spring-reactive

问题 We are using Spring Cloud Reactive Streams with RabbitMQ. Spring Reactive Stream appears to acknowledge the message as soon as it pulls it off the queue. So any errors unhandled exceptions that happens during the message processing need to be handled in the application (which is a different than a non-reactive stream where unhandled exceptions can be thrown and a message would be rejected, thus sending it to a dead letter queue). How are we supposed to deal with a sudden shutdown in an

问题 Is it possible to do something like the code below? I have one service that makes an API call and another one which returns a stream of values. I need to modify every value by the value returned by the API call. return Flux.zip( someMono.get(), someFlux.Get(), (d, t) -> { //HERE D IS ALWAYS THE SAME AND T IS EVERY NEW FLUX VALUE }); I've tried with .repeat() for the Mono and it works, but it's calling the method every time there's a new Flux value and it's a API call, so it's not good. Is it

问题 I'm trying to add a conditional Retry for WebClient with Kotlin Coroutines + WebFlux.fn + reactor-addons: suspend fun ClientResponse.asResponse(): ServerResponse = status(statusCode()) .headers { headerConsumer -> headerConsumer.addAll(headers().asHttpHeaders()) } .body(bodyToMono(DataBuffer::class.java), DataBuffer::class.java) .retryWhen { Retry.onlyIf { ctx: RetryContext<Throwable> -> (ctx.exception() as? WebClientResponseException)?.statusCode in retryableErrorCodes } .exponentialBackoff

问题 I'm trying to add a conditional Retry for WebClient with Kotlin Coroutines + WebFlux.fn + reactor-addons: suspend fun ClientResponse.asResponse(): ServerResponse = status(statusCode()) .headers { headerConsumer -> headerConsumer.addAll(headers().asHttpHeaders()) } .body(bodyToMono(DataBuffer::class.java), DataBuffer::class.java) .retryWhen { Retry.onlyIf { ctx: RetryContext<Throwable> -> (ctx.exception() as? WebClientResponseException)?.statusCode in retryableErrorCodes } .exponentialBackoff

问题 Lets consider following code: List<Mono<String>> monoList= apiCall(); List<Disposable> disposableList = monoList.stream() .map(m-> m.subscribe(str-> { log.info("Mono is finished with "+ str); }) ).collect(Collectors.toList()); // I need to await here I need to await when all mono will be finished. How could I achieve it? 回答1: Not mixing different streaming APIs you could utilize side effects instead of subscriptions and await completion with then() Mono<Void> await = Flux .fromIterable

问题 List<Mono<String>> responses = apiCall() I would like to get Flux<String> to await all mono-s from list. How could I achieve it ? P.S. I've found similar question but I need vice versa operation https://stackoverflow.com/a/44040346/2674303 回答1: You could use Flux.mergeSequential() and Flux.collectList() Mono<List<String>> list = Flux.mergeSequential(apiCall()).collectList(); 来源： https://stackoverflow.com/questions/58913554/how-to-convert-listmonostring-into-fluxliststring

问题 I tested a little around with the proposal in this thread: flux within executorservice and i have simplified the example a little to understand it easier. So, heres the example: ExecutorService executorService = Executors.newSingleThreadExecutor(); Flux.just("1", "2", "3").subscribeOn(Schedulers.fromExecutorService(executorService)).doOnNext(System.out::println).subscribe(); try { executorService.awaitTermination(10, TimeUnit.SECONDS); } catch (InterruptedException e) { // TODO Auto-generated

问题 I have following code: List<Mono<MyResponseDTO>> monoList = queue.stream() .map(jobStatusBunch -> webClient .post() .uri("localhost:8080/api/some/url") .bodyValue(convertToRequestDto(someBean)) .retrieve() .toEntity(String.class) .filter(HttpEntity::hasBody) .map(stringResponseEntity -> { try { return objectMapper.readValue(stringResponseEntity.getBody(), MyResponseDTO.class); } catch (JsonProcessingException e) { log.error("Can't parse", e); return null; } }) .doOnNext(myResponseDTO -> { log