How to impl bean-side of proxy w/Future return?

[Jason Dillon]

When using proxies and beans to hide all Camel details from the 
application-layer, how does one implement the bean-side of the Future returning 
request?

public interface SimpleService
{
    Future<String> test();
}

public class SimpleServiceImpl
    implements SimpleService
{
    public Future<String> test() {
        return ???
    }
}

Is it even possible to have a bean backing up a proxy invocation that returns a 
Future?

--jason