当我有两个@Beans时，我应该把@限定符放在哪里？

@Configuration
public class DataSourceConfig {

    @Bean
    public DataSource primaryDataSource() {
        // 配置主数据源
        return new DriverManagerDataSource("jdbc:mysql://localhost:3306/primarydb", "user", "password");
    }

    @Bean
    public DataSource secondaryDataSource() {
        // 配置次数据源
        return new DriverManagerDataSource("jdbc:mysql://localhost:3306/secondarydb", "user", "password");
    }
}

@Service
public class MyService {

    private final DataSource dataSource;

    @Autowired
    public MyService(@Qualifier("primaryDataSource") DataSource dataSource) {
        this.dataSource = dataSource;
    }

    // 使用dataSource进行操作
}