Spring WebFlux：WebClient结合了2个反应式RESTful Web服务

Question

public Flux<Question> getQuestions(String categoryId) {
    WebClient client = WebClient
        .builder()
        .baseUrl(getServiceUrl())
        .build();

    WebClient.ResponseSpec responseSpec = client
        .get()
        .uri("/questions/" + categoryId)
        .retrieve();

    return responseSpec.bodyToFlux(Question.class);
}

OptionServiceImpl：

public Flux<Option> getOptions(String questionId) {
    WebClient client = WebClient
            .builder()
            .baseUrl(getServiceUrl())
            .build();

        WebClient.ResponseSpec responseSpec = client
            .get()
            .uri("/options/" + questionId)
            .retrieve();

        return responseSpec.bodyToFlux(Option.class);
}

但我不知道如何以反应的方式将一个问题和它的选项结合起来。谁能提点主意吗？

更新的解决方案：

@Data
@AllArgsConstructor 
public class CompositeQuestion {

    private String id;

    private String description;

    private String categoryId;

    private List<Option> options;

现在要获取一个问题的列表选项,我的代码如下：

Flux<CompositeQuestion> compositQuestion = questionsFromCoreQuestionService.flatMap(question ->
        optionService.getOptions(question.getId())
            .collectList()
            .map(options -> new CompositeQuestion(question.getId(), question.getDescription(), question.getCategoryId(), options)))
        .subscribeOn(Schedulers.elastic());

Answer 1

让我们假设您有一个如下所示的类：

@Value
public class QuestionOptions {
     private Question question;
     private List<Option> options;
}

(@value注释来自龙目岛）

您可以检索具有如下选项的问题：

Flux<String> categoryIds = Flux.just("1", "2", "3");
Flux<QuestionOptions> questionOptions = 
    categoryIds.flatMap(categoryId -> 
         // retrieve questions for each category
         questionService.getQuestions(categoryId)
              // get options for each question 
              .flatMap(question -> optionService.getOptions(question.getId())
              .collectList()
              .map(optionList -> new QuestionOptions(question, optionList))
         ))
    .subscribeOn(Schedulers.elastic()); // retrieve each question on a different thread.