相关疑难解决方法(0)

我正在练习 DDD，我有一个非常简单的例子，目前看起来像这样：

Polling
    getEventBus() -> Bus
    getEventStorage() -> Storage
    getMemberRepository() -> MemberRepository
    getCategoryRepository() -> CategoryRepository
    getBrandRepository() -> BrandRepository
    getModelRepository() -> ModelRepository
    getVoteRepository() -> VoteRepository

MemberRepository
    MemberRepository(eventBus, eventStorage)
    registerMember(id, uri)
        -> MemberRegistered(id, uri, date)
        -> MemberRegistrationFailed //when id or uri is not unique
    isMemberWithIdRegistered(id)
    isMemberWithUriRegistered(uri)

CategoryRepository
    CategoryRepository(eventBus, eventStorage) {
    addCategory(id, name)
        -> CategoryAdded(id, name, date)
        -> CategoryAdditionFailed //when id or name is not unique
    isCategoryWithIdAdded(id)
    isCategoryWithNameAdded(name)
};

BrandRepository
    CategoryRepository(eventBus, eventStorage) {
    addBrand(id, name)
        -> BrandAdded(id, name, date)
        -> BrandAdditionFailed //when id …