Springboot v2.0.0.M6 WebClient 进行多次重复的 HTTP POST 调用

Pra*_*ath 6 java spring-boot spring-webflux

我正在使用 spring-boot 版本 2.0.0.M6。我需要从 spring-boot 应用程序(例如 APP1)到另一个应用程序(播放框架)(例如 APP2)进行异步 HTTP 调用。因此,如果我需要从 APP1 到 APP2 进行 20 个不同的异步调用,APP2 会收到 20 个请求,其中很少是重复的,这意味着这些重复替换了几个不同的请求。预期的:

api/v1/call/1
api/v1/call/2
api/v1/call/3
api/v1/call/4
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实际的:

api/v1/call/1
api/v1/call/2
api/v1/call/4
api/v1/call/4
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我正在使用 spring 反应式 WebClient。

下面是 build.gradle 中的 spring boot 版本

buildscript {
ext {
    springBootVersion = '2.0.0.M6'
    //springBootVersion = '2.0.0.BUILD-SNAPSHOT'
}
repositories {
    mavenCentral()
    maven { url "https://repo.spring.io/snapshot" }
    maven { url "https://repo.spring.io/milestone" }
    maven {url "https://plugins.gradle.org/m2/"}
}
dependencies {
    classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    classpath("se.transmode.gradle:gradle-docker:1.2")


}
}
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我的 WebClient 初始化代码段

private WebClient webClient = WebClient.builder()
        .clientConnector(new ReactorClientHttpConnector((HttpClientOptions.Builder builder) -> builder.disablePool()))
        .build();
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我的POST方法

public <T> Mono<JsonNode> postClient(String url, T postData) {
    return Mono.subscriberContext().flatMap(ctx -> {
        String cookieString = ctx.getOrDefault(Constants.SubscriberContextConstnats.COOKIES, StringUtils.EMPTY);
        URI uri = URI.create(url);
        return webClient.post().uri(uri).body(BodyInserters.fromObject(postData)).header(HttpHeaders.COOKIE, cookieString)
          .exchange().flatMap(clientResponse ->
          {
              return clientResponse.bodyToMono(JsonNode.class);
          })
         .onErrorMap(err -> new TurtleException(err.getMessage(), err))
         .doOnSuccess(jsonData -> {
         });
    });
}
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调用此 postClient 方法的代码

private void getResultByKey(PremiumRequestHandler request, String key, BrokerConfig brokerConfig) {

    /* Live calls for the insurers */
    LOG.info("[PREMIUM SERVICE] LIVE CALLLLL MADE FOR: " + key + " AND REQUEST ID: " + request.getRequestId());

    String uri = brokerConfig.getHostUrl() + verticalResolver.determineResultUrl(request.getVertical()) + key;
    LOG.info("[PREMIUM SERVICE] LIVE CALL WITH URI : " + uri + " FOR REQUEST ID: " + request.getRequestId());
    Mono<PremiumResponse> premiumResponse = reactiveWebClient.postClient(uri, request.getPremiumRequest())
            .map(json -> PlatformUtils.mapToClass(json, PremiumResponse.class));

    premiumResponse.subscribe(resp -> {
        resp.getPremiumResults().forEach(result -> {
            LOG.info("Key " + result.getKey());

            repository.getResultRepoRawType(request.getVertical())
                    .save(result).subscribe();
            saveResult.subscriberContext(ctx -> {

                MultiBrokerMongoDBFactory.setDatabaseNameForCurrentThread(brokerConfig.getBroker());
                return ctx;
            }).subscribe();
        });
    }, error -> {
        LOG.info("[PREMIUM SERVICE] ERROR RECIEVED FOR " + key + " AND REQUEST ID" + request.getRequestId() + " > " + error.getMessage());
    });

}
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已经把日志放在客户端代码的端点,在那个点看不到多个请求。

可能是 WebClient 中的一个错误,其中 URI 在多线程环境中被交换。

尝试改变 WebClient,URI 仍然被交换

请帮忙。

Git Repo 添加了github.com/praveenk007/ps-demo

sec*_*tar 0

添加我的一些观察:

webClient.get()或者webClient.post()总是DefaultRequestBodyUriSpec在每次调用时返回 new URI,我认为它看起来不像URI被交换。

class DefaultWebClient implements WebClient {

..
    @Override
    public RequestHeadersUriSpec<?> get() {
        return methodInternal(HttpMethod.GET);
    }
    @Override
    public RequestBodyUriSpec post() {
        return methodInternal(HttpMethod.POST);
    }


..


    @Override
    public Mono<ClientResponse> exchange() {
        ClientRequest request = (this.inserter != null ?
                initRequestBuilder().body(this.inserter).build() :
                initRequestBuilder().build());
        return exchangeFunction.exchange(request).switchIfEmpty(NO_HTTP_CLIENT_RESPONSE_ERROR);
    }

    private ClientRequest.Builder initRequestBuilder() {
        URI uri = (this.uri != null ? this.uri : uriBuilderFactory.expand(""));
        return ClientRequest.create(this.httpMethod, uri)
                .headers(headers -> headers.addAll(initHeaders()))
                .cookies(cookies -> cookies.addAll(initCookies()))
                .attributes(attributes -> attributes.putAll(this.attributes));
    }
..
}
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方法methodInternal如下所示

@SuppressWarnings("unchecked")
private RequestBodyUriSpec methodInternal(HttpMethod httpMethod) {
    return new DefaultRequestBodyUriSpec(httpMethod);
}
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此外,在提出实际请求时,ClientRequest也会创建新的。

类源

https://github.com/spring-projects/spring-framework/blob/master/spring-webflux/src/main/java/org/springframework/web/reactive/function/client/DefaultWebClient.java