Convert From Flux To Mono
Answer : Instead of take(1) , you could use next() . This will transform the Flux into a valued Mono by taking the first emitted item, or an empty Mono if the Flux is empty itself. Here is a list: Flux#single will work if there is one element from Flux . Eg: flux.take(1).single(); Flux#next will get you the first element. Eg: flux.next(); Flux#last for last element. Eg: flux.last(); Flux#singleOrEmpty is similar to Optional . Eg: flux.take(0).singleOrEmpty(); Flux#collect , it depends on use case. flux.collect(Collectors.reducing((i1, i2) -> i1)) .map(op -> op.get()); Flux#elementAt for i'th index. Eg: flux.elementAt(1); Flux#publishNext for first found element. flux.publishNext(); Flux#reduce for reduction op. Eg: flux.reduce((i1,i2) -> i1);