junit - How can I get a list of instantiated beans from Spring?

Question

I have several beans in my Spring context that have state, so I'd like to reset that state before/after unit tests.

My idea was to add a method to a helper class which just goes through all beans in the Spring context, checks for methods that are annotated with @Before or @After and invoke them.

How do I get a list of instantiated beans from the ApplicationContext?

Note: Solutions which simply iterate over all defined beans are useless because I have many lazy beans and some of them must not be instantiated because that would fail for some tests (i.e. I have a beans that need a java.sql.DataSource but the tests work because they don't need that bean).

Answer 1

For example:

 public static List<Object> getInstantiatedSigletons(ApplicationContext ctx) {
            List<Object> singletons = new ArrayList<Object>();

            String[] all = ctx.getBeanDefinitionNames();

            ConfigurableListableBeanFactory clbf = ((AbstractApplicationContext) ctx).getBeanFactory();
            for (String name : all) {
                Object s = clbf.getSingleton(name);
                if (s != null)
                    singletons.add(s);
            }

            return singletons;

    }