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Production-ready Spring Boot, crafted carefully.

I'm Wim Deblauwe, a software developer specialized in Java and Spring. I write books, maintain open-source projects like error-handling-spring-boot-starter, and publish practical, battle-tested articles here.

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New book

Crafting Spring Boot Starters

Design, build, test, and publish auto-configuration libraries on Spring Boot. Learn the ins and outs of developing production ready Spring Boot starters.

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Taming Thymeleaf

Server-side rendering with Spring Boot, step by step.

Modern frontends with htmx

Hypermedia-driven UIs with Spring Boot & Thymeleaf.

Recent posts

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Oct 5, 2010 Using AspectJ and Annotations to document framework pollution in the domain model aspectj This blog post will show you how to use Aspectj and Annotations in Java to avoid that certain framework artifacts 'pollute' your code and people start calling methods that you really don’t want when you thought out your design. A concrete example for this if you want to create immutable objects. Value Objects in Domain Driven Design should be like this. You create a constructor for all your object needs, mark all fields final and add some public getters. But now you want to send this object to a Flex client using BlazeDS. You need a default constructor and getters for all properties. Your immutable object, just became highly mutable, just because the framework you use needs this. Same can be said for Hibernate or Coherence that need a default constructor.

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