Question

I have a service bean (annotated with @Service) which implements the ApplicationListener inteface for T type of event objects that extend the ApplicationEvent abstract Class. There is a pretty simple and clear example of this in the Spring docs here

However when i attempt to inject this bean into other ones using @Autowired i get is:

org.springframework.beans.factory.NoSuchBeanDefinitionException: No
matching bean of type […] found for dependency: expected at least 1
bean which qualifies as autowire candidate for this dependency.
Dependency annotation
{@org.springframework.beans.factory.annotation.Autowired(required=true)}

If i try to use something like @Resource then i get a class cast exception (attempting to inject a resource of one type but getting a Proxy).

Answer 1

If i try to use something like @Resource then i get a class cast
exception (attempting to inject a resource of one type but getting a
Proxy).

This sounds like you are trying to reference it by class, whereas it is wired as an interface-based JDK proxy.

If you have this class:

@Service
public class FooServiceImpl implements FooService{}

wire it as:

@Autowired
private FooService fooService;

not as:

@Autowired
private FooServiceImpl fooService;

Reference:

• AOP Proxying Mechanisms