R2DBC support

[mirromutth]

R2DBC (Reactive Relational Database Connectivity) is for reactive programming and containing concise SPI. Looks like it will be very well integrated with the DSL-style frameworks.

See:

• R2DBC SPI: https://github.com/r2dbc/r2dbc-spi
• JavaDoc: https://r2dbc.io/spec/0.8.0.M8/api

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[fzoli]

I wrote a reference implementation.

[riba2101]

So..its been almost a year, can we at least get an answer? will/wont do/prs accepted etc

[jwgmeligmeyling]

PR's will be accepted :) But no, this is not a priority of the core team.

[riba2101]

wow that was fast, tnx man :)
Ok, will try to find time in the next month

[riba2101]

@jwgmeligmeyling - for R2DBC we would need to bump the min version of java to 1.8, would that be ok?

[idosal]

@riba2101 Yes, it's on the roadmap for 5.0.

[jwgmeligmeyling]

Yes, and if you implement it in a dedicated module (querydsl-r2dbc) only that module has to be JDK8 afaik. So that also helps while the other modules are still on Java 7. But with 5.x we'll go to Java 8 anyway.

[riba2101]

oh sry, was kinda busy - yeah that's how I've started and exactly how it's currently implemented, and yes, you are correct, a single module can have a different compile version

[riba2101]

Hey guys, so...the changes are kinda huge...dunno how you guys wanna do this? (atm it's only compiling, need to test is extensively)

I would also like to point out that its heavily based on @fzoli s example

[lpandzic]

If you want to use R2DBC with Querydsl now and are using Spring Data, Infobip Spring Data Querydsl now has R2DBC support.
Example usage:

interface TRepository extends ReactiveSortingRepository<T, ID>, ReactiveQuerydslPredicateExecutor<T>, QuerydslR2dbcFragment<T> {
}

QuerydslJdbcFragment provides access to SQLQuery, SQLUpdateClause and delete with Predicate support.

[j30ng]

Hi all, when will #2610 be merged? Anything remains to be done?