Spring Load-Time Weaving
Introduction In this article, we are going to see how Spring load-time weaving works so that you can apply the Hibernate bytecode enhancement mechanism at runtime. Traditionally, the bytecode enhancement mechanism is applied when the project is built using a Maven or Gradle plugin. For more details about the build-time approach, check out this article.
Table partitioning with Spring and Hibernate
Introduction In this article, we are going to see how we can implement a table partitioning solution when using Spring and Hibernate. The goal of table partitioning is to split a large table into multiple smaller partition tables so that the associated table and index records can fit into the in-memory Buffer Pool, therefore allowing a more efficient seek or scan.
The best way to use Spring Data JPA Stream methods
Introduction In this article, we are going to see what is the best way to use Spring Data JPA Stream query methods. When having to fetch a larger result set, the advantage of using a Java Stream is that the query result set could be fetched progressively instead of getting all the data at once.
How to fetch multiple JPA collections with Blaze Persistence MULTISET
Introduction In this article, we are going to see how we can fetch multiple JPA entity collections without generating an implicit Cartesian Product with the MULTISET strategy offered by the Blaze Persistence open-source project. The MULTISET fetch strategy is inspired by the MULTISET operator offered by jOOQ. If you are not familiar with the MULTISET operator, then check out this article first, in which I explain why this jOOQ feature is truly revolutionary.
Spring Data Query By Example
Introduction In this article, we are going to see how the Spring Data JPA Query By Example (QBE) feature works, when you should use it, and what limitations it has. While Spring Data JPA already provides a wide range of options to query data: query methods or the @Query annotation Spring Data JPA Specification custom Repository query methods The Spring Data Query By Example feature is meant to offer a way to decouple the data filtering logic from the query processing engine so that you can allow the data access layer clients… Read More
The best way to validate the DDL schema with Spring and Hibernate
Introduction In this article, we are going to see what is the best way to validate the DDL schema and the JPA entity mappings when using Spring and Hibernate. I decided to write this article after reading this Tweet:
Spring Transaction and Connection Management
Introduction In this article, we are going to see how Spring handles transaction and database connection management. I decided to write this article because this topic has been requested recurringly by the students taking my High-Performance Java Persistence training.
The best way to use the Spring Data JPA Specification
Introduction In this article, we are going to see what is the best way to use the Spring Data JPA Specification when combining multiple predicates with the result set ordering logic. While you can also use query methods or the @Query annotation to define your Spring Data queries, the Spring Data JPA Specification allows you to compose dynamically various filtering criteria, which may be very convenient when you’d, otherwise, end up with lots of query method permutations.
The best way to use JOIN FETCH and Pagination with Spring
Introduction In this article, we are going to see how we can use the JOIN FETCH clause when fetching a child collection eagerly while also limiting the number of parent records using pagination in a Spring Data JPA application. I decided to write this article because the most common solution used in many projects turns out to be extremely inefficient.
The best way to use Spring Data query methods
Introduction In this article, we are going to see how Spring Data query methods are built, when you should use them, and especially when you should avoid them. I decided to write this article after answering this StackOverflow question, which depicts an 87-character-long Spring Data query method. TL;DR, Don’t write query methods that cannot even fit on the screen.
