Guice module integration issue with REST

Guice module integration issue with REST I have define one AOP guice based module, but when I tried to integrate with REST code, methodInvocation.proceed retun null. What might be best way to solve this issue.

Define AOP Guice based module as below

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@interface NotOnWeekends {}
public class WeekendBlocker implements MethodInterceptor {

public Object invoke(MethodInvocation invocation) throws Throwable {

Calendar today = new GregorianCalendar();

if (today.getDisplayName(DAY_OF_WEEK, LONG, ENGLISH).startsWith("S")) {

throw new IllegalStateException(

invocation.getMethod().getName() + " not allowed on weekends!");
}

return invocation.proceed();

}

}

public class NotOnWeekendsModule extends AbstractModule {
protected void configure() {

bindInterceptor(Matchers.any(), Matchers.annotatedWith(NotOnWeekends.class),

new WeekendBlocker());
}
}

But I tried to Integrate this with my REST API

public class WorkerBean implements Worker {

@Autowired
private WorkerRepository workerRepository;

@Override
@NotOnWeekends
public Collection findAll() {

Collection workers = workerRepository.findAll();

return workers;
}

@RestController
public class WorkerController {

@RequestMapping(
value = "/api/workers",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity> getWorkers() {

Worker worker = Guice.createInjector(new NotOnWeekendsModule()).getInstance(Worker.class);

Collection worker = worker.findAll(); // return null

....
}