spring-projects / spring-projects/spring-framework
Add support for @Nonbinding in @jakarta.inject.Qualifier annotations
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Description
Affects: 5.3.2
In our project we reuse Java annotations across Framework boundaries (Spring/CDI/Micronaut). It turns our that Spring does not fully support the semantics of javax.inject.Qualifier annotations. Specifically, Spring Framework should support the marking of annotation fields with the @Nonbinding annotation. This would be especially useful when using @Bean methods together with org.springframework.beans.factory.InjectionPoint.
I have created a demo application to show the current behavior and desired behavior:
https://github.com/ghillert/spring-injectionpoint-demo
Please see especially:
It looks like @jhoeller aknowledged the issue in 2016:
https://gist.github.com/moelholm/4317e93f18b02e9582afefc152debb44
For reference:
Java EE JavaDoc - Annotation Type Nonbinding
https://javaee.github.io/javaee-spec/javadocs/javax/enterprise/util/Nonbinding.html
Advanced Using @Nonbinding to combine a configuration annotation and a qualifier annotation into one annotation
https://dzone.com/articles/cdi-di-p2
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the linked demo's src/main/java/com/hillert/injectionpoint/config/AppConfig.java and compare its behavior with the Jakarta EE Nonbinding documentation. Trace how Spring handles qualifier annotation fields when resolving InjectionPoint-based beans. Done means the demo's desired behavior works for qualifier fields marked with @Nonbinding, with appropriate framework coverage added.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, spring
- Domain
- backend, backend-api-design
- Issue type
- Feature
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 35/100