我有一个应用程序。我有一个大按钮，允许用户一次将所有数据同步到云端。重新同步功能，允许他们再次发送所有数据。 （300多个条目）
我正在使用RXjava2和retrofit2。我的单元测试只需一次通话即可完成。但是我需要进行N次网络呼叫。
我想避免的是让observable调用队列中的下一个项目。我正处于需要实现runnable的地步。我已经看过一些关于地图但我没有看到有人将它用作队列。此外，我想避免让一个项目失败并报告所有项目失败，就像Zip功能一样。我应该只是做一个跟踪队列的令人讨厌的经理类吗？或者是否有更简洁的方式发送数百件物品？
注意：解决方案不能依赖于JAVA8 / LAMBDAS。事实证明，这比合理的工作要多得多。
注意所有项目都是同一个对象。
@Test
public void test_Upload() {
TestSubscriber<Record> testSubscriber = new TestSubscriber<>();
ClientSecureDataToolKit clientSecureDataToolKit = ClientSecureDataToolKit.getClientSecureDataKit();
clientSecureDataToolKit.putUserDataToSDK(mPayloadSecureDataToolKit).subscribe(testSubscriber);
testSubscriber.awaitTerminalEvent();
testSubscriber.assertNoErrors();
testSubscriber.assertValueCount(1);
testSubscriber.assertCompleted();
}
我的帮手收集并发送我的所有物品
public class SecureDataToolKitHelper {
private final static String TAG = "SecureDataToolKitHelper";
private final static SimpleDateFormat timeStampSimpleDateFormat =
new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public static void uploadAll(Context context, RuntimeExceptionDao<EventModel, UUID> eventDao) {
List<EventModel> eventModels = eventDao.queryForAll();
QueryBuilder<EventModel, UUID> eventsQuery = eventDao.queryBuilder();
String[] columns = {...};
eventsQuery.selectColumns(columns);
try {
List<EventModel> models;
models = eventsQuery.orderBy("timeStamp", false).query();
if (models == null || models.size() == 0) {
return;
}
ArrayList<PayloadSecureDataToolKit> toSendList = new ArrayList<>();
for (EventModel eventModel : models) {
try {
PayloadSecureDataToolKit payloadSecureDataToolKit = new PayloadSecureDataToolKit();
if (eventModel != null) {
// map my items ... not shown
toSendList.add(payloadSecureDataToolKit);
}
} catch (Exception e) {
Log.e(TAG, "Error adding payload! " + e + " ..... Skipping entry");
}
}
doAllNetworkCalls(toSendList);
} catch (SQLException e) {
e.printStackTrace();
}
}
我的改造之物
public class ClientSecureDataToolKit {
private static ClientSecureDataToolKit mClientSecureDataToolKit;
private static Retrofit mRetrofit;
private ClientSecureDataToolKit(){
mRetrofit = new Retrofit.Builder()
.baseUrl(Utilities.getSecureDataToolkitURL())
.addCallAdapterFactory(RxJavaCallAdapterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.build();
}
public static ClientSecureDataToolKit getClientSecureDataKit(){
if(mClientSecureDataToolKit == null){
mClientSecureDataToolKit = new ClientSecureDataToolKit();
}
return mClientSecureDataToolKit;
}
public Observable<Record> putUserDataToSDK(PayloadSecureDataToolKit payloadSecureDataToolKit){
InterfaceSecureDataToolKit interfaceSecureDataToolKit = mRetrofit.create(InterfaceSecureDataToolKit.class);
Observable<Record> observable = interfaceSecureDataToolKit.putRecord(NetworkUtils.SECURE_DATA_TOOL_KIT_AUTH, payloadSecureDataToolKit);
return observable;
}
}
public interface InterfaceSecureDataToolKit {
@Headers({
"Content-Type: application/json"
})
@POST("/api/create")
Observable<Record> putRecord(@Query("api_token") String api_token, @Body PayloadSecureDataToolKit payloadSecureDataToolKit);
}
更新。我一直试图将这个答案应用于运气不多。我今晚正在失去动力。我试图将其作为一个单元测试来实现，就像我为一个项目的原始调用所做的那样。看起来像使用lambda的东西是不对的......
