reactive-programming

问题 I have a question very similar to this one How to create a Spring Reactor Flux from a ActiveMQ queue? With one difference that messages come from Http endpoint rather than JMS queue. The problem is that Message Channel is not get populated for some reason or it is not picked up by Flux.from(). The log entries show that GenericMessage is created from Http Integration flow with a payload as path variable but does not get enqueued/published to a channel? I tried .channel(MessageChannels.queue())

问题 I have a question very similar to this one How to create a Spring Reactor Flux from a ActiveMQ queue? With one difference that messages come from Http endpoint rather than JMS queue. The problem is that Message Channel is not get populated for some reason or it is not picked up by Flux.from(). The log entries show that GenericMessage is created from Http Integration flow with a payload as path variable but does not get enqueued/published to a channel? I tried .channel(MessageChannels.queue())

问题 Is it possible to extend Throttle Timespan value in middle of a query? For instance, assuming an example as in 101 Rx Samples Throttle there is this query var throttled = observable.Throttle(TimeSpan.FromMilliseconds(750)); . What if I wanted to change it so that if during the first 500 ms there will be no events, then the throttling value would be extended to, e.g., 1500 ms for every event thereafter. Would this be a place to use the Switch operator? 回答1: There is an overload of Throttle

问题 I need to get the content type from a specific URL. I know that we can do it by simply coding: URL url = new URL("https://someurl.com"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("HEAD"); // Request Method: GET/POST/UPDATE... connection.connect(); String contentType = connection.getContentType(); Since this blocks the UI thread (a synchronous operation), how to make a HTTP request using RxJava 2 on Android? Notes: I don't want to make

问题 I need to get the content type from a specific URL. I know that we can do it by simply coding: URL url = new URL("https://someurl.com"); HttpURLConnection connection = (HttpURLConnection) url.openConnection(); connection.setRequestMethod("HEAD"); // Request Method: GET/POST/UPDATE... connection.connect(); String contentType = connection.getContentType(); Since this blocks the UI thread (a synchronous operation), how to make a HTTP request using RxJava 2 on Android? Notes: I don't want to make

问题 I have 3 streams. gradingResult and contextId depend on studentResponse . I need to fire an event and only one event (otherwise, this is trivial) when all 3 have the latest values. I've tried #combineTemplate and #sampledBy studentResponse . Unfortunately, I always see the wrong data--- gradingResult and contextId have the old values in the combined template. How can I wait for all streams to have the latest values? Code is shown below: var studentResponse = new Bacon.Bus(); var gradingResult

问题 I have a component that has two properties that are observables @Component({ }) export class MyComponent { observable1$; observable1$; ngOnInit() { Observable1$ = this.service.getObservable1(); Observable2$ = this.service.getObservable2(); } } I practice, observable2$ will emit bar only after observable1$ emits foo . How can I write a test that simulates this? If I write in my spec mockService.getObservable1.and.returnValue(Observable.of('foo')) mockService.getObservable2.and.returnValue

问题 I have a scenario where timer interval changes on every tick event. As shown in below code: Timer tmrObj = new Timer(); tmrObj.Interval = TimeSpan.FromSeconds(11); tmrObj.Tick += TimerTickHandler; public void TimerTickHandler(EventArg arg) { tmrObj.pause(); var response = MakeSomeServiceCall(); tmr.Interval = response.Interval; tmrObj.resume(); } If I need to implement Timers in Rx for the same. I can achieve using Timer function. But how can I manipulate Interval on event tick as shown in

问题 Just started reading on Reactive extensions. I am trying to watch a simple left mouse button click on my winform. Meaning anywhere there is a click (on any control on the form including the form) I just want to display a message "Click detected". So far I have var mouseDown = Observable.FromEvent<MouseButtonEventArgs>(frmMain, "MouseDown"); //missing code please fill here mouseDown.Subscribe(() => Debug.WriteLine("left click detected."); I know the first line will detect any mouse event. I

问题 Just started reading on Reactive extensions. I am trying to watch a simple left mouse button click on my winform. Meaning anywhere there is a click (on any control on the form including the form) I just want to display a message "Click detected". So far I have var mouseDown = Observable.FromEvent<MouseButtonEventArgs>(frmMain, "MouseDown"); //missing code please fill here mouseDown.Subscribe(() => Debug.WriteLine("left click detected."); I know the first line will detect any mouse event. I