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Description
Migrate from RxJava2 to Reactor.
Motivation and Context
As RxJava2 has been EOL it would be good to migrate to something else.
The following options were considered
Micronaut had also migrated from RxJava2 to Reactor instead of migrating to RxJava3. This would also align with Spring and reduce having an additional library if the Spring Reactive stack is used. The R2DBC drivers are implemented using Reactor.
How Has This Been Tested?
Added tests and existing tests passed. Also tested with the elide-spring-boot-example.
License
I confirm that this contribution is made under an Apache 2.0 license and that I have the authority necessary to make this contribution on behalf of its copyright owner.