Service Locator for Vaadin

public class ServiceLocator {

    static ApplicationContext ctx;

    public static  T getService(Class t){
        return ctx.getBean(t);
    }

    public Object getService(String beanName){
        return ctx.getBean(beanName);
    }

    public static void main(String[] args) {
        String name = getService(String.class);
    }

    public static void setCtx(ApplicationContext ctx) {
        ServiceLocator.ctx = ctx;
    }
}

If you like to hide the Application context setter, you can use reflection to set Application context.

public void setServiceLocator(ApplicationContext ctx) throws NoSuchFieldException, IllegalAccessException {
        Field modifiersField = ServiceLocator.class.getDeclaredField("ctx");
        modifiersField.setAccessible(true);
        modifiersField.set(null, ctx);
    }