Thirteen years later! Thirteen years ago today, I created this blog on WordPress.com because I wanted to share some best practices I discovered while developing various web and enterprise applications with both Java and .NET. Prior to LLMs and AI tools, developers relied on Google and StackOverflow to find answer to their problems, and both blogging and answering StackOverflow questions were a very way to build your personal brand. Nowadays, fewer and fewer developers get to read blog posts, yet it’s still useful to share your findings, even if your audience will... Read More The post…
Introduction On the 24th of September, I participated in the 9th edition of DevTalks Cluj-Napoca, and since I had a really great time attending this conference, I decided to share what I learned from attending sessions and having conversations with both speakers and participants. DevTalks DevTalks runs several conferences throughout Romania, and while the one in Bucharest is very large, featuring 14 stanges, we are lucky to have on in Cluj-Napoca, my home town, which manages to run 3 parallel tracks on which 40 speakers present their latest findings. This year, the... Read More The post What…
JavaZone 2026 At the beginning of September, I participated in JavaZone for the third time and had the privilege of meeting a lot of passionate software developers willing to share their knowledge with the community. In the first conference day, I attended a very good talk about JPA performance tuning that was delivered by Jos Roseboom and since I enjoyed his talk, I proposed him to gave an interview for this blog. Therefore, in this article we have the pleasure of getting to know Jos and take opportunity of learning about Spring... Read More The post Meet Jos Roseboom appeared first on Vlad…
Introduction In this article, I’m going to show you how to emulate a LEFT JOIN FETCH between two root entities without fetching the intermediate child entity. I got the inspiration for this article by this comment thread on my blog. Domain Model Let’s assume we have the following entities: The Post is the root entity of our hierarchy, but just like it’s the case with the relational model, the root entity does not have any reference to its children: On the second level of our hierarchy we have the PostDetails: The PostDetails... Read More The post How to emulate LEFT JOIN FETCH using…
Introduction In this article, I’m going to show you the best way to replace the deprecated @GenericGenerator when upgrading your application to Hibernate 7. Hibernate @GenericGenerator annotation The @GenericGenerator annotation has been available since Hibernate 3.5, as an alternative to the XML element from HBM mappings. As illustrated by the Hibernate 6.5 @GenericGenerator Javadoc, this annotation was deprecated in favor of the @IdGeneratorType meta-annotation, which we’ve been using before for the TSID identifier. Traditionally, there were two main use cases where you’d use the…
Introduction My friend, Denis Magda, wrote a wonderful book called Just Use Postgres!, and I’m glad that I got the chance to read it. Audience This book is useful for any software developer who’s either using PostgreSQL or plans on using it because it covers a lot of features that are very useful for modern applications. No matter your level of seniority, you are definitely going to learn from Denis’ book. Content Just Use Postgres! has 402 pages, 3 parts, and 11 chapters. The first part is an introduction to PostgreSQL and... Read More The post Book Review – Just Use Postgres! appeared first…
Introduction In this article, I’m going to show you the best way to clean up test data when using Spring and Hibernate. While it’s very common to use the @DataJpaTest annotation when implementing integration tests, in this blog post, you will see why you are better off avoiding using this annotation. Why I don’t use @DataJpaTest As explained by the manual, Spring Boot provides the @DataJpaTest annotation for Spring Data JPA integration testing. Once the @DataJpaTest annotation is added to an integration test, Spring Boot will make the following changes to the... Read More The post The best…
Introduction My friend, Laurentiu Spilca, has been working on the second edition of his Troubleshooting Java book, and when I was asked to review it, I was more than happy to do it since the book features a lot of topics that I’m also very interested in, such as performance tuning and query optimization. Audience This book is useful for any Java developer because it teaches you how to get the best out of your IDE debugger, as well as showing you how to profile Java applications and fix very complex issues,... Read More The post Book Review – Troubleshooting Java appeared first on Vlad…
Twelve years later! Twelve years ago today, I decided to create this blog on WordPress.com to share whatever I was finding interesting while working as a software architect. Prior to starting this blog, I didn’t have any writing experience, which you can clearly see in the first article I’ve ever published. However, practice makes perfect, and in time, I managed to learn how to express myself in writing, whether it was an article, a social media post, an answer on StackOverflow, or a book. Follow Your Bliss I’ve always loved to read.... Read More The post Twelve years of blogging appeared…
Introduction In this article, I’m going to show you how to optimize the queries executed by a Spring application running on MySQL using Releem. For a short introduction about Releem, check out this previous article, in which I explained how to set up Releem to collect metrics from your MySQL database. Spring Petclinic application The application under test is going to be the well-known Spring Petclinic that we are going to run using the MySQL profile: After starting the application, we are going to run the petclinic_test_plan.jmx JMeter test plan that is... Read More The post MySQL Query…
Introduction In this article, I’m going to review the Foundations of AI and Machine Learning for Java Developers video course from my fellow Java Champion, Frank Greco. If you are new to AI and ML and want to get a great introduction to these topics, then you should definitely join watch the video lessons created by Frank Greco. And, thanks to LinkedIn Learning’s generosity, until June 20, you can enroll in this video course for free. Video Course Agenda The course provides one hour and thirty-five minutes of video lessons that are... Read More The post Foundations of AI and Machine Learning…
Introduction In this article, I’m going to explain how to map the Oracle TIMESTAMP WITH TIME ZONE with JPA and Hibernate. While the DATE and TIMESTAMP column types are suitable for mapping the LocalDateTime, the TIMESTAMP WITH TIME ZONE column type allows us to map both the ZonedDateTime and OffsetDateTime. Oracle TIMESTAMP WITH TIME ZONE Traditionally, Oracle provided the DATE and TIMESTAMP column types to store timestamp values. The difference between the DATE and TIMESTAMP types is that the TIMESTAMP column type allows us to store fractional seconds while the DATE type... Read More The…
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