Singleton and @Autowired returning NULL

Question

I have a repository manager that manages my repositories. I have the @Autowired to instantiate my properties, but they are always null. The beans are correctly configured

Answer 1

I just ran into this myself. The problem is that when you do

new RepositoryManager();

in Instance(), you are not using Spring to create RepositoryManager, and thus the dependency injection isn't happening for your instance (no autowiring).

The solution is to do away with the Instance() singleton pattern. If you want to insist on a Singleton, then do this

@Component
@Scope(value = "singleton")
public class RepositoryManager {
    ...
}

Then wherever you need the repository manager, just autowire in a reference to it (assuming the calling bean is also managed by Spring!)

@Autowired
private RepositoryManager repositoryManager = null;