project-reactor

问题 It seems like it the Spring RestTemplate isn't able to stream a response directly to file without buffering it all in memory. What is the proper to achieve this using the newer Spring 5 WebClient ? WebClient client = WebClient.create("https://example.com"); client.get().uri(".../{name}", name).accept(MediaType.APPLICATION_OCTET_STREAM) ....? I see people have found a few workarounds/hacks to this issue with RestTemplate , but I am more interested in doing it the proper way with the WebClient

问题 I inherited responsibility for a REST service written in Java using Spring and associated libraries including Reactor. For expensive operations like REST calls out or database operations the code is extensively wrapping the results in Reactor Mono. There are all sorts of things that need to be addressed in the code but one that keeps showing up is nested flatMap s over Mono s for sequences of expensive operations that end up up indented several levels deep into an unreadable mess. I find it

问题 I inherited responsibility for a REST service written in Java using Spring and associated libraries including Reactor. For expensive operations like REST calls out or database operations the code is extensively wrapping the results in Reactor Mono. There are all sorts of things that need to be addressed in the code but one that keeps showing up is nested flatMap s over Mono s for sequences of expensive operations that end up up indented several levels deep into an unreadable mess. I find it

问题 I've been working in Spring Reactor and had some previous testing that made me wonder how Fluxes handle backpressure by default. I know that onBackpressureBuffer and such exist, and I have also read that RxJava defaults to unbounded until you define whether to buffer, drop, etc. So, can anyone clarify for me: What is the default backpressure behavior for a Flux in Reactor 3? I tried searching for the answer but didn't find any clear answers, only definitions of Backpressure or that answer

问题 I've been working in Spring Reactor and had some previous testing that made me wonder how Fluxes handle backpressure by default. I know that onBackpressureBuffer and such exist, and I have also read that RxJava defaults to unbounded until you define whether to buffer, drop, etc. So, can anyone clarify for me: What is the default backpressure behavior for a Flux in Reactor 3? I tried searching for the answer but didn't find any clear answers, only definitions of Backpressure or that answer

问题 If, in a main() method, I execute this Flux.just(1,2) .log() .subscribe(); I get this in the console: [ INFO] (main) | onSubscribe([Synchronous Fuseable] FluxArray.ArraySubscription) [ INFO] (main) | request(unbounded) [ INFO] (main) | onNext(1) [ INFO] (main) | onNext(2) [ INFO] (main) | onComplete() If instead of just() I use the interval() method: Flux.interval(Duration.ofMillis(100)) .take(2) .log() .subscribe(); the elements are not logged, unless I add Thread.sleep() which gives me: [

问题 I am looking at some examples of reactive web applications and i am seeing them like this @RequestMapping(value = "/{id}", method = RequestMethod.GET) @ResponseBody public Mono<Person> findById(...) { return exampleService.findById(...); } @RequestMapping(method = RequestMethod.GET, produces = MediaType.TEXT_EVENT_STREAM_VALUE) @ResponseBody public Flux<Person> findAll() { Flux<Person> persons = exampleService.findAll(); return persons; } When i am reading about the Mono and Flux in the

问题 I am looking at some examples of reactive web applications and i am seeing them like this @RequestMapping(value = "/{id}", method = RequestMethod.GET) @ResponseBody public Mono<Person> findById(...) { return exampleService.findById(...); } @RequestMapping(method = RequestMethod.GET, produces = MediaType.TEXT_EVENT_STREAM_VALUE) @ResponseBody public Flux<Person> findAll() { Flux<Person> persons = exampleService.findAll(); return persons; } When i am reading about the Mono and Flux in the

问题 I am receiving some XML payload in a POST request and want to see the payload as received for debugging purposes. Below (my custom WebFilter) code logs the URI and request headers as expected but not the request body/payload, must be something wrong with my reactive code - final ServerHttpRequest request = exchange.getRequest(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); LOGGER.info("Request: uri={}", request.getURI()); LOGGER.info("Request: headers={}", request.getHeaders()

问题 I use Spring WebFlux (Project Reactor) and I'm facing the following problem: I have to get some data from db to use them to call another service - everything in one stream. How to do that? public Mono<MyObj> saveObj(Mono<MyObj> obj) { return obj .flatMap( ob-> Mono.zip( repo1.save( ...), repo2 .saveAll(...) .collectList(), repo3 .saveAll(...) .collectList()) .map(this::createSpecificObject)) .doOnNext(item-> createObjAndCallAnotherService(item)); } private void createObjAndCallAnotherService