Initialize MongoDB Repositories using ApplicationContextAware in Spring Boot

@Component
public class ApplicationContextProvider implements ApplicationContextAware {
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        DB.mongoTemplate=applicationContext.getBean(MongoTemplate.class);
        DB.monitoringItemRepository = applicationContext.getBean(MonitoringItemRepository.class);
    }
}

public class DB {
    public static MongoTemplate mongoTemplate=null;
    public static MonitoringItemRepository monitoringItemRepository = null;
}

References
https://zetcode.com/springboot/applicationcontext/