spring-projects / spring-projects/spring-framework
Add support for refeshing a context for AOT processing with customized condition evaluation
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- Java
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Description
For Spring AOT to be more flexible, we'd like to record certain contributions without a locked-down BeanFactory. The most typical example is the handling of @Profile where we'd like to process them even though they may or may not be used at runtime.
The two immediate contenders here are: a (as much as possible) complete index for classpath scanning, and the build-time creation of CGLIB proxies.
Two things need to be improved to achieve this goals:
- The
Conditioncontract should be expanded with the notion of AOT processing where a condition can change its behavior based this new processing. Condition evaluation should offer a configurable option where this can be turned on - As additional bean definitions are filled in the
BeanFactorybean names clash are going to be frequent. We should find a way to name those beans so that they can be inspected.
Spring AOT has a strong requirements that the classpath can't be changed. As such, @ConditionalOnClass (or any classpath-based condition) should opt-out of this new mechanism and always provide the same outcome. This will make sure we won't get a BeanDefinition in the bean factory for something that would obviously break if we tried to investigate its type.
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 by examining the Condition contract and the BeanFactory behavior described in the issue. Determine how configurable AOT-aware condition evaluation and inspectable names for additional bean definitions should work, while preserving stable outcomes for classpath-based conditions. Done means the proposed AOT processing can handle these contributions without changing the classpath assumptions.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, spring
- Domain
- build-system, devtools
- Issue type
- Feature
- Difficulty
- 5/5
- Estimated time
- Over a week
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100