如何返回 Mono<ServerResponse>

Posted 2023-02-27

【中文标题】如何返回 Mono<ServerResponse>

【英文标题】：How to return 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

【参考方案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);