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Jonatan Ivanov

@jonatan-ivanov.bsky.social
1K followers 268 following 177 posts

@micrometer.io and @spring.io maintainer, Spring Observability Team member, Open Sourcerer, Speaker, @seattlejug.bsky.social co-organizer, Java Champion

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Reposted by Jonatan Ivanov
Daniel Garnier-Moiroux @garnier.wf · 17/09/2026
Hey Spring fam 🍃 My early access book "Testing Spring Boot Applications" with @manning.com is Deal of The Day. Get 45% off the book, and a selection of other testing books, here: hubs.la/Q03-d27Y0 First 4 chapters online, the 5th is coming out soon, and putting finishing touches to chapter 6.
Poster for "testing spring boot applications"
It reads "deal of the day! September 17th"
Tagline "Build a solid mental model of what's happening in your Spring Boot test suite.
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Tadaya Tsuyukubo @ttddyy.net · 15/09/2026
🚀 Datasource Micrometer v2.3.0 and v1.5.0 are out! Highlights: • Customize when DataSource beans are instrumented • Cache JdbcConnectionInfo per DataSource Release notes: github.com/jdbc-observa... #SpringBoot #Micrometer #Observability #JDBC
github.com
v1.5 and v2.3 Release Notes
Micrometer Observation API instrumentation and Spring Boot 3/4 Auto-Configuration for JDBC APIs - jdbc-observations/datasource-micrometer
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 31/08/2026
OSError(28, 'No queda espacio en el dispositivo') Then you realize you set the language to es_US.UTF-8 instead of en_US.UTF-8. :D
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Reposted by Jonatan Ivanov
Zach Leatherman @zachleat.com · 01/07/2026
Today the good people of the world commemorate the passing of Google Reader thirteen short years ago on July 1, 2013. To honor their memory (and in lieu of flowers) please add an RSS/Atom/JSON feed to your web site and keep building a web that connects people in meaningful and positive ways.
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dev2next.bsky.social @dev2next.bsky.social · 26/06/2026
Students: Want to attend #dev2next for free? 🎓 We're offering 25 free passes for full-time students. Attend technical sessions, learn from industry experts, connect with developers and architects, and explore what's next in software engineering. 🔗 www.dev2next.com/student #StudentPass #Software
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Spring I/O @springio.net · 04/05/2026
🍃 I Can See Clearly Now: Observability of JVM & Spring Boot 2-3-4 apps by @jonatan-ivanov.bsky.social and @tommyludwig.bsky.social @ Spring I/O 2026 ▶️ Video: youtu.be/CForWeFM8aI 🔗 Slides: speakerdeck.com/jonatan_ivan... 🛠️Repo: github.com/jonatan-ivan... #springio26
youtu.be
I Can See Clearly Now: Observability of JVM & Spring Boot 2-3-4 apps @ Spring I/O 2026
YouTube video by Spring I/O
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Reposted by Jonatan Ivanov
Moo Yu (Mythmatch on Switch and Steam Now!) @oneofmoo.bsky.social · 26/03/2026
Made very few changes to the latest build and was thinking maybe I'll be able to ship this one without incrementing the shame version (last number in a version number) and 2 minutes into testing, it's already getting bumped.
A graphic showing "Pride Versioning" where the first number is the Proud Version. Then second is the Default Version. And the last number is the Shame Version.
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Toshiaki Maki @ik.am · 24/02/2026
Making Maven Users Use JSpecify/NullAway More Easily with the Nullability Maven Plugin ik.am/entries/900/en
ik.am
Making Maven Users Use JSpecify/NullAway More Easily with the Nullability Maven Plugin - IK.AM
This article introduces how to introduce JSpecify and NullAway in Maven and simplify the configuration with the Nullability Maven Plugin.
