<https://twitter.com/sdeleuze/status/9148165719855...

# spring

[sdeleuze]

https://twitter.com/sdeleuze/status/914816571985580032

[x80486]

@sdeleuze Is JPA finally included? 🤔

[sdeleuze]

@x80486 Included in what ?

[x80486]

Spring Data now supports #Reactive repositories and #Kotlin <- Is Spring Data JPA also included?

[sdeleuze]

In Reactive support no, JPA is blocking by design

[sdeleuze]

JPA support take avantage of null-safe APIs

[sdeleuze]

Not of immutable class support since object mapping is handled by the underlying JPA implementation

[sdeleuze]

And JPA require a default constructor

[sdeleuze]

(could be not public)

[sdeleuze]

So yes it is included in Spring Data Kay but leverage only a subset of Kotlin related features and can't leverage Reactive support

[x80486]

Got it, but I thought that, at some point, Spring Data JPA will be doing something similar to, for instance, what Vert.x guys have for their JDBC module...

[sdeleuze]

Not sure yet, it is already possible to wrap blocking JDBC or JPA blocking calls into dedicated schedulers via Reactor publishOn / subscribeOn. I guess we could provide some facilities for such use case, but currently our recommendation if more to use Spring MVC if you need to use such blocking library.

[sdeleuze]

Also first class non-blocking SQL drivers may come at some point

[x80486]

That would be great! Let me upgrade and try this new one in the meantime...thanks!

[sdeleuze]

Any feedback welcome, also if you have example of WebFlux + JPA wrapped into schedulers via Reactor publishOn + subscribeOn don't hesitate to share.

[sdeleuze]

@dh44t That could be also an interesting blog post as a follow up of https://medium.com/@mario.arias.c/spring-5-jdbc-support-for-kotlin-7cc31f4db4a5, explain what is currently required to run it via WebFlux, pros and cons

[sdeleuze]

Or maybe just discussing that here before a blog post as you prefer

[sdeleuze]

Maybe with a few extensions we could make that usable easily

[sdeleuze]

Or maybe just a wrapper for JDBC template specifying the scheduler to use for running JDBC requests and use the right method (publishOn or subscribeOn) on each JdbcTemplate method

[sdeleuze]

Not exactly JdbcTemplate methods but reactive variants

[sdeleuze]

Returning Mono<T> of the original T return type

[dh44t]

Sounds good

[dh44t]

Let's say ReactiveJdbcTemplate, develop in Java or Kotlin?

[dh44t]

Maybe Java based with Kotlin extensions?

[sdeleuze]

See https://kotlinlang.slack.com/archives/C0B8ZTWE4/p1506957211000447