@Aspect
public class MyAspect {
    @Pointcut("execution(* test.Main.*(..))")
    public void webServiceMethod() { }

    @Pointcut("@annotation(test.Loggable)")
    public void loggableMethod() { }

    @Around("webServiceMethod()")
    public Object logWebServiceCall(ProceedingJoinPoint thisJoinPoint) throws Throwable {
        String methodName = thisJoinPoint.getSignature().getName();
        Object[] methodArgs = thisJoinPoint.getArgs();

        System.out.println("Call method " + methodName + " with args " + methodArgs);

        Object result = thisJoinPoint.proceed();

        System.out.println("Method " + methodName + " returns " + result);

        return result;
    }
}

public class GreetingServiceImpl implements GreetingService {
    private String greeting;

    public GreetingServiceImpl() {
    }

    public GreetingServiceImpl(String greeting) {
        this.greeting = greeting;
    }

    @Loggable
    public void sayGreeting() {
        System.out.println(greeting);
    }

    public void setGreeting(String greeting) {
        this.greeting = greeting;
    }
}