Spring boot @服务中的事务性

我已经创建了一个投票应用程序，我有一个改变投票数的方法。它实现了一个带有@Transactional注释的接口

谢谢

VotingService是一个接口。 实现类 在spring中，默认情况下VotingServiceImplic是单例类。它是 线程之间共享。 它不应该具有的实例变量 持有投票信息。

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您可以通过使用postman或jmeter执行并行请求来验证服务的正确性。谢谢您的帮助。我试过jmeter。共测试了23个用户。它本该起作用的。尽管建议在实现中使用事务。

@Transactional(readOnly = true)
public interface VotingService {

    Vote getByRestaurantId(int restaurantId);

    Vote get(int id);

    List<Vote> getWithRestaurantsByDate(LocalDateTime date);

    List<Vote> getWithRestaurantsToday(HttpServletResponse response, int id);

    @Transactional
    Vote voteFor(int restaurantId, int userId);
}

    @Service
    public class VotingServiceImpl implements VotingService {
    ...

    @Override
    public Vote voteFor(int restaurantId, int userId) {
    ...
        Vote vote = getByRestaurantId(restaurantId);
        vote.setNumberOfVotes(vote.getNumberOfVotes() + 1)
    ...
        return vote;
    ...
    }
    ...

    }




@Entity
@Table(name = "votes", uniqueConstraints = {@UniqueConstraint(columnNames = {"restaurant_id", "date", "votes"}, name = "votes_unique_restaurant_date_votes_idx")})
public class Vote extends AbstractEntity {
    @Column(name = "votes")
    private int numberOfVotes;

    @ManyToOne(fetch = FetchType.LAZY)
    @JoinColumn(name = "restaurant_id", nullable = false)
    @NotNull
    private Restaurant restaurant;

    public int getNumberOfVotes() {
        return numberOfVotes;
    }

    public void setNumberOfVotes(int numberOfVotes) {
        this.numberOfVotes = numberOfVotes;
    }

    public Vote() {
    }

    public Restaurant getRestaurant() {
        return restaurant;
    }

    public void setRestaurant(Restaurant restaurant) {
        this.restaurant = restaurant;
    }

    @Override
    public String toString() {
        return "Vote{" +
                super.toString() +
                "numberOfVotes=" + numberOfVotes +
                ", restaurant=" + restaurant +
                '}';
    }
}