我目前的
Android应用程序使用Retrofit和RxJava来编排我的网络调用.
我已将我的HTTP GET建模为Single< Response< String>>和POST(s)为可完成.
我要求的电话顺序如下： –
顺序调用GET(1),GET(2),GET(3)
并行呼叫POST(1),POST(2)
POST(1)& POST(2)完成OK,调用GET(4).
我有部分解决方案.我编写了前三个GET的编号
然后是POST电话
我的代码类似于： –
Single.concat(getRequests())
.subscribeOn(Schedulers.single())
.doOnError(throwable -> Log.e(TAG,"Manage Totals Failed",throwable))
.doFinally(new Action() {
@Override
public void run() throws Exception {
manageExecutions(combineExecutions());
}
})
.subscribe();
/**
* @return
*/
private static Iterable<Single<Response<String>>> getRequests() {
final API_CALL_GET[] apiCalls = API_CALL_GET.values();
final List<Single<Response<String>>> requests = new ArrayList<>(apiCalls.length);
for (final API_CALL_GET apiCall : apiCalls) {
requests.add(apiCall.request());
}
return requests;
}
public enum API_CALL_GET {
GET_ONE {
@Override
public Single<Response<String>> request() {
return RETRO_SERVICE
.getOne(authToken,new HashMap<>())
.doAfterSuccess(this::persistDataOne)
.doOnError(error -> ever(error));
}
},GET_TWO {
@Override
public Single<Response<String>> request() {
return RETRO_SERVICE
.getTwo(authToken,new HashMap<>())
.doAfterSuccess(this::persistDataTwo)
.doOnError(error -> ever(error));
}
},GET_THREE {
@Override
public Single<Response<String>> request() {
return RETRO_SERVICE
.getThree(authToken,new HashMap<>())
.doAfterSuccess(this::persistDataThree)
.doOnError(error -> ever(error));
}
};
public abstract Single<Response<String>> request();
}
private static Action manageExecutions(final List<Completable> completables) {
return new Action() {
@Override
public void run() throws Exception {
Completable
.concat(completables)
.subscribeOn(Schedulers.io())
.doOnError(throwable -> Log.e(TAG,throwable))
.doOnComplete(new Action() {
@Override
public void run() throws Exception {
accumulateAmounts();
}
})
.subscribe();
}
};
}
/**
* @return
*/
private static List<Completable> combineExecutions() {
final API_CALL_POST[] apiCalls = API_CALL_POST.values();
final List<Completable> requests = new ArrayList<>(apiCalls.length);
for (final API_CALL_POST apiCall : apiCalls) {
requests.addAll(apiCall.requests());
}
return Lists.newArrayList(Iterables.unmodifiableIterable(requests));
}
public enum API_CALL_POST {
POST_ONE {
@Override
public List<Completable> requests() {
return NetworkController.postRecommenderExecutions();
}
},POST_TWO {
@Override
public List<Completable> requests() {
return NetworkController.postSavedSearcheExecutions();
}
};
public abstract List<Completable> requests();
}
public static List<Completable> postONE() {
final List<Completable> completables = new ArrayList<>();
final List<OneDO> oneDOS = fetchOnes();
for (final OneDO oneDO : oneDOS) {
completables.add(RETRO_SERVICE.runCompletableOnes(authToken,oneDO.getId())
.doOnError(new Consumer<Throwable>() {
@Override
public void accept(final Throwable throwable) throws Exception {
Log.e(TAG,"accept: ",throwable);
}
}));
}
return completables;
}
public static List<Completable> postTWO() {
final List<Completable> completables = new ArrayList<>();
final List<TwoDO> twoDOS = fetchTwos();
for (final TwoDO twoDO : twoDOS) {
completables.add(RETRO_SERVICE.runCompletableTwos(authToken,twoDO.getId())
.doOnError(new Consumer<Throwable>() {
@Override
public void accept(final Throwable throwable) throws Exception {
Log.e(TAG,throwable);
}
}));
}
return completables;
}
我遇到的困难是正确地链接我的电话
Single.concat(GET_1 … GET_N).onComplete(POST_1 … POST_N).onComplete(GET_LAST)
但是我当前的部分解决方案只调用第一组GET,然后是POST,并且GET和POST调用不是“链接”
可以组合Single – >可完成 – >在链式电话中单身？
UPDATE
根据Daniil的回答,我最终得到了这个解决方案： –
Single.concat(getRequests())
.subscribeOn(Schedulers.io())
.doOnError(throwable -> Log.e(TAG,"accept[0000]: ",throwable))
.ignoreElements()
.andThen(Completable.merge(combineExecutions()))
.doOnError(throwable -> Log.e(TAG,throwable))
.doOnComplete(() -> Controller.accumulateTotals())
.subscribe();
解决方法
在kotlin中,它看起来像这样：
fun generateGetRequests(): List<Single<Response<String>>> {
return listOf(retrofit.firstGet(),retrofit.secondGet(),...,retrofit.lastGet())
}
fun generatePostRequests(): List<Completable> {
return listOf(retrofit.firstPost(),retrofit.lastPost())
}
fun doSomethingWithResponses(responses: Array<Any>) {
// Do Something,like save to db
}
fun runRequests() {
Single.zip(generateGetRequests(),{ responses ->
doSomethingWithResponses(responses)
}).ignoreElements()
.andThen(Completable.merge(generatePostRequests()))
.subscribeOn(Schedulers.io())
.subscribe()
}
