and the user experience your UI provides. It’s a general best practice to split huge result sets into multiple parts presented on separate pages. This process is called pagination. The most…
ByThorben JanssenThe entity lifecycle model is one of the core concepts of JPA and all its implementations. Even though it’s not directly visible when working with JPA’s EntityManager, it affects all operations you perform. The different states of the model define how your persistence provider, e.g. Hibernate, handles your entity objects. This includes if it loads…
ByThorben JanssenChoosing the right projection when selecting data with JPA and Hibernate is incredibly important. When I’m working with a coaching client to improve the performance of their application, we always work on slow queries. At least 80% of them can be tremendously improved by either adjusting the projection or by using the correct FetchType. Unfortunately,…