收集AspectJ切入点上下文并避免提及建议方法的所有参数的问题

Question

我使用AspectJ来检查对象是否属于当前用户。建议的方法实际上是Spring MVC控制器方法。我使用放置在该控制器方法上的注释来应用横切安全建议。

我遇到的问题是控制器方法有很多参数。我想避免提及 aspectJ 源中的所有参数，因为这些参数可以更改（参数名称、类型等），但我仍然必须收集切入点上下文。

为了总结方法中存在的 N 个参数，我只需要使用两个（成员和广告 ID）。如何避免提及 N 参数？

我的切入点：

public pointcut advertisementBelongsToMemberControllerCheck(FamilyAdvertisementInfo familyAdvertisementInfo, long advertisementId, Model model, Member member) 
        : execution(@AdvertisementExistsAndBelongsToMemberCheck * * (..)) 
        && args(familyAdvertisementInfo,advertisementId, model,  member);

我的建议：

before(FamilyAdvertisementInfo familyAdvertisementInfo, long advertisementId, Model model, Member member) : advertisementBelongsToMemberControllerCheck(familyAdvertisementInfo,advertisementId, model,  member) {
        if (!advertisementService.advertisementExistsAndBelongsToMember(advertisementId, member)) {
            throw new AccessDeniedException("Advertisement does not belong to member!");
        }
    }

注释：

@Retention(RetentionPolicy.RUNTIME)
public @interface AdvertisementExistsAndBelongsToMemberCheck {
}

最后，建议的控制器方法：

@RequestMapping(value = "/family/edit/{advertisementId}", method = RequestMethod.GET, produces = "text/html")
@AdvertisementExistsAndBelongsToMemberCheck
public String editFamilyAdvertisementForm(@ModelAttribute FamilyAdvertisementInfo familyAdvertisementInfo, @PathVariable long advertisementId, Model model, @CurrentMember Member member/* the currently logged in user */) {
        FamilyAdvertisement advertisement = advertisementService.findFamilyAdvertisement(advertisementId);
        familyAdvertisementInfo.setFamilyAdvertisement(advertisement);
        populateFamilyAdvertisementModel(model, familyAdvertisementInfo, member);
        return "advertisement/family/edit";
    }

Answer 1

以防万一有人感兴趣，我的问题得到了答案。在这里：

我的切入点：

public pointcut advertisementBelongsToMemberControllerCheck(long advertisementId, Member member) 
: execution(@AdvertisementExistsAndBelongsToMemberCheck * * (..)) 
        && args(*, advertisementId, *, member, ..);

我的建议：

before(long advertisementId, Member member) : advertisementBelongsToMemberControllerCheck(advertisementId, member) {
        if (!advertisementService.advertisementExistsAndBelongsToMember(advertisementId, member)) {
            throw new AccessDeniedException("Advertisement does not belong to member!");
        }
    }

这有效，而且更干净。