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.

15,060 thoughts on “Integration testing transactions and optimistic locking with Spring and JUnit”

  4. Самара всем привет Близкий человек уже две недели в запое Родственники в полном отчаянии Скорая не приедет на такой вызов Короче врачи стационара реально вытащили — капельница от запоя в стационаре круглосуточно Врачи и медсёстры 24/7 В общем вся инфа по ссылке — выведение из запоя стационар https://lechenie.vyvod-iz-zapoya-v-stacionare-samara12.ru Не ждите пока станет хуже Перешлите тем кто в беде

  6. Екатеринбург всем привет Муж просто потерял себя Жена в истерике Таблетки не помогают Короче только капельница реально спасла — поставить капельницу от запоя на дому цена выгодная Поставили капельницу с детоксикационным раствором В общем жмите чтобы сохранить — капельница при алкогольной интоксикации цена https://pomosch-alkogolizm.kapelnicza-ot-zapoya-ekaterinburg-nmx.ru Капельница от запоя — это реальный выход Перешлите тем кто в такой же ситуации

  8. Cartoon Yourself : Toonify ToonCamera: If you have an iPhone, you’ll adore using Toon Camera to record movies and turn photos into cartoons because it provides a wide variety of cartoon, stipple, ink, and pencil effects. Additionally, it provides a real-time preview of each effect you choose, allowing you to see how your images and videos will turn out even before you take them. Cartoonifying your picture is a fun way to express creativity and transform yourself into an anime character or cartoon image. Whether you’re looking for a new profile picture or just want to jump on the trending ‘cartoonify’ bandwagon on TikTok, these tools and tutorials should have you covered. Don’t forget to add your original sound to your creation when sharing on TikTok! Featuring highly advanced AI tools, Cartoonify allows you to convert photos into animated portraits or artistic caricatures. The app includes filters tailored for a wide variety of aesthetics, such as turning selfies into 3D avatars, anime-inspired characters, and even oil painting-style images. Creating these unique visuals is simple, with just a few taps needed to elevate standard photos into dynamic, shareable artworks.
    https://forctipcheaper1971.raidersfanteamshop.com/discover-more-here
    Using music from Soundstripe has been a game-changer for Visit Big Bear, allowing us to perfectly match the dynamic energy of our community with a diverse range of music, from tourism videos to event promos and social media. Blurrr-Music Video Editor App I am absolutely blown away by FlexClip! This video creation platform is an absolute game-changer. I was able to make a professional-looking video in minutes, without any prior experience. The interface is super easy to use and the editing tools are top-notch. Highly recommend to anyone looking to make videos quickly and easily! Filmora was designed to help content creators produce fun videos for YouTube and other social sharing sites. Using the software doesn’t require much video editing experience or technical expertise and its streamlined features are easy to use. Professional video editors will be disappointed that they can’t complete more advanced or precise edits, but most users will appreciate how easy it is to put together professional-quality videos. The software’s latest version includes keyframing, color matching, and motion tracking.

  9. Movavi Video Editor is a video maker and editor that helps you to create eye-catching videos for your own personal or business use. It’s about as easy as they come, and you could be posting videos in just a few minutes! Movavi offers a free trial that allows you to explore its features and decide if it fits your expectations. The free version included the Movavi Video Suite, Movavi Video Editor, Movavi Video Converter, and Movavi Video Recorder as well. New York, New York–(Newsfile Corp. – October 9, 2024) – Movavi has just unveiled a significant update to their acclaimed video editing software, Movavi Video Editor, as detailed on their official website. Renowned for its blend of power and user-friendliness, Movavi Video Editor now promises an even more enhanced editing experience with its latest features.
    https://pohodapridedovke.sk/2026/05/13/casino-purple-login-an-online-casino-review-for-players-from-the-united-kingdom/
    Big Bass Bonanza slot has gained a strong following due to its straightforward gameplay and engaging bonus features, including multipliers, wild symbols and a fisherman collection mechanic that adds extra ways to win. To access the Free Spins bonus game in Bigger Bass Bonanza, you need to land at least three Scatter symbols in a single spin. Collecting three, four, or five Scatters rewards you with 10, 15, or 20 Free Spins respectively. bigbassbonanza.bet4.3 The Tribe did not establish a meaningful risk of irreparable harm based on speculative revenue decreases, we have decided to give Metal a 4,7 score on our FindFairCasinos Fair Barometer. Brazino777 Casino is a betting site which certainly offers a great selection of games, play bigger bass bonanza slot online methodical and fast. French is not supported which is bad news for Canadian players, and also withdrawals.

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>