Using spring 5, with reactor we have the following need.
Mono<TheResponseObject> getItemById(String id){
return webClient.uri('/foo').retrieve().bodyToMono(TheResponseObject)
}
Mono<List<String>> getItemIds(){
return webClient.uri('/ids').retrieve().bodyToMono(List)
}
Mono<RichResonseObject> getRichResponse(){
Mono<List> listOfIds = Mono.getItemIds()
listOfIds.each({ String id ->
? << getItemById(id) //<<< how do we convert a list of ids in a Mono to a Flux
})
Mono<Object> someOtherMono = getOtherMono()
return Mono.zip((? as Flux).collectAsList(), someOtherMono).map({
Tuple2<List, Object> pair ->
return new RichResonseObject(pair.getT1(), pair.getT2())
}).cast(RichResonseObject)
}
What approaches are possible to convert a Mono<List<String>> to a Flux<String>?
This should work. Given List of Strings in Mono
Mono<List<String>> listOfIds;
Flux<String> idFlux = listOfIds
.flatMapMany(ids -> Flux.fromArray(ids.toArray(new String [0])));
Even better would be
listOfIds.flatMapMany(Flux::fromIterable)