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.

11,693 thoughts on “Integration testing transactions and optimistic locking with Spring and JUnit”

  1. Tema mitologi Yunani dalam Gates of Olympus bukan hanya menarik secara visual, tetapi juga menawarkan simbolisme yang mendalam. Bermain di Gates of Olympus tidak hanya tentang mengejar kemenangan; ini juga tentang merasakan kekuatan dan kejayaan para dewa. Ini adalah permainan yang menawarkan lebih dari sekadar hiburan; ini adalah pengalaman yang memotivasi Anda untuk meraih kekayaan abadi. Yang baru dalam permainan ini adalah Super Scatters. Dapatkan satu Super Scatter saat memicu fitur untuk langsung mendapatkan 100x taruhan, dua Super Scatter menerima 500x, tiga mendapatkan 5.000x, dan jika empat Super Scatter muncul saat memainkan fitur, kemenangan diberikan maksimum 50.000x. pola stabil bet gates of gatot kaca anti rungkad pecah jackpot tertinggi bedah pola auto ajaib gates of olympus
    https://www.uscgq.com/forum/posts.php?forum=general&id=691029&page=1#post0
    Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa Copyright © 2019 Built with love in France Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa Copyright © 2019 Built with love in France T. +351 927 524 965 T. +351 927 524 965 Copyright © 2019 Built with love in France Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa Copyright © 2019 Built with love in France T. +351 927 524 965 Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa E. Copyright © 2019 Built with love in France T. +351 927 524 965 Copyright © 2019 Built with love in France Copyright © 2019 Built with love in France E. Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa E. T. +351 927 524 965 Copyright © 2019 Built with love in France Rua Artilharia 1, n°51, Loja L, 1250-038 Lisboa

  3. It’s actually very complicated in this full of activity
    life to listen news on Television, therefore
    I just use world wide web for that purpose, and obtain the most up-to-date news.

  6. It’s going to be end of mine day, however before finish I
    am reading this impressive post to increase
    my experience.

  9. Hi, all the time i used to check weblog posts here in the early hours in the daylight, because i
    enjoy to find out more and more.

  12. Then we have the Free Spins feature that’s triggered by landing 3 or more Scatter Symbols anywhere on the reels during the base game. During this feature, the Wild Symbols will have a multiplier of up to 5x, depending on the amount of triggering Scatters, while the feature itself can be retriggered! Moreover, the visuals look unfinished and the overall design looks old-fashioned. Points of contact are email, but we’re sure board game fans will love it. In this feature, all wins are paid with an extra 4x multiplier. As a lot of Habanero slots like this one play the same so play some others as well, nothing makes you feel like more a part of the action than when you have money on the line. The game has an average RTP of just 95% unfortunately, as we ensure every game is made from scratch rather than just adding a licences theme on top of a re-skinned title. The main set of reels is a 5×3 format, there are exciting rewards like the daily bonus and VIP loyalty programs players can enjoy.
    https://www.vansamachar.com/17/04/2026/news-post/11183
    Transporting players into the enchanting world of Snow White, the game boasts captivating design elements that evoke fairy tale magic. From beautifully illustrated characters to vibrant backgrounds, every detail exudes charm. The soundtrack further elevates the experience with melodic tunes, immersing players in a whimsical atmosphere. More Magic Apple’s design and soundtrack work harmoniously to ensure a delightful gaming journey reminiscent of the timeless tale of Snow White. Embark on a magical adventure with More Magic Apple, a captivating slot game inspired by the classic tale of Snow White. With its alluring design, immersive soundtrack, and rewarding features like Free Spins and Jackpot wins, the game promises an enchanting gaming experience for players seeking a touch of fairy tale wonder. As you spin the reels, get ready to be spellbound and discover the riches that await in this charming and delightful world.

  13. News 10 SEP 25 The image was taken during his most recent six-month science mission aboard the Space Station, an assignment that concluded earlier this year after 220 days in orbit. Mostbet stands out with its multilingual interface including Hindi and fast payout processing. It offers a 500% bonus up to ₹82,000 plus 400 free spins for the Mostbet Astronaut registration, spread over 5 deposits. The platform supports easy Mostbet Astronaut login and registration, with a demo mode for safe practice. Ms. Williams, who has completed 62 hours over nine spacewalks, holds the record for the most time spent spacewalking by a female astronaut. A fireball spotted over Southern California was likely the flaming wreck of an orbital module from China’s Shenzhou 15 astronaut mission, which launched in November 2022.
    https://desertbuddhafarming.com/spellwin7-casino-review-a-fresh-online-gambling-experience-for-uk-players/
    The Pro Max simply has more room for complex camera hardware, so it is the obvious first stop, as reported by 9to5Mac. Some industry sources say it might hit Pro Max first and then the smaller Pro in later generations, according to Phone Arena. Apple has played that staggered rollout card before. 4. If you want to delete all the duplicates at once, tap the Select button, and then tap Select All. You can also remove them in groups of two or more: Tap Select in the top right corner and then tap the Select button to the right of the pairs. ANDREW CALLAWAY: In 2020, Sam Crane was feeling lost. He’s a professional actor, and he had just booked the gig of a lifetime on London’s West End. But when the pandemic hit, all the theaters shut down and Sam was stuck waiting for the world to reopen. He wasn’t much of a video game person until he saw his son watching YouTube videos of people playing games. Then he realized there was a whole other world that hadn’t shut down. Sam got a hold of his son’s PlayStation and invited some friends to join him online.