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Reposted by Jonatan Ivanov
Stefano Cordio @scordio.github.io · 15/04/2026
Today, from the venue of Spring I/O, I'm open-sourcing a new library to make data-driven testing in Java a little bit easier: JUnit Converters! A collection of ready-to-use argument converters designed to streamline parameterized testing in JUnit 6 (and 5!) 🚀 🧵 stefano.codes/junit-conver...
stefano.codes
JUnit Converters
Collection of argument converters for JUnit parameterized testing
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Reposted by Jonatan Ivanov
Daniel Garnier-Moiroux @garnier.wf · 08/04/2026
Hey Spring fans 🍃 My book "Testing Spring Boot Applications" is in early access with @manning.com. We made a short video to tell you all about it: www.youtube.com/watch?v=aAFK... It's 50% until April 16th with the promo code MLGarniermoiroux. Check it out: hubs.la/Q0473JRG0
youtube.com
Testing Spring Boot Apps Without Losing Your Mind
YouTube video by Manning Publications
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 08/04/2026
I'll be speaking together with @tommyludwig.bsky.social at @springio.net 2026 on Apr 13-15. Let us know if you will be there, you can meet us at the Spring both or after our talk! #springio26 2026.springio.net/sessions/i-c...
2026.springio.net
Spring I/O • 13-15 • April • Barcelona 2026
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Reposted by Jonatan Ivanov
Portland Java User Group @pjug.bsky.social · 30/03/2026
the next Portland Java User Group meetup is Tuesday April 14 This month’s topic is: AI Assisted Software Development Presented by: Sean Sullivan @tinyrobots.bsky.social
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Phil Webb 🍃 @philwebb.dev · 20/03/2026
Spring Boot 4.1.0-M3 has is available now! spring.io/blog/2026/03...
spring.io
Spring Boot 4.1.0-M3 available now
Level up your Java code and explore what Spring can do for you.
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Reposted by Jonatan Ivanov
Daniel Garnier-Moiroux @garnier.wf · 19/03/2026
Friends! You like my 3-hour conference talks about Spring stuff? Then you'll love my new project, the "Testing Spring Boot Applications" book with @manning.com ! It's in early access. Read the first four chapters now, get the full book on release. It's 50% off until April 2nd: hubs.la/Q0473JRG0
hubs.la
Testing Spring Boot Applications - Daniel Garnier-Moiroux
@‌SpringBootTest, MockMvcTester, SpringExtension, and the rest of the Spring Boot testing toolbox are incredibly powerful weapons—once you learn how to wield them. Testing Spring Boot Applications in...
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Reposted by Jonatan Ivanov
Moritz Halbritter @0.5ritter.de · 19/03/2026
On behalf of the team and everyone who has contributed, I'm happy to announce that Spring Boot 4.0.4 has been released and is now available from Maven Central. spring.io/blog/2026/03... I hope it's not 404ing. #java #spring #springboot
spring.io
Spring Boot 4.0.4 available now
Level up your Java code and explore what Spring can do for you.
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Reposted by Jonatan Ivanov
Tadaya Tsuyukubo @ttddyy.net · 17/03/2026
🚀 Datasource Micrometer v1.4.0 and v2.2.0 are now available on Maven Central! Highlights: • SPRING_PROXY is now the default proxy strategy • Proper support for Spring Cloud refresh scope with HikariCP Release Notes: github.com/jdbc-observa... #springboot #micrometer #observability #jdbc
github.com
v1.4 and v2.2 Release Notes
Micrometer Observation API instrumentation and Spring Boot 3 Auto-Configuration for JDBC APIs - jdbc-observations/datasource-micrometer
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 15/03/2026
When I tell people I'm a software engineer, I'm sometimes asked: "how many computer do you have?". Well, I have a laptop, a Rasperry Pi and uhm, well, it depends... (Also, exactly when does this count as an addiction? 😃)
8 different calculators
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Reposted by Jonatan Ivanov
Micrometer @micrometer.io · 11/03/2026
Reminder to sign up for the pre-conference observability workshop with the Micrometer team at Spring I/O
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 11/03/2026
The next @seattlejug.bsky.social event is about @brjavaman.bsky.social helping you to turbocharge your career! luma.com/b0ei556v?utm... www.meetup.com/seajug/event...
