Hi Pascal, As far as I know, you can't create sub-pipeline within a DoFn, i.e. nested pipelines are not supported.
Best, Robin On Thu, Aug 16, 2018 at 7:03 AM Pascal Gula <[email protected]> wrote: > As a bonus, here is a simplified diagram view of the use-case: > > Cheers, > Pascal > > > On Thu, Aug 16, 2018 at 3:12 PM, Pascal Gula <[email protected]> wrote: > >> Hello, >> I am currently evaluating Apache Beam (later executing on Google >> DataFlow), and for the first use-case I am working on, I have a kinda >> design question to see if any of you already had a similar one. >> Namely, we have a DB describing dashboards views, and for each views, we >> would like to perform some aggregation transform. >> My first approach would be to create a higher level pipeline that will >> fetch all view configurations from our mongoDB (BTW, we released a mongoDB >> IO connector here: https://pypi.org/project/beam-extended/). With this >> views PColl, the idea is to have a ParDo, with a DoFn that will create >> sub-pipleine to perform the aggregation on data from our plant database >> with a qurey derived from the view configuration. Afterwards, the idea is >> to save for the higher level pipeline, some performance/data metrics >> related to the execution of the array of sub-pipeline. >> The main question is: are nested pipeline supported by the runner? >> I hope that my description was clear enough. I will work on a diagram >> view meanwhile. >> Very best regards, >> Pascal >> >> -- >> >> Pascal Gula >> Senior Data Engineer / Scientist >> +49 (0)176 34232684www.plantix.net <http://plantix.net/> >> PEAT GmbH >> Kastanienallee 4 >> 10435 Berlin // Germany >> <https://play.google.com/store/apps/details?id=com.peat.GartenBank>Download >> the App! <https://play.google.com/store/apps/details?id=com.peat.GartenBank> >> >> > > > -- > > Pascal Gula > Senior Data Engineer / Scientist > +49 (0)176 34232684www.plantix.net <http://plantix.net/> > PEAT GmbH > Kastanienallee 4 > 10435 Berlin // Germany > <https://play.google.com/store/apps/details?id=com.peat.GartenBank>Download > the App! <https://play.google.com/store/apps/details?id=com.peat.GartenBank> > >
