Practical writing on Java, Spring, AI, and the craft of software engineering.
If you're building with Java and Spring (or trying to figure out where AI fits into your development workflow) you're in the right place. I write practical, beginner-friendly deep dives on Spring Boot, Spring AI, and software engineering fundamentals, collected here in chronological order.
Filtering by tag: Spring Data
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Type Safe Property Paths in Spring Boot 4.1
Spring Boot 4.1 adds type-safe property paths to Spring Data, replacing stringly typed references in sorting, criteria queries, and composite paths.
Lazy JDBC Connections in Spring Boot 4.1: One Property, Massive Performance Win
Spring Boot 4.1 adds lazy JDBC connection fetching via spring.datasource.connection-fetch. See how it cuts connection hold time from 2 seconds to 15ms.
Spring Data AOT Repositories: Faster Startup and Build-Time Query Validation
Learn how Spring Data AOT Repositories move query processing from runtime to compile time, reducing startup times and memory usage, plus how to validate repository methods at build time.
Query By Example in Spring Data JPA: A Clean Approach to Dynamic Queries
Learn how to simplify your Spring Data JPA queries using Query By Example (QBE) and create dynamic, type-safe queries without the boilerplate code.
Spring Boot REST API Domain Class Converter
In this tutorial, you will learn about a class called the Domain Class Converter in Spring Data. This class will allow you to take arbitrary input like an id from a path variable in a REST API and automatically create a domain object by using Spring Data's CrudRepository.
Spring Data JPA Pagination: Pageable and PageRequest Tutorial
Learn how to add pagination to a Spring Boot REST API with Spring Data JPA using Pageable, PageRequest, and the PagingAndSortingRepository, with code examples.