Reactor: change Scheduler from elastic to worker












1















I have the pipeline like this (contextMono is Mono):



    contextMono

      .map(this::doLogic)

      .map(this::doLogic1)

      .flatMap(ctx -> Mono

                   .fromCallable(() -> doWithData(ctx))

                   .publishOn(Schedulers.elastic())

      .map(this::buildReturnValue)


This pipeline executes in thread called like http-server-epoll-65 (epoll worker group). From flatMap executes in elastic's thread (because of publishOn(Schedulers.elastic())). This group (elastic) of threads uses for flatMap and for last map (buildReturnValue).



But I want buildReturnValue to be executed in group of epoll-workers threads (server-epoll-65 or other).
I do not want to use Schedulers.elastic() for non-I/O (blocking) tasks.



How I can change back to workers-epoll group of Schedulers?






java project-reactor







share|improve this question

























  • You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

    – JEY
    Nov 27 '18 at 12:31











  • @JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

    – mchernyakov
    Nov 27 '18 at 13:07
















1















I have the pipeline like this (contextMono is Mono):



    contextMono

      .map(this::doLogic)

      .map(this::doLogic1)

      .flatMap(ctx -> Mono

                   .fromCallable(() -> doWithData(ctx))

                   .publishOn(Schedulers.elastic())

      .map(this::buildReturnValue)


This pipeline executes in thread called like http-server-epoll-65 (epoll worker group). From flatMap executes in elastic's thread (because of publishOn(Schedulers.elastic())). This group (elastic) of threads uses for flatMap and for last map (buildReturnValue).



But I want buildReturnValue to be executed in group of epoll-workers threads (server-epoll-65 or other).
I do not want to use Schedulers.elastic() for non-I/O (blocking) tasks.



How I can change back to workers-epoll group of Schedulers?






java project-reactor







share|improve this question

























  • You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

    – JEY
    Nov 27 '18 at 12:31











  • @JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

    – mchernyakov
    Nov 27 '18 at 13:07














1












1








1


1






I have the pipeline like this (contextMono is Mono):



    contextMono

      .map(this::doLogic)

      .map(this::doLogic1)

      .flatMap(ctx -> Mono

                   .fromCallable(() -> doWithData(ctx))

                   .publishOn(Schedulers.elastic())

      .map(this::buildReturnValue)


This pipeline executes in thread called like http-server-epoll-65 (epoll worker group). From flatMap executes in elastic's thread (because of publishOn(Schedulers.elastic())). This group (elastic) of threads uses for flatMap and for last map (buildReturnValue).



But I want buildReturnValue to be executed in group of epoll-workers threads (server-epoll-65 or other).
I do not want to use Schedulers.elastic() for non-I/O (blocking) tasks.



How I can change back to workers-epoll group of Schedulers?






java project-reactor







share|improve this question
















I have the pipeline like this (contextMono is Mono):



    contextMono

      .map(this::doLogic)

      .map(this::doLogic1)

      .flatMap(ctx -> Mono

                   .fromCallable(() -> doWithData(ctx))

                   .publishOn(Schedulers.elastic())

      .map(this::buildReturnValue)


This pipeline executes in thread called like http-server-epoll-65 (epoll worker group). From flatMap executes in elastic's thread (because of publishOn(Schedulers.elastic())). This group (elastic) of threads uses for flatMap and for last map (buildReturnValue).



But I want buildReturnValue to be executed in group of epoll-workers threads (server-epoll-65 or other).
I do not want to use Schedulers.elastic() for non-I/O (blocking) tasks.



How I can change back to workers-epoll group of Schedulers?






java project-reactor




java project-reactor






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 27 '18 at 12:13









Nicholas K

7,33661536




7,33661536










asked Nov 27 '18 at 11:15









mchernyakovmchernyakov

4616




4616













  • You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

    – JEY
    Nov 27 '18 at 12:31











  • @JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

    – mchernyakov
    Nov 27 '18 at 13:07



















  • You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

    – JEY
    Nov 27 '18 at 12:31











  • @JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

    – mchernyakov
    Nov 27 '18 at 13:07

















You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

– JEY
Nov 27 '18 at 12:31





You could use publishOn after the flatMap but don't know how to retrieve the previous scheduler used before the flatMap.

– JEY
Nov 27 '18 at 12:31













@JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

– mchernyakov
Nov 27 '18 at 13:07





@JEY yes, I know this trick, I can use publishOn(Schedulers.parallel()) but it is not good enough, because it will use extra threads.

– mchernyakov
Nov 27 '18 at 13:07












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