Question

我有以下代码：

 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.info("doOnNext is invoked");
                        })
                ).collect(Collectors.toList());
        //await when all MONOs are completed
        Mono<Void> mono = Flux.fromIterable(monoList).then();
        mono.subscribe(aVoid -> {
            log.info("!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!");
        });

webClient实例化：

this.webClient = WebClient.builder().build();

我的目标是允许并行执行队列中的所有http请求，并在所有请求完成时等待。但是，尽管队列不为空，但实际的http调用并未发生。您能解释为什么以及如何解决它吗？

更新

感谢@ caco3的建议。我更正了这样的代码：

log.info("Start waiting for {}", monoList);
Mono<Void> mono = Flux.fromIterable(monoList)
        .flatMap(Function.identity())
        .then();
log.info("Finished waiting for {}", monoList);

我看到以下日志：

2019-11-19 19:17:17.733  INFO 5896 --- [   scheduling-1] c.b.m.service.MyService     : Start waiting for [MonoPeek]
2019-11-19 19:17:25.988  INFO 5896 --- [   scheduling-1] c.b.m.service.MyService     : Finished waiting for [MonoPeek]
2019-11-19 19:17:26.015 TRACE 5896 --- [   scheduling-1] o.s.w.r.f.client.ExchangeFunctions       : [c42c1c2] HTTP POST localhost:8080/api/some/url, headers={}
2019-11-19 19:17:48.230  INFO 5896 --- [tor-http-nio-11] c.b.m.service.MyService     : doOnNext is invoked

所以当前代码不会等待所有请求终止，但是我真的很需要

为什么webClient不进行任何http调用？

更新

0 个答案: