如何返回 Mono<ServerResponse>答案

【问题标题】：How to return Mono<ServerResponse>如何返回 Mono<ServerResponse>
【发布时间】：2021-09-09 22:24:42
【问题描述】：

请参阅下面代码的 cmets 部分中嵌入的我的问题 -

// This should return a list of all ids and their name and status info, e.g. as json
public Mono<ServerResponse> f1(String originalId) {

    // this gives list of ids which are comma separated       
    Mono<String> ids = f2(originalId);
    ids.flatMapIterable(line -> Arrays.asList(line.split(COMMA)))
            .doOnNext(id -> {
                Mono<String> idName = f3(id);
                Mono<String> idStatus = f4(id);

                Mono<Tuple2<String, String>> combined = Mono.zip(idName, idStatus);

                // How do i return all the combined Mono tuples as Mono<ServerResponse>
            }).subscribe();

    // Need to return proper Mono - not empty         
    return Mono.empty();
}

我也不确定是否应该返回 Flux 或 Mono 作为 f1() 的返回类型作为它的 id 列表及其各自的值

【问题讨论】：

标签： spring-boot spring-webflux reactor

【解决方案1】：

您需要返回Mono<ServerResponse>。

public Mono<ServerResponse> f1(String key) {
    Mono<String> ids = f2(key);
    Flux<IdInfo> idInfoFlux = ids.flatMapIterable(line -> Arrays.asList(line.split(",")))
            .flatMap(id -> {
                Mono<String> idName = getIdName(id);
                Mono<String> idStatus = getIdStatus(id);
                return Mono.zip(idName, idStatus, (name, status) -> new IdInfo(name, status));
            })
            .doOnNext(id -> System.out.println(id));
    return ServerResponse.ok().contentType(MediaType.APPLICATION_JSON).body(idInfoFlux, IdInfo.class);
}

// your DTO class that you would like to pass in response as json
public static class IdInfo {
    String idName;
    String idStatus;

    public IdInfo(String idName, String idStatus) {
        this.idName = idName;
        this.idStatus = idStatus;
    }

    public String toString() {
        return String.format("IdInfo [idName=%s, idStatus=%s]", idName, idStatus);
    }
}

【讨论】：