d1faa7187d
The changes in 899cf25 causes Repositories not finding any repository instances in case the lookup of beans by type for RepositoryFactoryInformation if the initialization causes as cyclic reference. Even worse, we might run into cases in which the attempt to access the beans by type causes transitive object creation which results in a successful lookup on a second attempt.
This is effectively caused by the catch-block in DefaultListableBeanFactory.getBeansOfType(…) which registers the suppressed exception as the method is used for lookup the beans for injection points with Lists and Maps.
We now explicitly look for bean names first and access the bean by name afterwards, which guarantees the exception to be thrown if it occurs. This will reveal the underlying issue and let user potentially deal with it. It's generally recommended to refer to Repositories in a very lazy fashion (using Provider<T>, ObjectFactory<T> or @Lazy on the injection point as of Spring 4) to avoid creating circular dependencies through by-type-lookups.
Spring Data Commons
Spring Data Commons is part of the umbrella Spring Data project that provides shared infrastructure across the Spring Data projects. Most importantly at the moment it contains technology neutral repository interfaces as well as a metadata model for persisting Java classes.
Features
- Powerful Repository and custom object-mapping abstractions
- Support for cross-store persistence
- Dynamic query generation from query method names
- Implementation domain base classes providing basic properties
- Support for transparent auditing (created, last changed)
- Possibility to integrate custom repository code
- Easy Spring integration with custom namespace
Getting Help
This README as well as the reference documentation are the best places to start learning about Spring Data Commons.
The main project website contains links to basic project information such as source code, JavaDocs, Issue tracking, etc.
For more detailed questions, use the forum. If you are new to Spring as well as to Spring Data, look for information about Spring projects.
Contributing to Spring Data Commons##
Here are some ways for you to get involved in the community:
- Get involved with the Spring community on the Spring Community Forums. Please help out on the forum by responding to questions and joining the debate.
- Create JIRA tickets for bugs and new features and comment and vote on the ones that you are interested in.
- Github is for social coding: if you want to write code, we encourage contributions through pull requests from forks of this repository. If you want to contribute code this way, please reference a JIRA ticket as well covering the specific issue you are addressing.
- Watch for upcoming articles on Spring by subscribing to springframework.org
Before we accept a non-trivial patch or pull request we will need you to sign the contributor's agreement. Signing the contributor's agreement does not grant anyone commit rights to the main repository, but it does mean that we can accept your contributions, and you will get an author credit if we do. Active contributors might be asked to join the core team, and given the ability to merge pull requests.