Integration testing transactions and optimistic locking with Spring and JUnit

Posted on by

I did some badness today.

I wanted an integration test to check to see if my @Transactional method actually did rollback on an optimistic lock failure. It’s a pretty business critical method so I wanted to be sure that the whole @Transactional and @Version annotation voodoo actually works.

The approach I took was to inject, what I called a “slowRepository” into the object with the @Transactional method. The slowRepository is just a mockito mock of the object which “answers” (using “thenAnswer”) to the “findBy…” with some custom code.

The idea is that at some point during the @Transactional method the slowRepository is called and the “answer” code is invoked. In the test, the answer code follows along the lines of:

1. Grab the data it requires from the (not slow) repository (the repository the slowRepository is mocking)
2. Switch back the slowRepository for the not slow repository
3. Invoke the @Transactional method again on a separate thread
4. Sleep for a bit
5. Wake up and return the data from step 1

The @Transactional call on the separate thread completes and commits before slowRepository wakes up. When it does, slowRepository returns stale data and the @Transactional method then fails accordingly.

The problem I encountered was using the setters for my @Autowired dependencies on the bean with the @Transactional method. I needed to use the setters so that I could switch in and out the slowRepository, but couldn’t because Spring AOP proxies are implementations of an interface, not subclasses (by default – yes I realise you can get Spring to proxy the target class using CGLIB). I found this blog post which explains how to get at the target object behind a Spring proxy. I converted it to Scala:

…which is pretty ninja.

12,393 thoughts on “Integration testing transactions and optimistic locking with Spring and JUnit”

  4. Почему пользователи выбирают площадку KRAKEN?

    Маркетплейс KRAKEN заслужил доверие многочисленной
    аудитории благодаря сочетанию ключевых факторов.
    Во-первых, это широкий и разнообразный ассортимент, представленный сотнями продавцов.
    Во-вторых, интуитивно понятный интерфейс KRAKEN, который упрощает навигацию, поиск
    товаров и управление заказами даже для новых пользователей.
    В-третьих, продуманная система безопасных транзакций,
    включающая механизмы разрешения споров (диспутов) и возможность
    использования условного депонирования, что минимизирует риски для обеих сторон сделки.
    На KRAKEN функциональность сочетается с внимательным
    отношением к безопасности клиентов, что делает процесс
    покупок более предсказуемым, защищенным и,
    как следствие, популярным среди пользователей, ценящих анонимность
    и надежность.

  7. I’m really impressed with your writing skills and also with the
    layout on your blog. Is this a paid theme
    or did you modify it yourself? Either way keep up
    the nice quality writing, it is rare to see a great blog like this one today.

  8. I think that what you said was very logical. However think on this what if you were to write a killer title? I am not saying your content isnt good. but suppose you added a headline to maybe grab folks attention? I mean BLOG_TITLE is a little plain. You should peek at Yahoos front page and note how they create news titles to get people to open the links. You might add a related video or a pic or two to get people excited about everythingve written. Just my opinion it would bring your posts a little livelier. Candy Blitz Bombs

  9. Почему пользователи выбирают площадку KRAKEN?

    Маркетплейс KRAKEN заслужил доверие многочисленной аудитории благодаря сочетанию ключевых факторов.
    Во-первых, это широкий и разнообразный ассортимент,
    представленный сотнями продавцов.
    Во-вторых, интуитивно понятный интерфейс KRAKEN, который упрощает навигацию,
    поиск товаров и управление заказами даже для новых пользователей.
    В-третьих, продуманная система безопасных транзакций,
    включающая механизмы разрешения споров (диспутов) и
    возможность использования условного депонирования, что
    минимизирует риски для обеих сторон сделки.
    На KRAKEN функциональность сочетается с внимательным отношением
    к безопасности клиентов, что делает процесс покупок более предсказуемым, защищенным и, как следствие, популярным среди пользователей, ценящих анонимность и надежность.

  14. در جمع‌بندی نهایی

    برای کسایی که قصد شروع دارن

    بازی‌های شرطی

    سر و کار دارن

    این برند

    می‌تونه انتخاب مناسبی باشه

    انتخاب قابل قبولی باشه

    چیزی که جلب توجه می‌کنه اینه
    که

    پلتفرم‌هایی مثل

    پلتفرم еnfejaronline

    و

    sіb-bet

    در این فضا تاثیرگذارهستن

    در آخر کار

    مناسب بود

    و

    در آینده

    استفاده خواهم کرد

    Alsso visit my hmepage … ویندوز (https://spotlightir.ir/)

  18. If some one needs expert view about blogging and site-building then i propose him/her to go to see this
    blog, Keep up the fastidious job.

  20. bayar bayar bayar bayar bayar bayarbayar bayar bayar bayar bayar bayarbayar
    bayar bayar bayar bayar bayar bayar bayar bayar bayar bayar
    bayarbayar bayar bayar bayar bayar bayarbayar bayar bayar bayar bayar bayar bayar bayar bayar bayar bayar bayarbayar bayar bayar bayar bayar bayarbayar
    bayar bayar bayar bayar bayar bayar bayar bayar bayar bayar bayarbayar bayar bayar bayar bayar bayar

  23. After looking over a few of the blog articles on your blog, I honestly like
    your technique of writing a blog. I bookmarked it to my bookmark
    website list and will be checking back in the near future.
    Please check out my website too and let me know how you feel.

  24. Thanks for another great article. The place else may
    anyone get that type of info in such a perfect way of writing?

    I have a presentation next week, and I’m at the search for such information.

  29. Just wish to say your article is as surprising. The clearness for your post is simply nice and i can suppose youre a professional in this subject. Well along with your permission allow me to grasp your feed to stay updated with approaching post. Thank you 1000000 and please keep up the enjoyable work. Gates of Olympus Super Scatter

  37. Hello there I know this is kinda off topic nevertheless Id figured Id ask. Would you be interested in trading links or maybe guest writing a blog post or vice-versa? My website covers a lot of the same subjects as yours and I believe we could greatly benefit from each other. If youre interested feel free to shoot me an e-mail. I look forward to hearing from you Great blog by the way Big Bass Floats My Boat

  38. Hello there! Quick question that’s totally off topic.
    Do you know how to make your site mobile friendly?
    My website looks weird when viewing from my iphone.
    I’m trying to find a theme or plugin that might be able to correct this problem.
    If you have any suggestions, please share. Appreciate it!

  43. Thank you for the auspicious writeup. It in reality was once a enjoyment account it. Glance complex to more introduced agreeable from you By the way how can we communicate? Gates of Olympus Xmas 1000

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>