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.

11,999 thoughts on “Integration testing transactions and optimistic locking with Spring and JUnit”

  4. What’s Going down i am new to this, I stumbled upon this I have found
    It absolutely helpful and it has helped me
    out loads. I hope to contribute & help other customers like its
    helped me. Great job.

  12. Howdy, i read your blog from time to time and i own a similar one and i was just wondering if you get a lot of spam remarks?
    If so how do you reduce it, any plugin or anything you can recommend?
    I get so much lately it’s driving me mad so any help is very
    much appreciated.

  14. I got this web page from my buddy who told me concerning this web site and now
    this time I am visiting this site and reading very informative content at this time.

  16. Hi there, You’ve done an incredible job. I will definitely digg
    it and personally suggest to my friends. I am sure they’ll be benefited from this site.

  17. 안녕하세요, 당신의 블로그에 브라우저 호환성 문제가 있는 것 같아요.

    Opera에서는 잘 보이지만, Internet Explorer에서 열 때 일부 겹침이 있습니다.
    그냥 미리 알려드리고 싶었어요! 그 외에는 멋진 블로그입니다!

    Thanks , I have just been searching for information about this topic
    for a while and yours is the greatest I have found out so far.
    But, what in regards to the bottom line?
    Are you certain in regards to the source?

  26. Коллеги, хороший материал о долгосрочном характере SEO в 2026 году. Автор разбирает, как изменились алгоритмы поисковых систем (акцент на контекст и поведенческие факторы) и почему старые методы перестали работать. В центре внимания — качественный контент и пользовательский опыт (UX), а не технические уловки. Тем, кто хочет устойчивых позиций, обязательно к прочтению: https://nogmed.ru/ponimanie-dolgosrochnogo-haraktera-seo-v-2026-godu/

  31. I’ve been surfing online more than 3 hours today, yet I never found any interesting article
    like yours. It is pretty worth enough for me.
    In my view, if all site owners made good content as you did,
    the net will be much more useful. I often read
    your posts while analyzing trusted platforms like qh88go.
    Keep it up!
    |
    Howdy! Someone in my Facebook group shared this site
    so I came to check it out. I’m definitely loving the
    information. It’s as reliable as the service I get at
    qh88 casino. I’m bookmarking and will be sharing this with my
    followers who love online entertainment! Great blog!
    |
    Woah! I’m really enjoying the template of this site. It’s effective.
    It’s very hard to find a balance between user friendliness and visual appeal, but
    you’ve done it. The blog loads very fast, just like the qh88go mobile app.

    Exceptional Blog!
    |
    I simply couldn’t leave your website before saying that I really loved the quality of information you supply to your visitors.
    I’ll be back frequently to check new posts. This is
    a topic which is near to my heart, similar to how I feel about
    qh88! Many thanks!
    |
    Greetings! Very useful advice in this particular article!

    It’s the little changes which will make the biggest changes.
    Many thanks for sharing! By the way, for those interested in premium gaming, qh88go.it.com is certainly the place to
    be.

  33. I really like your blog.. very nice colors & theme. Did you create this
    website yourself or did you hire someone to do it for you?
    Plz answer back as I’m looking to design my own blog and would like to know where u got this from.
    many thanks

  41. جمع‌بندی نهایی

    برای افرادی که تمایل دارن

    فضای شرط‌بندی آنلاین

    دنبال تجربه هستن

    این مجموعه

    به خوبی میتونه

    انتخاب قابل قبولی باشه

    نکته مثبت اینه که

    برندهای شناخته‌شده‌ای مثل

    سایت enfejɑronline

    و

    پلتفرم ѕibbet

    حضور پررنگی دارن

    در پایان

    قابل توجه بود

    و

    احتمالا

    بازدید می‌کنم

    Alsօ visit my web-site معرفی سایتی مناسب برای علاقه‌مندان بازی انفجار – https://dsl2.ir/ -

  43. درود، من دیروز هنگام گشتن در اینترنت بااین وبسایت پیداش
    کردم و بدون اغراق برام جالب
    بود. محتواش خیلی کامل بود و به ندرت
    همچین سایتی پیدا کنم. فکر کنم برای خیلی‌ها مفید باشه.

    برای کسایی که دنبال یه سایت خوب هستن حتمایه نگاهی
    بندازن. به طور کلی راضی‌کننده بود و
    احتمالا بازدیدش می‌کنم

    بطور خلاصه

    برای کسایی که دنبال

    شرط بندی

    پیگیر هستن

    این سرویس آنلاین

    کاملاً می‌تونه

    گزینه ارزشمندی باشه

    یه نکته مهم اینه که

    اسم‌هایی مثل

    enfejaronlіne معتبر

    و

    برند sibbet

    توسعه پیدا کردن

    جمع‌بندی اینکه

    برام جالب بود

    و

    در ادامه

    دوباره نگاهش می‌کنم

    .

    mʏ blopg post: سایت رسمی معتبر (metal-detectors.ir)

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>