Piotr Olaszewski

Software Architect at Thulium🔸#Java🔸All opinions are mine and only mine

Follow me here 🦋

[Piotr Olaszewski @_piotrooo]

Big congrats to my friend! 🎉

He just launched a family #cardgame called The Elements ♠️🔥🌊

I was lucky to be a tester, and now the crowdfunding is LIVE on @gamefound 🚀
Check it out, like it & support if you vibe with it ❤️

👉 https://t.co/4BBk5kf7Eq

[Piotr Olaszewski @_piotrooo]

@mnhocktweets @jitterted @maciejwalkowiak In Spring Boot 4 where everything will be modularised, you probably won’t need it 🤔

[Piotr Olaszewski @_piotrooo]

Call for Proposals for @spring_io 2026 is open on Sessionize and I've just submitted a session! https://t.co/UkunuN3AQV

What I've done 😱

[Piotr Olaszewski @_piotrooo]

💡 Just in case — if you're using #Embabel with @Gradle, don't forget to add:

repositories {
maven {
url 'https://t.co/EBZqjZfe4y'
}
}

...or enjoy hours of debugging fun™️ 🤡

#ai #agent #embabel #gradle

[Piotr Olaszewski @_piotrooo]

@evansims 🤩 great job @evansims 👏👏👏
It deserves to be an official SDK 🤌

[Spring I/O @spring_io]

🍃 Null Safety in Java with JSpecify and NullAway by @sdeleuze @ Spring I/O 2025

▶️ Video: https://t.co/PLi4kmNwIg

🔗 Slides: https://t.co/hHgwBjdZF0 #springio25

[Piotr Olaszewski @_piotrooo]

If you’re using @Google Cloud #TextToSpeech feature, you might be surprised to find that some voices have been removed 😲

Just in case, here is a helpful doc
👉 https://t.co/2fhv174JDc

[Piotr Olaszewski @_piotrooo]

First blog post in a year — what a streak 😅

I built a simple way to run tests for your @OpenFGA models — including a @GitHub Actions you can plug straight into your workflow.

Check it out 👉 https://t.co/asbDEgTGnv

#OpenFGA #Authorization #GitHub

[Piotr Olaszewski @_piotrooo]

@spring_io @sergialmar @sergialmar any ETA of the rest of the talks? Thanks in advance 🙏

[Piotr Olaszewski @_piotrooo]

Finally 🚀
Thanks to the @SpringAICentral team for that ❤️

#SpringAI #Spring

[Piotr Olaszewski @_piotrooo]

@therealdanvega - Or maybe you’re just cruising around AI and JTE, and those topics aren’t interesting anymore🤔

Some quick stats: out of the last 15 articles, there were:

- 8 about AI
- 5 about JTE
- 2 about Java

[Piotr Olaszewski @_piotrooo]

@kehrlann @piotrprz @intellijidea I were sitting in that chair when the lockdown started - since there weren’t any available in warehouses 🤦‍♂️
I feel it’s as necessary as an @intellijidea license 😅

[Piotr Olaszewski @_piotrooo]

@maciejwalkowiak @springboot @wiremock Thanks for that - Maciek 🙏
The migration has been already completed across all of our services 🤜🤛

[Piotr Olaszewski @_piotrooo]

💎 #JUnit Diamonds 💎

When you are using @ParameterizedTest and want to pass null, use the @NullSource annotation, which provides a single null argument to the method.

https://t.co/bPJ8UGyHM7

[Piotr Olaszewski @_piotrooo]

@alina_yurenko @JohanHutting @kehrlann @alina I hope so 🤞

[Piotr Olaszewski @_piotrooo]

@DevPaco thanks for this talk https://t.co/x3aZ9AQulr @spring_io 🙏

How do you deal with sharing a codestyle checks between multiple repos/projects?

[Piotr Olaszewski @_piotrooo]

I have done a lot of explorations while implementing OTel in our applications.

I considered 3 options:
1⃣OTel JavaAgent
2⃣Micrometer
3⃣OTel Spring Starter

My thoughts:
1⃣Currently, this is the best option for me.
✅I really like the almost out-of-the-box instrumentation for Spring MVC, RestClient, Spring Data, and Spring AMQP (RabbitMQ).
✅Static means of setting traces/spans/context customizers like Span.current().setAttribute() are very convenient (I don't need to inject Tracer).
✅Zero configuration, which doesn't interfere with business code.
❌Missing very convenient SpEL expression support.

2⃣I don't like the amount of manual work and interference with business logic due-to-configuration and injecting traces.
✅Really nice SpEL support.
❌Missing out-of-the-box support for Spring AMQP and Data Repositories.
❌Missing JPA instrumentation.
❌Very inconsistent properties. Figuring out which property to use is a nightmare. Some start with management.opentelemetry.*, others with management.otlp.*, and yet others with management.tracing.*

3⃣This is unusable if you want to follow the latest @springboot versions.

Those were my observations so far. Next week, now I will explore metrics 😉

[Piotr Olaszewski @_piotrooo]

@lobaorn @mnhocktweets As far as I remember, @Ro_Wei talked about sharing rules at @spring_io.

cc: @Ro_Wei