Spring MDC Transaction Logging
Introduction In this article, we are going to see how to configure a Spring application to use MDC (Mapped Diagnostic Context) for transaction logging. This technique is going to help us inject the Persistence Context information as well as the associated database transaction identifier in all the log entries emitted from within a @Transactional service method.
Spring Data Hibernate Entity Listeners
Introduction In this article, we are going to see how we can configure Spring Data to register several Hibernate Entity Listeners that can intercept entity state modifications. As I explained in this article, JPA also offers an event listening mechanism that you can configure via the @EntityListeners, @PostPersist or @PostUpdate, or PostRemove annotations. However, the JPA solution is way too limited as it doesn’t allow you to interfere with the EntityManager directly. Therefore, I prefer using the Hibernate Entity Listeners mechanism, which you can easily integrate with Spring Data, as this article… Read More
The best way to do the Spring 6 migration
Introduction In this article, we are going to see how you can get the most out of the Spring 6 and Hibernate 6 migration. The tips in this article are based on the work I’ve done to add support for Spring 6 in Hypersistence Optimizer and the High-Performance Java Persistence project.
The Spring Data JPA findById Anti-Pattern
Introduction In this article, we are going to see how the Spring Data JPA findById method can become an Anti-Pattern when using it to reference parent entity associations.
Spring Data JPA entity locking
Introduction In this article, we are going to see what options Spring Data JPA offers for entity locking. We will see how we can apply a shared or exclusive row-level lock upon fetching one or multiple entities.
How to write a custom Spring Data Base Repository
Introduction In this article, we are going to see how we can write a custom Spring Data base Repository that you could use instead of the default ones, like the overly common JpaRepository. Now, why would you even want to do that? Well, most of the default repositories extend the CrudRepository, which provides some very questionable defaults, like findAll or deleteAll that shouldn’t be really inherited by every single data access Repository instance.
The Spring Data findAll Anti-Pattern
Introduction In this article, we are going to see why inheriting the default Spring Data findAll method in every data access Repository is a terrible Anti-Pattern.
The best way to fetch a Spring Data JPA DTO Projection
Introduction In this article, I’m going to show you what is the best way to fetch a Spring Data JPA DTO Projection. Apart from the basic use cases, we’re going to see how to fetch even hierarchical DTO structures using Spring Data JPA.
Spring Data JPA MultipleBagFetchException
Introduction In this article, I’m going to show you how to handle the MultipleBagFetchException thrown by Hibernate upon simultaneously fetching multiple collections with Spring Data JPA.
Spring Transaction Best Practices
Introduction In this article, I’m going to show you various Spring Transaction Best Practices that can help you achieve the data integrity guarantees required by the underlying business requirements. Data integrity is of paramount importance because, in the absence of proper transaction handling, your application could be vulnerable to race conditions that could have terrible consequences for the underlying business.