public class RxJavaBatchTest {
Context context;
final static List<EventModel> models = new ArrayList<>();
@Before
public void before() throws Exception {
context = new MockContext();
EventModel eventModel = new EventModel();
//manually set all my eventmodel data here.. not shown
eventModel.setSampleId("SAMPLE0");
models.add(eventModel);
eventModel.setSampleId("SAMPLE1");
models.add(eventModel);
eventModel.setSampleId("SAMPLE3");
models.add(eventModel);
}
@Test
public void testSetupData() {
Assert.assertEquals(3, models.size());
}
@Test
public void testBatchSDK_Upload() {
Callable<List<EventModel> > callable = new Callable<List<EventModel> >() {
@Override
public List<EventModel> call() throws Exception {
return models;
}
};
Observable.fromCallable(callable)
.flatMapIterable(models -> models)
.flatMap(eventModel -> {
PayloadSecureDataToolKit payloadSecureDataToolKit = new PayloadSecureDataToolKit(eventModel);
return doNetworkCall(payloadSecureDataToolKit) // I assume this is just my normal network call.. I am getting incompatibility errors when I apply a testsubscriber...
.subscribeOn(Schedulers.io());
}, true, 1);
}
private Observable<Record> doNetworkCall(PayloadSecureDataToolKit payloadSecureDataToolKit) {
ClientSecureDataToolKit clientSecureDataToolKit = ClientSecureDataToolKit.getClientSecureDataKit();
Observable observable = clientSecureDataToolKit.putUserDataToSDK(payloadSecureDataToolKit);//.subscribe((Observer<? super Record>) testSubscriber);
return observable;
}
结果是..
An exception has occurred in the compiler (1.8.0_112-release). Please file a bug against the Java compiler via the Java bug reporting page (http://bugreport.java.com) after checking the Bug Database (http://bugs.java.com) for duplicates. Include your program and the following diagnostic in your report. Thank you.
com.sun.tools.javac.code.Symbol$CompletionFailure: class file for java.lang.invoke.MethodType not found
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':app:compile<MyBuildFlavorhere>UnitTestJavaWithJavac'.
> Compilation failed; see the compiler error output for details.
编辑。不再尝试Lambdas。即使在我的mac上设置路径后，javahome也指向1.8等等。我无法让它工作。如果这是一个较新的项目，我会更加努力。然而，由于这是一个由尝试android的Web开发人员编写的继承的android应用程序，它不是一个很好的选择。也不值得花时间让它发挥作用。已经进入这个任务的日子而不是半天它应该采取。
我找不到一个好的非lambda flatmap示例。我自己尝试了，它变得很乱。
答案 0 :(得分：1)
如果我理解正确，你想并行打电话吗？
所以rx-y这样做的方式就像：
Observable.fromCallable(() -> eventsQuery.orderBy("timeStamp", false).query())
.flatMapIterable(models -> models)
.flatMap(model -> {
// map your model
//avoid throwing exceptions in a chain, just return Observable.error(e) if you really need to
//try to wrap your methods that throw exceptions in an Observable via Observable.fromCallable()
return doNetworkCall(someParameter)
.subscribeOn(Schedulers.io());
}, true /*because you don't want to terminate a stream if error occurs*/, maxConcurrent /* specify number of concurrent calls, typically available processors + 1 */)
.subscribe(result -> {/* handle result */}, error -> {/* handle error */});
在ClientSecureDataToolKit中将此部分移至构造函数
InterfaceSecureDataToolKit interfaceSecureDataToolKit = mRetrofit.create(InterfaceSecureDataToolKit.class);