@heyjude321

```java
@Component
public class DemoServiceImpl implements DemoService, ApplicationContextAware {

public static DemoService self;

@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
DemoServiceImpl.self = applicationContext.getBean(DemoService.class);
}

@Override
public String echo(String message) {
return message;
}
}
```