Spring@Service线程中的class字段安全吗?[副本]

@Slf4j
@Service
public class SendServiceImpl implements SendService {

    private final MessageService messageService;

    private Message message;

    public SendServiceImpl (MessageService messageService) {
        this.messageService = messageService;
    }

    @Transactional
    @Override
    public void send(String messageGuid) {
            message = messageService.getOne(messageGuid);
            //...
    }

taskExecutor.execute(() -> sendService .send(someGuid);//5 different guids

message 如果我像类字段一样声明消息?

有人能详细解释一下吗?