luma.com
The Reputation Formula: Turbocharge Your Developer Career · Luma
Get ready to level up your career in software development with the secret sauce just for developers - the "Reputation Formula" that can skyrocket your…
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Reposted by Jonatan Ivanov
Moritz Halbritter @0.5ritter.de · 09/03/2026
I'll be talking in April at Spring I/O 2026 about the new stuff in Spring Boot 4. Looking forward to it! 2026.springio.net/sessions/spr... @springio.net #spring #springboot
2026.springio.net
Spring I/O • 13-15 • April • Barcelona 2026
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Devnexus @devnexus.bsky.social · 06/03/2026
And that’s a wrap on #Devnexus 2026! 🎉 Huge thanks to our attendees, speakers, sponsors, and volunteers for making this year unforgettable. The energy, learning, and community are what make it special. 🤩 What were your favorite moments? See you next year!🚀
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 06/03/2026
If you are interested in Observability and you are at @devnexus.bsky.social, please consider my talk today: devnexus.com/events/i-can...
devnexus.com
I Can See Clearly Now: Observability of JVM & Spring Boot 2-3-4 apps
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 05/03/2026
My talk is tomorrow @devnexus.bsky.social, please consider coming if you are interested in Observability. devnexus.com/events/i-can... Also, you can collect my card if you are participating in the card game.
Jonatan's Devnexus plying card in front of a laptop screen showing the description of his talk.
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 14/02/2026
The next @seattlejug.bsky.social event is "Building Reliable workflows in Java": Meetup: www.meetup.com/seajug/event... Luma: luma.com/wzzmruqe?utm...
meetup.com
Building Reliable workflows in Java, Tue, Feb 24, 2026, 6:00 PM | Meetup
**Details** So you have a new Workflow in your application. Let's say that it has 20 steps in the workflow * What happens if the instance handling the workflow goes down *
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Reposted by Jonatan Ivanov
Micrometer @micrometer.io · 10/02/2026
tracing 1.7.0-M3 has been released! Check out the changelog at github.com/micrometer-metrics/traci…
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Reposted by Jonatan Ivanov
Micrometer @micrometer.io · 10/02/2026
micrometer 1.17.0-M2 has been released! Check out the changelog at github.com/micrometer-metrics/micro…
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Reposted by Jonatan Ivanov
Tadaya Tsuyukubo @ttddyy.net · 10/02/2026
Datasource Micrometer 1.3.1 & 2.1.1 are out 🎉 Fixed a silly typo: postgres → postgresql This is what patch versions are for 😄 #SpringBoot #Observability #Micrometer #JDBC
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Reposted by Jonatan Ivanov
Tadaya Tsuyukubo @ttddyy.net · 03/02/2026
The new versions of Datasource Micrometer (v1.3.0 and v2.1.0) are now available in start.spring.io. Selecting “OpenTelemetry” in addition to “Datasource Micrometer” will automatically add the new OpenTelemetry module. github.com/spring-io/st... #SpringBoot #Observability #Micrometer #OpenTelemetry
start.spring.io
Spring Initializr
Initializr generates spring boot project with just what you need to start quickly!
