Immutables

v2.12.1 released. Mostly fixes for some cases and added Java 25/javac to the build matrix. As always, want to thank all for bug reports and PRs!

3/3 ... and many more, and, at last, some more documentation on the updated immutables.org !

The release is called "12 Anniversary Edition". Yep, 12 years since late 2013/early 2014 when first pre-1.0 releases of Immutables were published. Now we have first-class record builders, improved nullable as type annotations (JSpecify), Jackson 3 integration 2/2+1

I want to thank you all contributors for all the bug reports, PRs, and feedback, that's enormous and helped project to catch up in 2025! Today we've released v2.12.0 , which is a minor update, but sort of concludes all updates, bug-fixes and refinements done this year. 1/2

@vavr_io well, conventional wisdom says you can break compat in minor versions while below 1.0, i.e. in 0.xx, so no remorse)

@ImmutablesOrg Goal: Vavr should be a synonym for ‚no-brainer‘ or ‚super-dead-simple‘. Switchable behavior would mean ‚magic‘. The behavior must be clear when looking at the code. I‘m a friend of leaving questionable features away instead of offering all imaginable possibilities.

There will be a Vavr 0.10 release before 1.0 is final. Would you embrace a safe💫 Try.get() by changing the exception type to a non-fatal runtime exception (which wraps the original exception)? That was the case prior to Vavr 0.9. Discuss! 👈🏼

@vavr_io this is probably overthinking, what if dependencies expect different behavior regardless of switch. not insisting it's a good idea, but it should be ok )

@ImmutablesOrg What if the transitive dependencies rely on different behavior? Say - Dep A -> Vavr (switch ‚on‘) - Dep B -> Vavr (switch ‚off‘) Sounds fragile

@vavr_io can retain compatibility, but make future behavior available under system property, for example

In Vavr 0.9.3 Try.get() sneaky throws. v0.9: #get--" target="_blank" rel="nofollow noopener">static.javadoc.io/io.vavr/vavr/0…

@nicolai86 Aside from the main guide., here's what might be somewhat helpful: integration with @vavr_io (has persistent collections) github.com/immutables/imm… or how to integrate other arbitrary libraries immutables.github.io/encoding.html

'no' votes matter, if in doubt, vote 'no' is ok ) Concerns and wishlists are welcome

In 2019, should there be Immutables3 — a fully modular and extendable, Java11+ with batteries included, but a lot of obsolete baggage dropped?

@talios @ndasriaux @AmiraultTony @vavr_io not really, but you can put abstract and case-like classes under umbrella type and generate tree transformers and visitors

@ndasriaux @ImmutablesOrg @AmiraultTony @vavr_io Immutables does ADTs? Since when? Or do mean just that they can (manually)...

“Is it better to write vavr-ified code than idiomatic Java code? I’m sure yes.”

@AmiraultTony @vavr_io @ImmutablesOrg And yes, @vavr_io and @ImmutablesOrg together is a match made in heaven. You can encode immutable objects and ADTs in Immutables and even pattern match on ADTs in Vavr. Typing even more along the way, making your code explicit.

One of those rare moments when left previous employer and have not started a new job yet, so enjoying dedicating some time to Immutables maintenance

v2.7.3 released with the important fix for broken "from" methods with Modifiable #273-2018-11-10" target="_blank" rel="nofollow noopener">github.com/immutables/imm…

@charlielamothe jfyi actually released 2.7.2 yesterday, just cannot update the site yet to increment version

@charlielamothe definitely, 2.7.2 is being prepared to be released, I expect this week! thank you

@ImmutablesOrg I'm excited to use Immutables Mongo with Jackson. It's the only library that correctly deserializes my use of generics + subtypes. Is there a release on the horizon?

Hanging at QConSF, hope to see folks )

Version 2.7.2 released! Thank you for issue reports and PRs with fixes, corrections, and features!!! Release notes #272-2018-11-05" target="_blank" rel="nofollow noopener">github.com/immutables/imm…

You want to use @ImmutablesOrg in your #FrontEnd? #dominokit made it easy, checkout github.com/DominoKit/gwt-…

2.7.1 was released with fixes, PRs and refinements, see changelog #changelog" target="_blank" rel="nofollow noopener">github.com/immutables/imm… Thank you for issue reports, questions, PRs and for you patience!