Question

我正在学习RX Java，我希望将N个并行请求发送到Web API，并将合并后的结果合并到一个List中。我正在使用Retrofit和RXJava扩展来发送请求：

@GET("getForkliftDetail")
Observable<ForkliftDetail> getForkliftDetail(
        @Query("lang") String language,
        @Query("id") Integer forkliftId);

我发送请求的函数如下所示：

List<Observable<ForkliftDetail>> requests = new ArrayList<>();
    for (Forklift item: forkliftParkList) {
        requests.add(service.fetchForkliftDetails(locale, item.getId()));
    }
    Observable.zip(
            requests,
            new FuncN(){
                public ForkliftDetail call(ForkliftDetail... args) {
                    Log.i("RX TEST", args.toString());
                    return new ForkliftDetail();
                }})
            // After all requests had been performed the next observer will receive the Object, returned from Function
            .subscribe(
                    // Will be triggered if all requests will end successfully (4xx and 5xx also are successful requests too)
                    new Consumer<Object>() {
                        @Override
                        public void accept(Object o) throws Exception {
                            //Do something on successful completion of all requests
                        }
                    },

                    // Will be triggered if any error during requests will happen
                    new Consumer<Throwable>() {
                        @Override
                        public void accept(Throwable e) throws Exception {
                            //Do something on error completion of requests
                        }
                    }
            );

然而，我在这一点上陷入困境。 FuncN错误说我需要实现call(Object...)。我认为FuncN方法是我可以将所有响应ForkliftDetail对象添加到新列表并返回它的地方。请帮我理解这个。提前谢谢！

Answer 1

试试这个：

List<Observable<ForkliftDetail>> requests = new ArrayList<>();
for (Forklift item: forkliftParkList) {
    requests.add(service.fetchForkliftDetails(locale, item.getId()));
}

Observable.zip(
    requests,
    new Function<Object[], ForkliftDetail>() {
        @Override
        public ForkliftDetail apply(Object[] args) {
                Log.i("RX TEST", Arrays.toString(args));
                return new ForkliftDetail();
            }
        }
    )
    .subscribe(
        new Consumer<Object>() {
            @Override
            public void accept(Object o) throws Exception {
            }
        },
        new Consumer<Throwable>() {
            @Override
            public void accept(Throwable e) throws Exception {
            }
        }
    );

RXJava中的Zip方法

1 个答案: