London Java Community Live User group Sessionize Event Upcoming

NLJUG (Netherlands Java User Group) Speaker Academy 2024 - Session II

C.R.a.C in Spring - I just froze my service!

Starting up complex enterprise Java applications may take a long time and you may not want to wait that long when scaling or deploying. Project CRaC, meaning Coordinated Restore at Checkpoint allows us to save the state of a service. It means that we can literally pause the runtime at a certain checkpoint and restore the service quickly at that point at any point in time.

For Spring services, we can pause them and safely perform updates to our cloud environment without the need to reinitialize them, because we can resume their runtime after the checkpoint.

In this session I will show my experience with Project CRaC, what it means to pause a service, and how to manage the generated files and state. You'll leave this session knowing that there is yet another alternative for startup times beyond GraalVM or other native compilation solutions, which will empower you to make even better decisions for your project

At the speaker session, the whole session had to be reduced to 15 minutes, turning into a short reflection about the potential usage of it and how to use it from a technical perspective.

The session is available on two document repositories:
- Scribd: https://www.scribd.com/presentation/783555869/C-R-a-C-in-Spring-I-froze-my-server-15-minute-session-for-NLJUG-speaker-academy
- Slide-share: https://www.slideshare.net/slideshow/c-r-a-c-in-spring-i-froze-my-server-15-minute-session-for-nljug-speaker-academy/272673111

Meetup London Java Community (LJC)

My presentation was incorporated into a two-presentation Meetup session at the London Java Community group at the Couchbase Headquarters in 55 King William Street.

Title: Could Virtual Threads cast away the usage of Kotlin Coroutines? What experience can tell us:

How do Virtual Threads can potentially affect the development of resilient services? If you are implementing services in the JVM, odds are that you are using the Spring Framework. As the development of possibilities for the JVM continues, Spring is constantly evolving. This presentation for the London Java Community (LJC) was created to spark that discussion and makes us reflect about out available options so that we can do our best to make the best decisions going forward.

There are no videos, or photos available for the event, but I did make a video with an extended version of that presentation. I talk about these topics in a very casual way and I also explain why and how the tests were performed:

- https://youtu.be/SNocP3qWOHs

Documentation on Scribd:
- https://www.scribd.com/presentation/768072685/Could-Virtual-Threads-Cast-Away-the-Usage-of-Kotlin-Coroutines
- https://www.slideshare.net/slideshow/could-virtual-threads-cast-away-the-usage-of-kotlin-coroutines/271727680

More info on the event:
- https://www.meetup.com/londonjavacommunity/events/302808393
- https://www.eventbrite.co.uk/e/ljc-meet-up-tickets-988279208717

Kotlin MeetUp Amsterdam @ JetBrains! Kotlin Notebooks, Decoding Kotlin & more!

My presentation was incorporated into a 3 presentation Meetup session. The name for that session was: "Kotlin MeetUp Amsterdam @ JetBrains! Kotlin Notebooks, Decoding Kotlin & more!"

Title: "Decoding Kotlin - Your guide to solving the mysterious in Kotlin" - This was my session on this meetup at the JetBrains offices about 5 curiosities about the Kotlin programming language. I have a made a post event video about it. It is not a video of the event, but it is a video about the event and about the topics of the event:

https://www.youtube.com/watch?v=CrCVdE2dUQ8

The documentation about this talk is available here:

https://www.scribd.com/presentation/726367924/Decoding-Kotlin-Your-Guide-to-Solving-the-Mysterious-in-Kotlin

Open Hack Night #21: Reactive programming in Spring Webflux @ Eonics

In this session I have discussed reactive programming with WebFlux. The slides are available here:

Scribd: https://www.scribd.com/presentation/709501358/Reactive-Programming-With-Spring-Webflux-Eonics-Hack-Night-21
Slide-share: https://www.slideshare.net/slideshow/reactive-programming-with-spring-webfluxpptx/266559708

Meetup: https://www.meetup.com/eonics-open-hack-night/events/268235492/