package Ġcom . bs ch and ram oh an . learn . spring connect . spring data reactive . repository Ċ Ċ import Ġcom . bs ch and ram oh an . learn . spring connect . spring data reactive . domain . Link Ċ import Ġorg . springframework . data . mongodb . repository . Reactive Mongo Repository Ċ import Ġreactor . core . publisher . Flux Ċ Ċ interface ĠLink Repository Ġ: ĠReactive Mongo Repository < Link , ĠString > Ġ{ ĊĠĠĠ Ġfun ĠfindBy UserId ( userId : ĠString ): ĠFlux < Link > Ċ } Ċ