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Reposted by Jonatan Ivanov
Tadaya Tsuyukubo @ttddyy.net · 29/01/2026
🚀 Datasource Micrometer "v1.3.0" (Boot 3.x) and "v2.1.0" (Boot 4.x) are out on Maven Central! ✨ Initial OpenTelemetry Semantic Conventions support via "datasource-micrometer-opentelemetry" module. 📖 Docs: jdbc-observations.github.io/datasource-m... #SpringBoot #Micrometer #OpenTelemetry #jdbc
jdbc-observations.github.io
Datasource Micrometer Reference Documentation
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Reposted by Jonatan Ivanov
lihaoyi.com @lihaoyi.com · 27/01/2026
v1.1.0 of the Mill Build Tool for #Java #Scala and #Kotlin is out, with support for declarative builds and single-file scripts. Check it out! mill-build.org/blog/17-simp...
mill-build.org
Simpler JVM Project Setup with Mill 1.1.0 :: The Mill Build Tool
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Reposted by Jonatan Ivanov
Toshiaki Maki @ik.am · 26/01/2026
Instrumenting JDBC Operations in a Spring Boot Application with Datasource Micrometer ik.am/entries/894/en
ik.am
Instrumenting JDBC Operations in a Spring Boot Application with Datasource Micrometer - IK.AM
In this article, we show how to use Datasource Micrometer with Spring Boot to instrument JDBC operations and visualize SQL logs, traces, and metrics in Grafana.
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Reposted by Jonatan Ivanov
Spring I/O @springio.net · 21/01/2026
🔍 Learn how to instrument your app for metrics, traces & logs, integrate with OpenTelemetry, and troubleshoot faster with real code samples. Join our hands-on "Observability with Micrometer & Spring Boot 3 + 4" pre-conference workshop with @jonatan-ivanov.bsky.social & @tommyludwig.bsky.social g
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 21/01/2026
Apparently the Cinema didn't joke when they said: it's popcorn day, bring your own bucket and we will fill it with popcorn for $5. (That's 20L of popcorn.) (Or 5 gallons.)
A man standing with a 20 liter bucket filled with popcorn.
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Josh Long 🍃 @starbuxman.joshlong.com · 15/01/2026
Hi, Spring fans! This week we catch up with the observably awesome Jonatan Ivanov on how to measure all the things with Micrometer bootifulpodcast.podbean.com/e/jonat…
bootifulpodcast.podbean.com
Jonatan Ivanov on how to measure all the things with Micrometer | A Bootiful Podcast
Hi, Spring fans! This week we catch up with the observably awesome Jonatan Ivanov on how to measure all the things with Micrometer
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 15/01/2026
I'm presenting on Spring and Observability at @devnexus.bsky.social in early March. Devnexus is the biggest Java conference in the USA, I highly recommend it! This promo code gives you 30% discount on ticket prices: SPEAK30. devnexus.com
devnexus.com
Devnexus 2026
The longest-running and Largest Java Ecosystem Conference in the World.
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Marcin Grzejszczak @toomuchcoding.com · 12/01/2026
It's fantastic to see yet another project pick #micrometerio as the entry point to their observability story! I'm so proud to have co-authored the observation api. Remember: "instrument once and have multiple benefits out of it" hc.apache.org/httpcomponen...
hc.apache.org
Apache HttpComponents – Observability (Micrometer / OpenTelemetry)
Since 5.6, HttpClient ships an optional module, httpclient5-observation, that plugs straight into Micrometer (metrics + observations) and can bridge to OpenTelemetry (traces). The goal is simple:…
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 09/01/2026
If you prefer Luma instead of Meetup, I created the events there too. Jan. 20th, To Java 26 and Beyond! luma.com/n2kwz59y?utm... Jan. 29th, Scotty, I need Warp Speed - Ways to improve the JVM startup/warmup luma.com/5bljvhgz?utm...
luma.com
To Java 26 and Beyond! · Luma
Java 25 has been released, but the Java release train continues chugging along with Java 26. In this presentation we will start with a quick review of the key…
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 08/01/2026
@seattlejug.bsky.social will organize two events in January! Jan. 20th, @billykorando.bsky.social: what's new in recent versions of Java www.meetup.com/seajug/event... Jan. 29th, @hansolo.eu: solutions to reduce JVM startup time www.meetup.com/seajug/event...