  22. Технологии и оборудование играют важную роль в фотографии дают возможность экспериментировать с различными техниками . Лучшие фотографы Москвы знают, как использовать современное оборудование . Они могут использовать различные программы и приложения для редактирования фотографий . Super Joker Megaways is a highly volatile slot with fast-paced gameplay that hinges almost entirely on triggering the Super Win feature often enough. The Super Stake bet makes it easier but also costs double the default stake, hence, we urge some caution on using it. Given the game profile, it can easily eat any balance pretty quickly but also turn around and hit big wins in quick succession.
    https://tdojb.com/download-jackpotjill-casino-australian-players-guide/
    Set on the ocean, Big Bass slot games follow a fisherman on his adventures as he tries to reel in prizes.  At Mecca Bingo, not only can you enjoy some action on the water with Bigger Bass Bonanza, but we also have hundreds of other online casino games too. We’ve got classic slots, Megaways slots, Slingo and more. And don’t miss our iconic and world-famous bingo rooms. It’s easy to play Bigger Bass Bonanza slot. The first thing to do is choose your bet amount and select spin to get those reels moving. The RTP is the ‘return to player’ and this percentage shows how much a slot game, on average, will return to players as a cash win. The Big Bass Bonanza RTP is 96.71% which means that for every £100 wagered, around £96.71 will be paid out. This is calculated over a long period of time and there are never any guarantees of getting a win as slots are games of chance and 100% random.

  23. Some of the best casino games for beginners could fall into the slots or classic slots category. Slots are often deemed some of the best games for beginners due to their straightforward playability, and classic slot games tend to lack any complicated features. Each online slot game can offer something different. If you find a video slot you’re interested in playing and want to learn more about it, you can check out 666 Casino’s detailed ‘Game Reviews’ section. You can also load the slot game and read the game’s paytable or rules for more information. Welcome to Bet442, where the fun of the game meets the excitement of possibility. Whether you’re a fan of classic table games or the dynamic pace of slots, our online casino offers a diverse range of options to suit your interests. 
    https://bahasa138.net/royal-reels-real-money-games-top-choices-for-australians/
    Great commercial offer In Casino Bloke, you get a gambling pal to bank on. Our team of experts is here to inspect, review and rate only those online casinos that you can trust with both your money and time. We provide deep insight into casino bonuses & promotions so you never miss a great deal with an operator of your choice. And ultimately, with a stunning portfolio of casino game reviews on display, we bring the online gaming entertainment to a whole new level. Our manager will reach out to you within the next 24 business hours. A live casino online is a studio which has been set up to mimic a brick-and-mortar casino. You will find blackjack, roulette, and baccarat games that are manned by a real-life dealer. All of the action will be streamed directly to wherever you are via the Internet.

  24. In 2026, WhatsApp marketing at scale demands more than raw accounts — it requires whatsapp hash
    channels. These specially formatted sessions let
    automation tools send bulk messages without QR code logins, dramatically reducing detection risks.
    The whatsapp wart extractor is the industry-standard whatsapp hash channel creator that
    converts any WhatsApp account into ready-to-use hash channels
    in seconds.
    This guide explains everything: the whatsapp hash channel 6 segment format, step-by-step conversion, how to buy whatsapp
    hash channels safely, and proven whatsapp hash channels anti ban tactics that keep accounts
    alive for months.

  29. You’re so awesome! I don’t believe I have read through anything like this before.
    So great to find someone with some unique thoughts on this
    topic. Really.. thank you for starting this up. This
    website is one thing that is required on the internet, someone with some originality!

  30. Hey! I just wanted to ask if you ever have any trouble with hackers?
    My last blog (wordpress) was hacked and I ended up losing months of hard work due to no data
    backup. Do you have any methods to protect against hackers?

  31. I want to to thank you for this wonderful read!! I absolutely enjoyed every bit of it.
    I’ve got you book marked to check out new things you post…

  33. magnificent put up, very informative. I ponder why the other specialists of this sector do not notice this.
    You should proceed your writing. I am sure, you’ve a huge readers’
    base already!

  34. Hey there just wanted to give you a quick heads up.
    The words in your content seem to be running off the
    screen in Firefox. I’m not sure if this is a format issue or something to do with browser
    compatibility but I thought I’d post to let you know.
    The design look great though! Hope you get
    the problem fixed soon. Many thanks

  36. Please let me know if youre looking for a author for your weblog. You have some really great posts and I believe I would be a good asset. If you ever want to take some of the load off Id love to write some content for your blog in exchange for a link back to mine. Please send me an e-mail if interested. Kudos https://share.google/Om5F1xqRY8lUZp7kF

  38. obviously like your web site but you have to test the spelling on quite a few of your
    posts. Several of them are rife with spelling issues and I find it very bothersome to inform the reality nevertheless I’ll surely come again again.

  40. Hi! I just wanted to ask if you ever have any trouble with hackers?

    My last blog (wordpress) was hacked and I ended up losing several weeks of
    hard work due to no data backup. Do you have any methods to stop hackers?

  41. Admiring the commitment you put into your website and detailed information you present.
    It’s good to come across a blog every once in a while that
    isn’t the same outdated rehashed material.
    Great read! I’ve bookmarked your site and I’m
    adding your RSS feeds to my Google account.

  42. An outstanding share! I’ve just forwarded this onto a coworker who had been conducting a little homework on this.
    And he actually bought me dinner because I stumbled upon it
    for him… lol. So allow me to reword this….
    Thank YOU for the meal!! But yeah, thanx for spending time to discuss this subject here
    on your internet site.

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>