https://dplabs.tech/tags/dependency-injection/ Recent content in Dependency-Injection on dplabs — Software Engineering & Technology Consultancy Hugo en-us Mon, 21 Jul 2025 00:00:00 +0000 https://dplabs.tech/blog/spring-boot-dependency-injection/ Mon, 21 Jul 2025 00:00:00 +0000 https://dplabs.tech/blog/spring-boot-dependency-injection/ <p>Spring&rsquo;s dependency injection container is one of the most mature and capable DI frameworks available. It&rsquo;s also capable of enabling architectures that are deeply coupled to Spring internals, impossible to test without a full Spring context, and opaque about their dependencies.</p> <p>The patterns that produce good Spring Boot architectures are not complicated. They require deliberate choices about when to use Spring and when to step back from it.</p> <h2 id="constructor-injection-is-non-negotiable">Constructor Injection Is Non-Negotiable</h2> <p>Spring supports three injection mechanisms: constructor, setter, and field injection. Field injection (<code>@Autowired</code> on a field) is the most common and the worst.</p>