meetup.com
To Java 26 and Beyond!, Tue, Jan 20, 2026, 6:00 PM | Meetup
Java 25 has been released, but the Java release train continues chugging along with Java 26. In this presentation we will start with a quick review of the key changes from
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 31/12/2025
Thank you @sharatchander.bsky.social, Jim, and the Java Devrel Team! :)
Happy Holidays note and Java 30th anniversary coin
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Dan Vega @danvega.dev · 23/12/2025
Spring Boot 4 finally has a dedicated OpenTelemetry starter. No more pulling in actuator just for observability. Metrics, traces, and logs via OTLP out of the box. youtu.be/6_Y41z7OIv8
youtu.be
Spring Boot 4 OpenTelemetry: From Zero to Full Observability in Minutes
YouTube video by Dan Vega
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Devnexus @devnexus.bsky.social · 19/12/2025
If your Spring Boot apps behave like gremlins after midnight, it’s time for observability.🧌 Join @jonatan-ivanov.bsky.social at #Devnexus to learn how to instrument JVM apps using Micrometer, OpenTelemetry, Prometheus, and more, without vendor lock-in. devnexus.com/events/i-can... 🎟️ devnexus.com
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Tadaya Tsuyukubo @ttddyy.net · 17/12/2025
🎉 Great news! Datasource Micrometer is now available on start.spring.io. You can now create a new Spring project with Datasource observation enabled out of the box. #Spring #SpringBoot #Micrometer #Observability #JDBC
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 12/12/2025
Coffee and Software live stream with @starbuxman.joshlong.com and me starts soon: www.youtube.com/watch?v=Atif...
youtube.com
Micrometer legend Jonatan Ivanov
YouTube video by Coffee + Software
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Marcin Grzejszczak @toomuchcoding.com · 08/12/2025
Good morning! If it's time for you to get your morning coffee how about you take a look at my new blog post about the story of Micrometer Observation? Grab it while it's hot 😀 toomuchcoding.com/post/2025-12...
toomuchcoding.com
The Story Of Micrometer Observation | TooMuchCoding
In this blog post we'll look into why and how Micrometer Observation was founded
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 27/11/2025
Not your average conference event: star party at @dev2next.bsky.social 2025. Michael Carducci is at the telescope and @ramnivas.com is at the binoculars on a DIY bungee cord-plywood tripod adapter. 😄
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Jonatan Ivanov @jonatan-ivanov.bsky.social · 22/11/2025
Kids, don't forget to take your favorite JMH benchmarks and JCStress tests for observing sessions in case you or someone else need a laptop dew heater. What do you think, what the @Warmup annotation is for? 😃
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Tadaya Tsuyukubo @ttddyy.net · 21/11/2025
🚀 Datasource Micrometer v2.0.0 is now live on Maven Central! ✨ Fully compatible with Spring Boot 4.0.0 🛠️ Next up: OpenTelemetry semantic conversion support #jdbc #micrometer #micrometer #Observability #SpringBoot
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Phil Webb 🍃 @philwebb.dev · 20/11/2025
Spring Boot 4.0.0 is available now!! spring.io/blog/2025/11...
spring.io
Spring Boot 4.0.0 available now
Level up your Java code and explore what Spring can do for you.
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Phil Webb 🍃 @philwebb.dev · 20/11/2025
Myself and @0.5ritter.de are joining the Spring Office Hours podcast today. Join us in about 40 mins (12pm pacific). spring-office-hours.transistor.fm
spring-office-hours.transistor.fm
Spring Office Hours
Join Dan Vega and DaShaun Carter as they explore what’s new in the world of Spring. This is your chance to stay connected to what’s happening with the Spring Framework, related projects, and the commu...
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tinyrobots.bsky.social @tinyrobots.bsky.social · 19/11/2025
thanks for attending the Seattle Java User Group last night @jonatan-ivanov.bsky.social @cowtowncoder.bsky.social @seattlejug.bsky.social Slides are available here: docs.google.com/presentation...
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